US Patent Class 210
LIQUID PURIFICATION OR SEPARATION




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Current as of: June, 1999
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  DF  CLASS NOTES
600  DF  PROCESSES
601  DF  .~ Treatment by living organism
602  DF  .~.~ Including plant or animal of higher order
603  DF  .~.~ Including collecting or storing gas (e.g., fuel, carbon monoxide, etc.)
604  DF  .~.~.~ And reusing oxidant
605  DF  .~.~ Anaerobically, with subsequently aerobically treating liquid
606  DF  .~.~ Adding enzyme or releasing same by treating microorganism
607  DF  .~.~ Dividing, treating, and recombining liquid
608  DF  .~.~ Regulating floating constituent
609  DF  .~.~ Including dewatering sludge
610  DF  .~.~ Including adding ancillary growth medium for microorganism
611  DF  .~.~.~ For or with specific microorganism
612  DF  .~.~ And regulating temperature during biological step
613  DF  .~.~.~ Digesting sludge
614  DF  .~.~ Controlling process in response to stream constituent or reactant concentration
615  DF  .~.~ Utilizing contact surfaces supporting microorganism (e.g., trickling filter, etc.)
616  DF  .~.~.~ Particulate media
617  DF  .~.~.~.~ In bed form
618  DF  .~.~.~.~.~ And rehabilitating or regenerating same
619  DF  .~.~.~ Rotating contactor
620  DF  .~.~ Aerobic treatment
621  DF  .~.~.~ Recirculating to prior step
622  DF  .~.~.~.~ Of separated liquid
623  DF  .~.~.~.~ Of sludge or separated solid
624  DF  .~.~.~.~.~ And returning to or withdrawing from diverse treating zones
625  DF  .~.~.~.~.~ Treating outside mainstream
626  DF  .~.~.~.~.~ To mainstream oxygenation (e.g., activated sludge, etc.)
627  DF  .~.~.~.~.~.~ Utilizing specific oxidant, other than air alone (e.g., oxygen-enriched air, ozone, peroxide, etc.)
628  DF  .~.~.~.~.~.~ Utilizing mechanical aeration means
629  DF  .~.~.~ And internally circulating the liquid
630  DF  .~.~.~ And anaerobic treatment
631  DF  .~.~ And additional treating agent other than mere mechanical manipulation (e.g., chemical, sorption, etc.)
632  DF  .~ Treating by enzyme
633  DF  .~ Extracting utilizing solid solute
634  DF  .~ Liquid/liquid solvent or colloidal extraction or diffusing or passing through septum selective as to material of a component of liquid; such diffusing or passing being effected by other than only an ion exchange or sorption process
635  DF  .~.~ Liquid/liquid or gel type (i.e., jellylike) chromatography
636  DF  .~.~ Including cleaning or sterilizing of apparatus
637  DF  .~.~ Including regulating pressure to control constituent gradient at membrane or to prevent rupture of membrane
638  DF  .~.~ Including ion exchange or other chemical reaction
639  DF  .~.~ Including prior use of additive (e.g., changing pH, etc.)
640  DF  .~.~ Passing through membrane in vapor phase
641  DF  .~.~ Utilizing plural diverse membranes
642  DF  .~.~ Extracting water from brine utilizing liquid/liquid solvent or colloidal extraction
643  DF  .~.~ Utilizing liquid membrane (e.g., emulsion) in liquid/liquid solvent or colloidal extraction
644  DF  .~.~ Diffusing or passing through septum selective as to material of a component in liquid/liquid solvent or colloidal extraction
645  DF  .~.~.~ Biological fluid (e.g., blood, urine, etc.)
646  DF  .~.~.~.~ Hemodialysis
647  DF  .~.~.~.~.~ Maintaining critical concentration(s)
648  DF  .~.~.~ Including regenerating or rehabilitating the extracting liquid in liquid/liquid solvent or colloidal extraction
