US Patent Class 159
CONCENTRATING EVAPORATORS



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Current as of: June, 1999
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  DF  CLASS NOTES
2.1  DF  SUPERHEATING AND PRESSURE RELEASE
2.2  DF  .~ With extruder
2.3  DF  .~.~ Multistage
3  DF  SPRAY TYPE
4.01  DF  .~ Gaseous current
4.02  DF  .~.~ Combustion product gas
4.03  DF  .~.~ Antibridging
4.04  DF  .~.~ Countercurrent
4.05  DF  .~.~ Intermediate gas outlet or inlet
4.06  DF  .~.~ Bottom sprayer
4.07  DF  .~.~ Horizontial sprayer
4.08  DF  .~.~ Impinging jets
4.09  DF  .~.~ Multistaging
4.1  DF  .~.~ Heat recovery
4.2  DF  .~.~ Spinning sprayer
4.3  DF  .~.~ Rotary drum with sprayer
4.4  DF  .~.~ Steam drying or atomizing
5  DF  FILM TYPE
6.1  DF  .~ Centrifugal
6.2  DF  .~.~ Wiped film
6.3  DF  .~.~.~ Horizontally
7  DF  .~ Moving-film support
8  DF  .~.~ Gaseous current
9.1  DF  .~.~.~ Rotary drum or disk
9.2  DF  .~.~.~.~ Treated material inside drum
10  DF  .~.~.~.~ Exterior surface
11.1  DF  .~ Rotary drum or disk
11.2  DF  .~.~ Internal film
11.3  DF  .~.~.~ Rotary disk
12  DF  .~.~ Inclosing chamber
13.1  DF  .~ Moving film
13.2  DF  .~.~ Contacting tube
13.3  DF  .~.~.~ Outside of tube
13.4  DF  .~.~ With gas wiping
14  DF  .~.~ Climbing
15  DF  .~.~ Zigzag
16.1  DF  GASEOUS BLAST OR CURRENT
16.2  DF  .~ Submerged combustion
16.3  DF  .~ Steam injection
17.1  DF  MULTIPLE EFFECTS
17.2  DF  .~ Parallel fluid flow
17.3  DF  .~ Variant multistaging
17.4  DF  .~ Contiguous evaporators
18  DF  .~ Superimposed
19  DF  .~ Combined closed and open
20.1  DF  .~ Variable or counterflow
20.2  DF  .~.~ With effect switching means
21  DF  COMBINED CLOSED AND OPEN PANS
22  DF  CLOSED EVAPORATING CHAMBERS
23  DF  .~ Indirectly heated
24.1  DF  .~.~ Regenerative
24.2  DF  .~.~.~ Heat recovery or regeneration
24.3  DF  .~.~.~.~ Thermocompression
25.1  DF  .~.~ Rotatable agitator or coil
25.2  DF  .~.~.~ Vertical axis agitator
26.1  DF  .~.~ Heated tube
26.2  DF  .~.~.~ Inclined
27.1  DF  .~.~.~ Vertical
27.2  DF  .~.~.~.~ Detached separator
27.3  DF  .~.~.~.~ Multieffect in one casing
27.4  DF  .~.~.~.~ Downflow
27.5  DF  .~.~.~.~ Floating calandria
28.1  DF  .~.~ Heating elements
28.2  DF  .~.~.~ Baffled
28.3  DF  .~.~.~ Spur tubes
28.4  DF  .~.~.~ Coils
28.5  DF  .~.~.~ Tubular inserts
28.6  DF  .~.~.~ Plate-type evaporator
29  DF  .~ Directly heated
30  DF  .~ Samplers
31  DF  .~ Liquid traps or separators
32  DF  OPEN PANS
33  DF  .~ With rakes
34  DF  .~ Tiltable, removable, or portable
35  DF  .~ Interposed liquid receptacle
36  DF  .~ Steam and furnace heated
37  DF  .~ Steam heated
38  DF  .~ Furnace heated
39  DF  .~.~ Liquid tubes in flue
40  DF  .~.~ Flues in pan
41  DF  .~.~ With dampers
42  DF  STRAINERS OR SKIMMERS
43.1  DF  FLUID FEED OR DISCHARGE DEVICES
43.2  DF  .~ With alternating operating means
44  DF  .~ Automatic
45  DF  APPARATUS FOR GRAINING AND SEPARATING CRYSTALS
46  DF  PRELIMINARY HEATERS AND HEAT ECONOMIZERS
47.1  DF  PROCESSES
47.2  DF  .~ Involving urea
47.3  DF  .~ Involving waste liquid
48.1  DF  .~ Spraying
48.2  DF  .~.~ Producing liquid product
49  DF  .~ Film
1.1  DF  MISCELLANEOUS
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CROSS-REFERENCE ART COLLECTIONS
******************************
900  DF  USING VIBRATORY FORCE
901  DF  PROMOTING CIRCULATION
902  DF  USING NATURAL HEAT
903  DF  .~ Solar
904  DF  .~.~ Floating solar still
905  DF  SEWAGE TREATMENT
906  DF  WICK
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DIGESTS
******************************
DIG 1  DD  Electric heat
DIG 2  DD  Entrainment
DIG 3  DD  Fluidized bed
DIG 4  DD  Foam
DIG 5  DD  Freezing
DIG 6  DD  Infrared
DIG 7  DD  Magnetic coupling
DIG 8  DD  Multieffect or multistage
DIG 9  DD  Two liquids dried simultaneously
DIG 10  DD  Organic
DIG 11  DD  Biologicals
DIG 12  DD  Radioactive
DIG 13  DD  Scale
DIG 14  DD  Soap
DIG 15  DD  Special material
DIG 16  DD  Vacuum
DIG 17  DD  Two liquids
DIG 18  DD  Accumulator
DIG 19  DD  Acid
DIG 20  DD  Additive
DIG 21  DD  Coating
DIG 22  DD  Condensate flashing
DIG 23  DD  Cooling
DIG 24  DD  Critical
DIG 25  DD  Decant, press, centrifuge
DIG 26  DD  Electric field
DIG 27  DD  Micropores
DIG 28  DD  Porous member
DIG 29  DD  Pebble bed
DIG 30  DD  Desuper heating
DIG 31  DD  Deaeration
DIG 32  DD  Indirect heat exchange
DIG 33  DD  Two liquids, one a heat carrier
DIG 34  DD  Caustic
DIG 35  DD  Viewports, peepsights, and sightglasses
DIG 36  DD  Rabbled hearth
DIG 37  DD  Ported
DIG 38  DD  Seed
DIG 39  DD  Power plant
DIG 40  DD  Pumps
DIG 41  DD  Removable units
DIG 42  DD  Seals