| Class 202 | DISTILLATION: APPARATUS |
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![[List of Pre Grant Publications for class 202 subclass 81]](../as.gif) | ![[List of Patents for class 202 subclass 81]](../ps.gif) | 81 | APPARATUS |
| | 82 |  Systems |
| | 83 |  Portably mounted |
| | 84 | Separatory and thermolytic |
| | 85 | Thermolytic and autothermic |
| | 91 | Autothermic |
| | 96 | Thermolytic |
| | 97 |  Stalls |
| | 99 | Directly heated chamber |
| | 101 | Dome ovens |
| | 102 | Hearths |
| | 105 | Retort |
| | 106 |  With steam generation |
| | 107 | With digester |
| | 108 | With direct heating |
| | 109 | With cyclic volatile circulation |
| | 110 | With distilland pressure |
| | 111 | With recuperators and regenerators |
| | 112 | With distillate fixing chamber |
| | 113 | Plural |
| | 117 | Conveying |
| | 120 | Vertical |
| | 128 | Inclined |
| | 133 | Horizontal |
| | 134 |  With fluid injection to retort |
| | 135 | Plural gas and/or air admission |
| | 136 | Rotary |
| | 137 | With heating chamber |
| | 138 | With flues |
| | 147 | Gas bench |
| | 150 | Preheating |
| | 151 | Combustion control devices |
| | 152 | Separatory |
| | 153 | Still and column |
| | 158 | Column |
| | 159 | With preheater |
| | 160 | Automatic temperature and/or pressure control |
| | 161 | Partial reflux condenser |
| | 162 | Vapor-element by-pass |
| | 163 | Still |
| | 164 | Recovery from containers |
| | 165 | Still and stove |
| | 166 | Still and stand boiler |
| | 167 | Still and feed-water heater |
| | 168 | Still and extractor |
| | 170 | Still extractor |
| | 172 | Plural |
| | 175 | With agitator |
| | 176 | With distilland treating devices |
| | 182 | With vapor-treating devices |
| | 183 | Still and absorber |
| | 185.1 | Condenser |
| | 185.2 |  Direct contact |
| | 185.3 | Air condensers |
| | 185.4 | Circulating coolant in cap or top closure |
| | 185.5 | Helical coil for vapor stream |
| | 185.6 | Helical coil for coolant |
| | 186 | Plural |
| | 187 | Concentric with still |
| | 188 | Still supporting |
| | 189 | Still supported |
| | 195 | Still feeding |
| | 197 | With separator |
| | 198 | Dephlegmator |
| | 199 | Doubler |
| | 200 | Filter |
| | 201 | Aerator |
| | 202 | With condensate-treating devices |
| | 205 | Vacuum |
| | 206 | Automatic heat control |
| Types |
| Separatory and thermolytic |
| Autothermic |
| | 210 | Heap |
| | 211 | Kiln |
| | 215 | Directly heated chamber |
| | 217 | Retort |
| | 218 | Rotary and/or tilting |
| | 219 | Molten bath |
| | 220 | Flued |
| | 221 | Vertical |
| | 222 | Structural features |
| | 226 | Residue treatment |
| | 227 | Quencher |
| Separatory |
| | 239 | Elements |
| | 241 | Cleaning and decarbonizing |
| | 242 | Closures |
| | 254 | Offtakes |
| | 262 | Feeding and discharging |
| | 264 | Foam control |
| | 265 | Agitating |
| | 266 | Distilland supports and containers |
| | 267.1 | Materials of construction |
| | 268 | Expansion provisions |
| | 269 | Air and gas seals |
| | 270 | Accessories and details |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| DIGESTS | ||
| | DIG1 | SCALE PROBLEMS DIGEST |