649  DF  .~.~ Diffusing or passing through septum selective as to material of a component of liquid
650  DF  .~.~.~ Filtering through membrane (e.g., ultrafiltration)
651  DF  .~.~.~.~ Removing specified material
652  DF  .~.~.~.~ Hyperfiltration (e.g., reverse osmosis, etc.)
653  DF  .~.~.~.~.~ Utilizing specified membrane material
654  DF  .~.~.~.~.~.~ Synthetic resin
655  DF  .~.~.~.~.~.~ Cellulosic
656  DF  .~ Chromatography
657  DF  .~.~ Utilizing rotating column
658  DF  .~.~ Utilizing paper or thin layer plate
659  DF  .~.~ Including liquid flow diversion
660  DF  .~ Ion exchange or selective sorption
661  DF  .~.~ By passing through suspended bed
662  DF  .~.~ And liquid testing or volume measuring
663  DF  .~.~ Including diverse separating or treating of liquid
664  DF  .~.~.~ By distilling or degassing
665  DF  .~.~.~ By making an insoluble substance or accreting suspended constituents
666  DF  .~.~.~.~ Utilizing organic agent
667  DF  .~.~.~.~ Utilizing aluminum, calcium, or iron containing agent
668  DF  .~.~.~ By chemically modifying or inhibiting dispersed constituent
669  DF  .~.~.~ Prior to ion exchange or sorption
670  DF  .~.~ Including rehabilitating or regenerating exchange material or sorbent
671  DF  .~.~.~ Of oil sorbent material
672  DF  .~.~.~ Fractional, selective, or partial type
673  DF  .~.~.~ Utilizing gas, water, or chemical oxidizing or reducing agent
674  DF  .~.~.~ Utilizing organic regenerant
675  DF  .~.~.~ Rehabilitating or regenerating in diverse zone or chamber
676  DF  .~.~.~.~ Continuous cyclic process
677  DF  .~.~.~ Using conserved or recirculated fluid
678  DF  .~.~.~ Including liquid flow direction change
679  DF  .~.~ Utilizing exchange or sorbent material associated with inert material
680  DF  .~.~.~ Including oil sorbent
681  DF  .~.~ Removing ions
682  DF  .~.~.~ Radioactive
683  DF  .~.~.~ Anions
684  DF  .~.~.~.~ Metal complexed (e.g., chromate, ferricyanide, chlorplatinate, etc.)
685  DF  .~.~.~.~ Including cation
686  DF  .~.~.~.~.~ Utilizing mixed bed or amphoteric material
687  DF  .~.~.~ Calcium or magnesium (e.g., hardness, water softening, etc.)
688  DF  .~.~.~ Heavy metal
689  DF  .~.~ Sorbing water from diverse liquid
690  DF  .~.~ Sorbing organic constituent
691  DF  .~.~.~ From aqueous material
692  DF  .~.~.~.~ Utilizing synthetic resin
693  DF  .~.~.~.~.~ Oil removed
694  DF  .~.~.~.~ Utilizing activated carbon
695  DF  .~ Using magnetic force
696  DF  .~ Preventing, decreasing, or delaying precipitation, coagulation or flocculation
697  DF  .~.~ Utilizing inorganic phosphorus agent
698  DF  .~.~ Utilizing organic agent
699  DF  .~.~.~ Phosphorus containing
700  DF  .~.~.~.~ Nitrogen containing
701  DF  .~.~.~ Acrylic polymer
702  DF  .~ Making an insoluble substance or accreting suspended constituents
703  DF  .~.~ Effecting flotation
704  DF  .~.~.~ Including chemical addition (with or without bouyancy gas)
705  DF  .~.~.~.~ Chemically specified precipitant, coagulant, or flocculant
706  DF  .~.~.~.~.~ And significant characteristic of the bouyancy gas, other than mere addition of same
707  DF  .~.~.~.~.~.~ Generating gas in situ
708  DF  .~.~ Including emulsion breaking
709  DF  .~.~ Controlling process in response to stream condition
710  DF  .~.~ Treating the insoluble substance
711  DF  .~.~.~ For recovery of a treating agent
712  DF  .~.~ Including recycling
713  DF  .~.~.~ Of separated solids
714  DF  .~.~ Seeding
715  DF  .~.~.~ Utilizing sludge or floc blanket
716  DF  .~.~ Including step of manufacturing inorganic treating agent
717  DF  .~.~.~ In situ
718  DF  .~.~ Including degassing
719  DF  .~.~ Including chemical reduction
720  DF  .~.~.~ Of chromium material
721  DF  .~.~ Including oxidation
722  DF  .~.~.~ Of iron or manganese material
723  DF  .~.~ Utilizing precipitant, flocculant, or coagulant, each with accelerator or with each other or plural precipitants, flocculants, or coagulants
