US Patent Class 196
MINERAL OILS: APPARATUS



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Current as of: June, 1999
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  DF  CLASS NOTES
14.5  DF  DEWAXING
14.52  DF  SOLVENT EXTRACTION
46  DF  REFINING
46.1  DF  .~ With filtration
98  DF  COMBINED VAPORIZING AND CONDENSING
99  DF  .~ Condensate returned to vaporizer
100  DF  .~.~ Columns
102  DF  .~ Condenser or collector in vaporizer
103  DF  .~ Heads
104  DF  VAPORIZING
105  DF  .~ Systems
106  DF  .~.~ Series stills
107  DF  .~ Tube and drum
108  DF  .~.~ Cyclic circulation
109  DF  .~.~.~ Drum above tube
110  DF  .~ Tubular
111  DF  .~ With partitions
112  DF  .~ Rotary
114  DF  .~ Vacuum
115  DF  .~ Special shapes
116  DF  .~ Furnaces and flues
117  DF  .~.~ Internal flues
118  DF  .~ Liquid baths
119  DF  .~ Jackets
120  DF  .~ Special means for heating
121  DF  .~.~ Electric
122  DF  .~ Carbon removers
123  DF  .~ Circulators or agitators
124  DF  .~.~ Mechanical
125  DF  .~.~ Baffles
126  DF  .~.~ Fluid injectors
127  DF  .~ Fluid injectors
128  DF  .~ Films or sprays
129  DF  .~ Depending legs or spur tubes
130  DF  .~.~ Bottoms
131  DF  .~.~ Unheated
132  DF  .~ Automatic control
133  DF  .~ Special features of construction
134  DF  .~ Heat recovery from vapor or residuum
135  DF  .~ Feeders
136  DF  .~ Vapor outlets
137  DF  .~ Attachments
138  DF  CONDENSING
139  DF  .~ Dephlegmators or fractionating columns
140  DF  .~ Contact with cooling fluid
141  DF  .~ Automatically controlled temperature
155  DF  MISCELLANEOUS