724  DF  .~.~.~ Regulating pH
725  DF  .~.~.~.~ Utilizing organic precipitant
726  DF  .~.~.~ Sequential introduction
727  DF  .~.~.~.~ Including organic agent
728  DF  .~.~.~ Including organic agent
729  DF  .~.~ Utilizing organic precipitant
730  DF  .~.~.~ From natural source or chemical modification thereof
731  DF  .~.~.~.~ Starch
732  DF  .~.~.~ Synthetic polymer
733  DF  .~.~.~.~ Acrylic
734  DF  .~.~.~.~.~ Nitrogen containing (e.g., amine, azo, etc.)
735  DF  .~.~.~.~ Nitrogen containing (e.g., amine, azo, etc.)
736  DF  .~.~.~.~.~ Derived from alkyl halide or epihalophydrin reactant
737  DF  .~.~ Including temperature change
738  DF  .~.~ Including agitation
739  DF  .~ Including controlling process in response to a sensed condition
740  DF  .~.~ Density or specific gravity sensing
741  DF  .~.~ Pressure sensing
742  DF  .~.~ Temperature sensing
743  DF  .~.~ pH sensing
744  DF  .~.~ Level sensing
745  DF  .~.~ Turbidity or optically sensing
746  DF  .~.~ Electrical property sensing
747  DF  .~ Including geographic feature (e.g., drainage ditch, septic, pond)
748  DF  .~ Utilizing electrical or wave energy (directly applied to liquid or material being treated)
749  DF  .~ Chemical treatment
750  DF  .~.~ Including degassing
752  DF  .~.~ Plural spaced feedings
753  DF  .~.~ Utilizing halogen or halogen containing material
754  DF  .~.~.~ Chlorine or bromine containing
755  DF  .~.~.~.~ Organic
756  DF  .~.~.~.~ Hypochlorite
757  DF  .~.~ By chemical reduction
758  DF  .~.~ By oxidation
759  DF  .~.~.~ Utilizing peroxy compound (e.g., hydrogen peroxide, peracid, etc.)
760  DF  .~.~.~ Utilizing ozone
761  DF  .~.~.~ Liquid phase high temperature and pressure (e.g., "wet air", etc.)
762  DF  .~.~.~.~ Catalytic
763  DF  .~.~.~ Catalytic
764  DF  .~.~ Destroying microorganisms
765  DF  .~.~ Including liquid recirculation
766  DF  .~.~ Including temperature change
767  DF  .~ Separating
768  DF  .~.~ Including treating separated solids
769  DF  .~.~.~ Destroying cake or solid component
770  DF  .~.~.~ Including drying (e.g., by squeezing or heating, etc.)
771  DF  .~.~.~.~ By gas contact
772  DF  .~.~.~ Washing with a fluid other than the prefilt
773  DF  .~.~ Including preliminary conversion to liquid state
774  DF  .~.~ Including temperature change
775  DF  .~.~.~ Thermal diffusion
776  DF  .~.~ Skimming
777  DF  .~.~ Including precoating filter medium with filter aid
778  DF  .~.~.~ With or by addition to prefilt
779  DF  .~.~ Discharging residue to prefilt
780  DF  .~.~ Including movement of filter during filtration
781  DF  .~.~.~ Centrifugally extracting
782  DF  .~.~.~.~ Blood
783  DF  .~.~.~ Rotating belt
784  DF  .~.~.~ Rotating drum
785  DF  .~.~.~ Cleaning filter utilizing wave energy (e.g., vibrating, pulsating, etc.)
786  DF  .~.~.~ Of particulate bed (e.g., fluidized or moving bed, etc.)
787  DF  .~.~ Cyclonic, or centrifugal (e.g., whirling or helical motion or by vortex, etc.)
788  DF  .~.~.~ Introducing liquid tangentially
789  DF  .~.~.~ Isolating layer
790  DF  .~.~ Dividing and recombining
791  DF  .~.~ Rehabilitating or regenerating filter medium
792  DF  .~.~.~ Particulate bed
793  DF  .~.~.~.~ Reverse flow
794  DF  .~.~.~.~.~ Including addition of diverse fluid
795  DF  .~.~.~.~.~.~ Expanded bed
796  DF  .~.~.~.~ Includng mechanical agitation
797  DF  .~.~.~ By diverse fluid
798  DF  .~.~.~.~ Reverse flow
799  DF  .~.~ Filtering immiscible liquids
800  DF  .~.~ Utilizing gravitational force
801  DF  .~.~.~ Including change of mainstream flow direction
802  DF  .~.~.~.~ Utilizing parallel separation passages
803  DF  .~.~.~ Including specified feature of settled solids removal
804  DF  .~.~.~ And additional diverse separation
805  DF  .~.~ And recirculating liquid
806  DF  .~.~ Plural separating
807  DF  .~.~ Utilizing particulate bed
808  DF  .~.~ Including specified pressure change
85  DF  WITH ALARM, INDICATOR, REGISTER, RECORDER, SIGNAL OR INSPECTION MEANS
86  DF  .~ Material level or thickness responsive
87  DF  .~ Responsive to fluid flow
88  DF  .~.~ Meter-controlled cyclic systems
89  DF  .~.~.~ With time control
90  DF  .~ Fluid pressure responsive
91  DF  .~ Position or extent of motion
92  DF  .~ Test valve
93  DF  .~ In effluent conduit
94  DF  .~ Transparent
95  DF  .~.~ Sight glass
96.1  DF  CONSTITUENT MIXTURE VARIATION RESPONSIVE
96.2  DF  .~ With membrane
97  DF  FLOW, FLUID PRESSURE OR MATERIAL LEVEL, RESPONSIVE
98  DF  .~ Fluid current controlled cyclic system
99  DF  .~ Prefilt deverting to drain by prefilt accumulation
100  DF  .~ Flow cut-off requiring reset
101  DF  .~ Proportionate feed means
102  DF  .~ Programming plural units
103  DF  .~ Diverse sensing means
104  DF  .~.~ Responsive to material level
105  DF  .~.~ With control for auxiliary liquid inlet
106  DF  .~ Filter cleaning
107  DF  .~.~ Rotary movement of filter or mechanical cleaner
108  DF  .~.~ Backwash or blowback
109  DF  .~ Discharge of treated material
110  DF  .~.~ With separator inlet control
111  DF  .~.~ Responsive to prefilt accumulation or filter clogging
112  DF  .~.~ Heavier constituent
113  DF  .~.~.~ By weight of solids
114  DF  .~.~.~ By treated liquid accumulation
115  DF  .~.~.~ With lighter constituent outlet control
116  DF  .~.~ Permitted by filtrate accumulation
117  DF  .~.~ Check valve controlled
118  DF  .~.~.~ Non-closing, e.g., sand valve
119  DF  .~.~.~ Float type
120  DF  .~ Vent control
121  DF  .~ Float
122  DF  .~.~ Controls movable separator
123  DF  .~.~ Controls valve
124  DF  .~.~.~ Controls flow between two separators
125  DF  .~.~.~ Separator between float and valve
126  DF  .~.~.~ Float in separate rehabilitating fluid tank
127  DF  .~.~.~ Additional fluid inlet control
128  DF  .~.~.~ Float in receptacle other than that of separator
129  DF  .~.~.~.~ In flow between inlet and separator
130  DF  .~ Fluid pressure responsive by-pass
131  DF  .~.~ By movement of separation medium
132  DF  .~.~ With additional separation or treating means
133  DF  .~.~ In inlet and outlet closure header
134  DF  .~ Plural elements controlled
135  DF  .~.~ Including manually controlled element
136  DF  .~ Check valve
137  DF  .~ Maintaining stream pressure or flow
138  DF  WITH TIME CONTROL
139  DF  .~ Of additional fluid
140  DF  .~.~ Preparation for treating operation
141  DF  WITH PROGRAM ACTUATOR
142  DF  .~ Plural treating units or sections sequentially controlled
143  DF  AUTOMATIC CONTROL
144  DF  .~ Responsive to vibration or unbalance
145  DF  .~ Responsive to rotation
146  DF  .~.~ Controlled cover latch
147  DF  .~.~ Controlled discharge means
148  DF  .~ Container movement operated
149  DF  .~ Thermal
150  DF  WITH GAS-LIQUID SURFACE CONTACT MEANS
151  DF  .~ With separator
153  DF  STRUCTURAL INSTALLATION
154  DF  .~ Flume stream type
155  DF  .~.~ Plural or diverse screens
156  DF  .~.~ Fluid stream or residue operated
157  DF  .~.~.~ Revolving cylindrical strainer
158  DF  .~.~ With cleaner for movable strainer
159  DF  .~.~ With cleaner and means to remove residue therefrom
160  DF  .~.~ Endless belt strainer
161  DF  .~.~ Revolving strainer
162  DF  .~.~ Fixed strainer
163  DF  .~ Grated inlet surface drain
164  DF  .~.~ Flat grating at surface level
165  DF  .~.~.~ With subsurface weep means
166  DF  .~.~ Concentric guard ring or rib
167  DF  .~ Closed circulating systems
168  DF  .~.~ Lubrication
169  DF  .~.~ Aquarium or swimming pool
170  DF  .~ Geographic (e.g., drainage ditch, septic, pond)
171  DF  .~ Machinery
172  DF  .~ Ancillary to storage tank
173  DF  COMMINUTING
174  DF  .~ Cylindrical strainer
175  DF  WITH HEATER OR HEAT EXCHANGER
176  DF  .~ Thermal diffusion
177  DF  .~ With treating fluid addition
178  DF  .~.~ With mechanical agitator or movable separator
179  DF  .~ With mechanical agitator or movable separator
180  DF  .~ Vapor or gas removal
181  DF  .~ Flow line connected in series with distinct separator
182  DF  .~ Diverse separators
183  DF  .~.~ Common casing coaxial with heater
184  DF  .~ For filter
185  DF  .~.~ Imbedded or between filter media
186  DF  .~.~ External of casing
187  DF  .~ Within gravitational separator
188  DF  WITH GAS SEPARATOR
189  DF  PLURAL CHAMBERS WITH MOVEMENT OF GRANULES THEREBETWEEN
190  DF  WITH EXTERNAL SUPPLY MEANS FOR REGENERATING MEDIUM, E.G., WATER SOFTENING SYSTEM
191  DF  .~ With pump, injector or siphon
192  DF  WITH PRELIMINARY CHEMICAL MANUFACTURE
193  DF  WITH PRECOAT ADDING OR APPLYING MEANS
194  DF  RECIRCULATION
195.1  DF  .~ Serially connected distinct treating or storage units
195.2  DF  .~.~ With semipermeable membrane, e.g., dialyzer, etc.
195.3  DF  .~.~ With sediment recycle means directly to main stream
195.4  DF  .~.~.~ Means is baffle slot
196  DF  .~ Of filtrate
197  DF  .~ From bottom of separator
198.1  DF  WITH MEANS TO ADD TREATING MATERIAL
198.2  DF  .~ Chromatography
198.3  DF  .~.~ Thin layer, e.g., plate, etc.
199  DF  .~ Spaced along flow path
200  DF  .~ Plural distinct separators
201  DF  .~.~ Serially connected
202  DF  .~.~.~ Diverse type
203  DF  .~.~ Filters
204  DF  .~.~.~ Sectional chamber press type
205  DF  .~ With distinct reactor tank, trough or compartment
206  DF  .~.~ Chemical holder in series with separator
207  DF  .~.~ Within gravitational separator
208  DF  .~.~.~ With mechanical agitator
209  DF  .~ Directly applied to separator
210  DF  .~.~ To interior of moving filter, e.g., drum
211  DF  .~.~.~ Through separator supporting rotary shaft
212  DF  .~.~.~ With stationary casing closure feature
213  DF  .~.~.~ With coaxial rotary impeller or distributor
214  DF  .~.~.~ With stationary mount for movable distributor
215  DF  .~.~.~ With effluent dividing means
216  DF  .~.~ Moving filter medium
217  DF  .~.~.~ Drum
218  DF  .~.~ Gas removed from closed tank
219  DF  .~.~ With mechanical agitator
220  DF  .~.~ Submerged fluid inlet
221.1  DF  .~.~.~ With outlet at surface, e.g., froth flotation, etc.
221.2  DF  .~.~.~.~ And gas injecting means other than by mechanical agitation
222  DF  MAGNETIC
223  DF  .~ With additional separator
224  DF  SECTIONAL CHAMBER PRESS TYPE
225  DF  .~ With residue removal or liquid agitation
226  DF  .~ With porous filler
227  DF  .~ Medium clamped in joint
228  DF  .~.~ With spacing frame
229  DF  .~.~ Imperforate base recess in plate
230  DF  .~ With repair or assembling means
231  DF  .~ Plates or frames
232  DF  WITH REPAIR OR ASSEMBLING MEANS
233  DF  .~ Piercing or closure knock out means
234  DF  .~ Removable treatment part with normally disabled flow controller
235  DF  .~ Placement of container opens flow controller
236  DF  .~ Sliding or rolling on guide means
237  DF  .~ Hoist or handle means
238  DF  .~.~ Hand manipulable
239  DF  CONVERTIBLE
240  DF  .~ Filter having selectively usable flow connector means
241  DF  WITH MOVABLE SUPPORT
242.1  DF  .~ Float
242.2  DF  .~.~ With aerating means
242.3  DF  .~.~ With oil water skimmer
242.4  DF  .~.~ With oil water sorption means
243  DF  ELECTRICAL INSULATING OR ELECTRICITY DISCHARGING
244  DF  PORTABLE RECEPTACLE WITH HOOD OR CLOSURE
245  DF  .~ Attached variable flow controller
246  DF  .~ Limited opening cover
247  DF  FILTRATE SPLASH PLATE AND/OR DEFLECTOR
248  DF  WITH DRIP, OVERFLOW OR CONTENT DRAINING FEATURE
249  DF  BRACKET OR LEG SUPPORT FOR STATIC SEPARATOR ASSEMBLY
250  DF  .~ Leg
251  DF  COMBINED
252  DF  SERIALLY CONNECTED DISTINCT TREATING WITH OR WITHOUT STORAGE UNITS
253  DF  .~ Parallel
254  DF  .~ With by-pass
255  DF  .~ Cascade
256  DF  .~ One unit inside another
257.1  DF  .~ With storage unit
257.2  DF  .~.~ Having membrane
258  DF  .~ With pump, gas pressure or vacuum source
259  DF  .~ Diverse
260  DF  .~.~ Including multiple operation unit
261  DF  .~.~ One unit supports another
262  DF  .~.~ On different levels
263  DF  PARTICULATE MATERIAL TYPE SEPARATOR, E.G., ION EXCHANGE OR SAND BED
264  DF  .~ Selective units or compartments
265  DF  .~ With gravitational separator
266  DF  .~ With spaced non-particulate separating means
267  DF  .~ Trunnion mounted casing
268  DF  .~ Gravity flow of particles type
269  DF  .~ With rehabilitation means
270  DF  .~.~ Movable means for particle pickup and redeposit
271  DF  .~.~ Surface traversing type
272  DF  .~.~.~ Rotating on stationary axis
273  DF  .~.~.~ Moving fluid distributor
274  DF  .~.~ Including means to apply gas to bed
275  DF  .~.~ Backwash or blowback means
276  DF  .~.~.~ With mechanical agitator or residue remover
277  DF  .~.~.~ Flow controller external of closed casing
278  DF  .~.~.~.~ Multi-way valve unit
279  DF  .~.~.~ With embedded fluid distributor
280  DF  .~.~ With agitator
281  DF  .~.~ With access opening to normally closed casing
282  DF  .~ Removable cartridge or hand-manipulated container
283  DF  .~ Pervious divider between and contacting beds
284  DF  .~ Spaced beds
285  DF  .~ Embedded baffle
286  DF  .~.~ Vertical
287  DF  .~ Within flow line or flow line connected closed casing
288  DF  .~.~ Conduit through bed, inlet and outlet at same end of casing
289  DF  .~.~ With particular liquid receiving means or foraminous bed retainer
290  DF  .~ With multi-layer beds
291  DF  .~ Particular liquid receiving means or foraminous bed retainer
292  DF  .~.~ Hood or top protector type
293  DF  .~.~ Floor type, e.g., false bottom
294  DF  DIVERSE DISTINCT SEPARATORS
295  DF  .~ Including a filter
296  DF  .~.~ Including liquid as a separating medium
297  DF  .~.~ Moving filter medium
298  DF  .~.~ With mechanical residue or sediment mover
299  DF  .~.~ Including constituent trapping feature
300  DF  .~.~.~ Alternate filters and traps in series
301  DF  .~.~.~.~ Plural traps
302  DF  .~.~.~ Flow-line valve upstream of separator
303  DF  .~.~.~ Cut-off sediment trap
304  DF  .~.~.~ Tangential flow, spiral or convolute baffle
305  DF  .~.~.~ Baffle preceding or within sediment trap
306  DF  .~.~.~.~ Deflecting prefilt from filter medium
307  DF  .~.~.~ Downstream of filter medium
308  DF  .~.~.~ Directly communicating with tubular filter interior
309  DF  .~.~.~.~ Attached to filter element
310  DF  .~.~.~ Lateral trap
311  DF  .~.~.~ Downflow inlet, upflow through filter medium
312  DF  .~.~.~ Sediment discharge means
313  DF  .~.~.~.~ Valve controlled
314  DF  .~.~ Spaced filters
315  DF  .~.~.~ One within another
316  DF  .~.~.~ One adjacent inlet or outlet conduit
317  DF  .~.~.~ Including non-self-supporting medium
318  DF  .~.~.~ Incompatible shapes
319  DF  .~ With agitator
320  DF  .~ With baffle perpendicular to flow direction
321.6  DF  CASING DIVIDED BY MEMBRANE INTO SECTIONS HAVING INLET(S) AND/OR OUTLET(S)
321.61  DF  .~ Membrane secured with adhesive of specified composition
321.62  DF  .~ Antithrombogenic membrane
321.63  DF  .~ Rotating mechanical agitator adjacent membrane
321.64  DF  .~ Plural diverse structured membranes within a single casing
321.65  DF  .~ Permeated liquid quantity measurement or control
321.66  DF  .~ Energy recovery from treated liquid
321.67  DF  .~ Membrane movement during purification
321.68  DF  .~.~ Nontranslatory rotary
321.69  DF  .~ With membrane cleaning or sterlizing means (other than by filter movement or rotating agitator)
321.7  DF  .~.~ Solid cleaning material (e.g., balls)
321.71  DF  .~ Dialyzer with dialysate proportioning means
321.72  DF  .~ Each section having inlet(s) and outlet(s)
321.73  DF  .~.~ Noncoiled nonannular cross section tube
321.74  DF  .~.~ Coiled membrane
321.75  DF  .~.~ Planar membrane
321.76  DF  .~.~.~ Spiral flow
321.77  DF  .~.~ Pleated membrane
321.78  DF  .~.~ Cylindrical membrane
321.79  DF  .~.~.~ Plural cylindrical membranes all connected for parallel flow
321.8  DF  .~.~.~.~ All cylindrical membranes are parallel
321.81  DF  .~.~.~.~.~ With embedded baffle
321.82  DF  .~ Noncoiled nonannular cross section tube
321.83  DF  .~ Coiled membrane
321.84  DF  .~ Planar membrane
321.85  DF  .~.~ Spiral flow
321.86  DF  .~ Pleated membrane
321.87  DF  .~ Cylindrical membrane
321.88  DF  .~.~ Plural cylindrical membranes all connected for parallel flow
321.89  DF  .~.~.~ All cylindrical membranes are parallel
321.9  DF  .~.~.~.~ With embedded baffle
322  DF  PLURAL DISTINCT SEPARATORS
323.1  DF  .~ Filters
323.2  DF  .~.~ Tubular
324  DF  .~.~ Movable separating elements
325  DF  .~.~.~ Planetary
326  DF  .~.~.~ Drum type on parallel axis
327  DF  .~.~.~ Plural cleaners and plural movable elements
328  DF  .~.~.~ Pivotally mounted sections
329  DF  .~.~.~ Relatively movable
330  DF  .~.~.~ Connected for group operation
331  DF  .~.~.~.~ Spaced filter wall type, e.g., multiple hollow leaves
332  DF  .~.~ With residue removal or liquid agitation
333.01  DF  .~.~.~ Backwash or blowback
333.1  DF  .~.~.~.~ Sequential backwash
334  DF  .~.~.~ Alternating filter and residue remover
335  DF  .~.~ In series for prefilt flow
336  DF  .~.~.~ Tortuous path
337  DF  .~.~.~ Nested units
338  DF  .~.~.~.~ Concentric filter elements
339  DF  .~.~.~ Internal flange supporting filter element
340  DF  .~.~ Parallel filters with flow controller
341  DF  .~.~.~ Individually controlled for removal with common receiver
342  DF  .~.~ One element within another
343  DF  .~.~ Alternating oppositely opening liquid distributors
344  DF  .~.~ Abutted alternating medium and pan type receiver
345  DF  .~.~ Radial or radially connected to central header
346  DF  .~.~ Spaced wall-type filters
347  DF  .~.~.~ Central header
348  DF  FILTER
349  DF  .~ Pulsation dampener or gas trapping
350  DF  .~ With movable means to compress medium
351  DF  .~.~ Actuating means external of closed casing
352  DF  .~.~ Internal spring
353  DF  .~ Free cleaning means, e.g., loose abrading particles
354  DF  .~ Medium, cleaner or agitator moved by fluid
355  DF  .~.~ Cleaner
356  DF  .~.~ Medium flexed
357  DF  .~ Relatively movable members interleaved for cleaning
358  DF  .~ Imperforate drum, medium on arc, chord or end
359  DF  .~ Movable medium
360.1  DF  .~.~ Centrifugal extractor
360.2  DF  .~.~.~ With inward flow of feed component
361  DF  .~.~.~ With individual article container or support
362  DF  .~.~.~.~ Container or support reversible
363  DF  .~.~.~ With adjustable rotation stabilizer
364  DF  .~.~.~ Casing, shaft and filter unit gyratorily mounted
365  DF  .~.~.~ Shaft and filter unit gyratorily mounted
366  DF  .~.~.~.~ Gyratory mounting above filter
367  DF  .~.~.~ Filter gyratorily mounted on shaft
368  DF  .~.~.~ With rotation brake
369  DF  .~.~.~ Discharging residue
370  DF  .~.~.~.~ Secondary motion of filter medium
371  DF  .~.~.~.~ With variable flow controller
372  DF  .~.~.~.~ By residue engaging means
373  DF  .~.~.~.~.~ Fixed
374  DF  .~.~.~.~.~ Rotatable
375  DF  .~.~.~.~.~.~ Pivoted
376  DF  .~.~.~.~.~ Axially reciprocable
377  DF  .~.~.~ Internal work distributor
378  DF  .~.~.~ Including filtrate receiving means having plural filtrate outlets
379  DF  .~.~.~ Including filtrate receiving trough adjacent top discharge
380.1  DF  .~.~.~ Rotating element construction
380.2  DF  .~.~.~.~ Laundry
380.3  DF  .~.~.~.~ Horizontal axis
381  DF  .~.~.~.~ Inwardly extending partitions
382  DF  .~.~.~.~ Top filtrate discharge
383  DF  .~.~ Separate agitator
384  DF  .~.~ Vibrator and unidirectional motion filter medium
385  DF  .~.~ With plural motion
386  DF  .~.~ Rolls or confining members contacting residue
387  DF  .~.~ Unrollable
388  DF  .~.~ Vibrating or longitudinally reciprocating
389  DF  .~.~.~ Longitudinally moving prefilt type
390  DF  .~.~ Mounted on movable valve element
391  DF  .~.~ With cleaning means
392  DF  .~.~.~ Fixed position or attached valve blocking means
393  DF  .~.~.~ Backwash or blowback and additional cleaner
394  DF  .~.~.~ Discharging inside, e.g., internal-type drum
395  DF  .~.~.~ With filter-driven valve means
396  DF  .~.~.~ Solid cleaner, e.g., scraper
397  DF  .~.~.~.~ With plural outlets from filter casing
398  DF  .~.~ Within sealed enclosure
399  DF  .~.~.~ Movable casing
400  DF  .~.~ Belt type
401  DF  .~.~.~ Superimposed on additional moving support
402  DF  .~.~ Drum type
403  DF  .~.~.~ Internal feed
404  DF  .~.~.~ Annular segmented compartment
405  DF  .~ Movable prefilt distributor
406  DF  .~ Vacuumized filtrate receiver
407  DF  .~ With residue removing means or agitation of liquid
408  DF  .~.~ Diverse, e.g., combined agitators, scrapers, aeration blowback
409  DF  .~.~ Fluid cleaning
410  DF  .~.~.~ Air pump type
411  DF  .~.~.~ Backwash or blowback
412  DF  .~.~.~.~ Liquid pulsator
413  DF  .~.~ Fixed filter medium and movable stirrer or cleaner
414  DF  .~.~.~ With plural outlets from filter casing
415  DF  .~.~.~ Nontranslatory rotary
416.1  DF  .~ With pump, gas pressure, or suction source
416.2  DF  .~.~ For aquarium or swimming pool
416.3  DF  .~.~ For drinking water
416.4  DF  .~.~ For fuel system
416.5  DF  .~.~ For lubricating or oil treating system
417  DF  .~ Alternating oppositely opening liquid distributors
418  DF  .~ With flow controller for material being treated
419  DF  .~.~ Attached to or within portable prefilt receiver
420  DF  .~.~ Selective directive flow relative to filter
421  DF  .~.~.~ Pivoted prefilt deflector
422  DF  .~.~.~ Plural outlets from filter casing
423  DF  .~.~.~.~ Attached unitary plural passage header
424  DF  .~.~.~ Multi-way valve
425  DF  .~.~.~.~ Backwash
426  DF  .~.~.~.~.~ Encased
427  DF  .~.~.~ Backwash
428  DF  .~.~ Combining or dividing flow passages with filter in combined passage
429  DF  .~.~ Filter coaxial with valve seat or valve stem
430  DF  .~.~.~ Filter surrounds valve
431  DF  .~.~.~ Filter fixed to valve seat, opposed to valve head
432  DF  .~.~ Filter in valve body recess
433.1  DF  .~ Divided filtered, and unfiltered liquid passages
434  DF  .~.~ Recombining
435  DF  .~ Within flow line or flow line connected close casing
436  DF  .~.~ Vented
437  DF  .~.~ Central internal liquid receiver, e.g., tube
438  DF  .~.~.~ Imperforate central liquid tube
439  DF  .~.~.~.~ Axial flow through filter element
440  DF  .~.~.~ Inlet and outlet at same end
441  DF  .~.~.~ Attached to casing
442  DF  .~.~.~.~ Head and base connected
443  DF  .~.~ Inlet and outlet at same end
444  DF  .~.~.~ Filter suspended from head
445  DF  .~.~ Clamped in casing joint
446  DF  .~.~ Axially aligned inlet and outlet
447  DF  .~.~.~ Laterally removable
448  DF  .~.~.~ Single open-end-type filter element
449  DF  .~.~.~ Pipe end attached closed casing, e.g., faucet
450  DF  .~.~ Gasket within casing or spaced removable end members
451  DF  .~.~ Internal fixed shoulder supporting filter element
452  DF  .~.~.~ Single open-end-type filter element
453  DF  .~.~ Filter element clamped between closure and end wall
454  DF  .~.~ Filter element attached to closure
455  DF  .~ Receptacle and modified spacing surface or support for filter medium
456  DF  .~ Prefilt flow distributor or diverter
457  DF  .~ With central pervious tubular receiver
458  DF  .~.~ Plural concentric receivers
459  DF  .~ Pipe or plate attached type
460  DF  .~.~ Attached to open end of pipe
461  DF  .~.~.~ Spaced wall-type element
462  DF  .~.~.~ Pipe is connection to plate
463  DF  .~.~.~ Inserted holder
464  DF  .~ Portable receptacle draining type
465  DF  .~.~ Cooperating handles on receptacle and drainer
466  DF  .~.~ Receptacle spout
467  DF  .~.~.~ Within receptacle proper
468  DF  .~.~.~ Spaced from spout discharge
469  DF  .~.~ On or adjacent receptacle upper edge
470  DF  .~ Handled
471  DF  .~.~ Ring type
472  DF  .~ Vented
473  DF  .~ Resting on supporting receiver, e.g., portable
474  DF  .~.~ At upper edge of filtrate receiver
475  DF  .~.~.~ Filter offset in cover
476  DF  .~.~.~ Telescoped receivers or receiver sections
477  DF  .~.~ Resting on internal stop or surface
478  DF  .~.~.~ Unitary filter medium and radially expandable retainer
479  DF  .~.~.~ Inner separate retainer
480  DF  .~.~.~.~ With contractor for expandable retainer
481  DF  .~.~.~ Longitudinal retainer or guide, (e.g., reflex coffee maker)
482  DF  .~.~ At lower end or prefilt receiver
483  DF  .~ Supported, shaped or superimposed formed mediums
484  DF  .~.~ Medium within foraminous supporting container or sheath
485  DF  .~.~ External cage-type support
486  DF  .~.~ Spaced wall type, e.g., hollow leaf
487  DF  .~.~.~ Concentric, convolute or pleated
488  DF  .~.~ Abutted or superimposed members
489  DF  .~.~.~ For series flow
490  DF  .~.~.~.~ Integral or coated layers
491  DF  .~.~.~.~.~ All fibrous
492  DF  .~.~.~ Alternating dissimilar
493.1  DF  .~.~ Pleated
493.2  DF  .~.~.~ Bonded end caps
493.3  DF  .~.~.~ Rectangularly shaped
493.4  DF  .~.~.~ Spirally formed
493.5  DF  .~.~.~ Filter element
494.1  DF  .~.~ Convolute
494.2  DF  .~.~.~ Metal
494.3  DF  .~.~.~ With edge spacer
495  DF  .~.~ Single ring or closed frame type
496  DF  .~.~ Bound, fused or matted, e.g., porous shapes, sponges, etc.
497.01  DF  .~.~ Cylindrical, conical, or trough shape
497.1  DF  .~.~.~ Helically wound
497.2  DF  .~.~.~ Filter blank
497.3  DF  .~.~.~ Conical
498  DF  .~.~ Perforated or grooved plates
499  DF  .~.~ Screens, e.g., woven
500.1  DF  .~ Material
500.21  DF  .~.~ Semipermeable membrane
500.22  DF  .~.~.~ Isotropically pored
500.23  DF  .~.~.~ Hollow fiber or cylinder
500.24  DF  .~.~.~ Antithrombogenic coating or membrane
500.25  DF  .~.~.~ Metal containing
500.26  DF  .~.~.~ Glass
500.27  DF  .~.~.~ Organic
500.28  DF  .~.~.~.~ Cyclic
500.29  DF  .~.~.~.~.~ Cellulosic
500.3  DD  .~.~.~.~.~.~ Cellulose acetate
500.31  DF  .~.~.~.~.~.~.~ Cellulose diacetate
500.32  DF  .~.~.~.~.~.~.~ Cellulose triacetate
500.33  DF  .~.~.~.~.~ Homocyclic
500.34  DF  .~.~.~.~.~.~ Styrene
500.35  DF  .~.~.~.~ Acrylate
500.36  DF  .~.~.~.~ Alkene other than vinyl
500.37  DF  .~.~.~.~ Amine
500.38  DF  .~.~.~.~.~ Amide
500.39  DF  .~.~.~.~.~.~ Imide
500.4  DD  .~.~.~.~ Carbonate
500.41  DF  .~.~.~.~ Sulfone
500.42  DF  .~.~.~.~ Vinyl
500.43  DF  .~.~.~.~.~ Acrylonitrile
501  DF  .~.~ Sterilizing or neutralizing agent containing
502.1  DF  .~.~ Sorptive component containing
503  DF  .~.~ Diverse granular or fibrous
504  DF  .~.~.~ With adhered coating or impregnant
505  DF  .~.~.~ Including fibers
506  DF  .~.~ Coated or impregnated, e.g., adhesively bound
507  DF  .~.~.~ Fabrics
508  DF  .~.~.~ Fibrous
509  DF  .~.~.~.~ Inorganic
510.1  DF  .~.~ Porous unitary mass
511  DF  LIQUID AS SEPARATING MEDIUM
512.1  DF  TANGENTIAL FLOW OR CENTRIFUGAL FLUID ACTION
512.2  DF  .~ Multiple cyclone
512.3  DF  .~ With movable means affecting flow
513  DF  GRAVITATIONAL SEPARATOR
514  DF  .~ Portable invertible, e.g., milk and cream separator
515  DF  .~.~ Selective withdrawal of constituents
516  DF  .~.~ Resilient deformable isolator
517  DF  .~.~.~ Hinged to handle
518  DF  .~.~ Sectional isolator
519  DF  .~ Material supply distributor
520  DF  .~.~ Rotatable
521  DF  .~ Superposed compartments or baffles, e.g., parallel plate type
522  DF  .~.~ Each with lighter constituent discharge
523  DF  .~ Mechanical constituent mover
524  DF  .~.~ Diverse serial
525  DF  .~.~ Scum sediment removal
526  DF  .~.~ Endless belt or chain
527  DF  .~.~ Rectilinearly movable supporting means
528  DF  .~.~ Horizontally rotating scraper
529  DF  .~.~.~ Polygonal container and correlating mover
530  DF  .~.~.~ Tank rim-supported carriage
531  DF  .~.~.~ Elevatable scrapers
532.1  DF  .~ Heavier constituent trap, chamber, or recess
532.2  DF  .~.~ Septic tank
533  DF  .~.~ Closure or valve controlled discharge
534  DF  .~.~.~ In sloping recess
535  DF  .~.~.~.~ Downstream of separator
536  DF  .~.~.~ In side wall of separator
537  DF  .~.~.~ With discharge means for two or more lighter constituents
538  DF  .~ Lighter constituent trap
539  DF  .~.~ Gas vent or bypass
540  DF  .~.~ With discharge port
541  DF  ADJUNCTS
542  DF  MISCELLANEOUS
******************************
CROSS-REFERENCE ART COLLECTIONS
******************************
900  DF  ULTRA PURE WATER (E.G., CONDUCTIVITY WATER)
901  DF  SPECIFIED LAND FILL FEATURE (E.G., PREVENTION OF GROUND WATER FOULING)
902  DF  MATERIALS REMOVED
903  DF  .~ Nitrogenous
904  DF  .~.~ -CN containing
905  DF  .~.~ Protein
906  DF  .~ Phosphorus containing
907  DF  .~.~ Phosphate slimes
908  DF  .~ Organic
909  DF  .~.~ Aromatic compound (e.g., PCB, phenol, etc.)
910  DF  .~.~ Nonbiodegradable surfacant
911  DF  .~ Cumulative poison
912  DF  .~.~ Heavy metal
913  DF  .~.~.~ Chromium
914  DF  .~.~.~ Mercury
915  DF  .~ Fluorine containing
916  DF  .~ Odor (including control or abatement)
917  DF  .~ Color
918  DF  MISCELLANEOUS SPECIFIC TECHNIQUES
919  DF  .~ Using combined systems by merging parallel diverse waste systems
920  DF  .~ Using combined systems of sequential local and regional or municipal sewage systems
921  DF  .~ Flow equalization or time controlled stages or cycles
922  DF  .~ Oil spill cleanup (e.g., bacterial, etc.)
923  DF  .~.~ Using mechanical means (e.g., skimmers, pump, etc.)
924  DF  .~.~ Using physical agent (e.g., sponge, mop, etc.)
925  DF  .~.~ Using chemical agent
926  DF  .~ Using oxidation ditch (e.g., carousel, etc.)
928  DF  PAPER MILL WASTE (E.G., WHITE WATER, BLACK LIQUOR, ETC.) TREATED
929  DF  HEMOULTRAFILTRATE VOLUME MEASUREMENT OR CONTROL PROCESSES
930  DF  PAINT DETACKIFYING
******************************
DIGESTS
******************************
DIG 3  DD  Belt alignment
DIG 5  DD  Coalescer
DIG 6  DD  Dehydrators
DIG 7  DD  Drier blocks
DIG 8  DD  Fat fryer
DIG 9  DD  Floating cover
DIG 13  DD  Part flow-full flow
DIG 17  DD  Twist-on