| Class 203 | DISTILLATION: PROCESSES, SEPARATORY |
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![[List of Pre Grant Publications for class 203 subclass 1]](../as.gif) | ![[List of Patents for class 203 subclass 1]](../ps.gif) | 1 | WITH MEASURING, TESTING OR INSPECTING |
| | 4 | INCLUDING PURGING OF THE SYSTEM |
| | 5 | SEPARATING ISOTOPES OR TAUTOMERS |
| | 6 | ADDITION OF MATERIAL TO DISTILLAND TO INHIBIT OR PREVENT REACTION OR TO STABILIZE |
| | 7 |  For scale inhibiting or corrosion preventing |
| | 8 | For inhibiting or preventing a polymerization reaction |
| | 10 | WATER PURIFICATION ONLY |
| | 12 | DISTILLING TO SEPARATE OR REMOVE ONLY WATER |
| | 20 | INCLUDING DEFOAMING OR INHIBITING FOAM |
| | 21 | AND RECOVERING HEAT BY INDIRECT HEAT EXCHANGE |
| | 22 | Utilizing recovered heat for heating feed |
| | 25 | Utilizing recovered heat for heating the distillation zone |
| | 27 | Utilizing recovered heat in subsequent step in process |
| | 28 | WITH CHEMICAL REACTION |
| | 39 | WITH DISPARATE PHYSICAL SEPARATION |
| | 40 | Of entrained particles from a vapor or gas |
| | 41 | Utilizing solid sorbent |
| | 42 | Utilizing liquid sorption of component from gas or vapor |
| | 43 | Utilizing liquid-liquid extracting of distillation product |
| | 47 | Utilizing removing solid from liquid |
| | 49 | CONVECTIVE DISTILLATION WITH NORMALLY GASEOUS MEDIUM, E.G., AIR |
| | 50 | ADDING MATERIAL TO DISTILLAND EXCEPT WATER OR STEAM PER SE |
| | 51 | At least two materials |
| | 57 | Organic compound |
| | 71 | PLURAL DISTILLATIONS PERFORMED ON SAME MATERIAL |
| | 72 | One a filming distillation |
| | 73 | One a distillation under positive pressure or vacuum |
| | 74 |  Distillation of initial distillate |
| | 75 |  And return of distillation product to a previous distillation zone |
| | 76 | Including the addition of water or steam |
| | 77 | Initial distillation under positive pressure or vacuum |
| | 78 | And returning distillation product to a previous distillation zone |
| | 79 | Including the addition of water or steam |
| | 80 | Initial distillation under positive pressure or vacuum |
| | 81 | Distillation of initial distillate |
| | 82 | And returning distillation product to a previous distillation zone |
| | 83 | Including the addition of water or steam |
| | 84 | And returning distillation product to a previous distillation zone |
| | 85 | Including the addition of water or steam |
| | 86 | DISTILLATION IN APPARATUS OR ELEMENT OF SPECIFIC MATERIAL |
| | 87 | WITH FRACTIONAL CONDENSATION OF VAPOR OUTSIDE STILL |
| | 88 | FLASH VAPORIZATION OF DISTILLAND |
| | 89 | FILMING OF DISTILLAND FOR VAPORIZATION |
| | 90 | SPRAYING OF DISTILLAND INTO VAPORIZATION ZONE |
| | 91 | VAPORIZATION ZONE UNDER POSITIVE PRESSURE OR VACUUM |
| | 92 | Including the addition of water or steam |
| | 94 | And returning product of distillation step to distillation zone |
| | 95 | INCLUDING ADDITION OF WATER OR STEAM |
| | 98 | AND RETURNING PRODUCT OF DISTILLATION STEP TO DISTILLATION ZONE |
| | 99 | MISCELLANEOUS SEPARATORY |
| CROSS-REFERENCE ART COLLECTIONS | ||
| | 100 | PARTICULAR TYPE OF HEATING |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| DIGESTS | ||
| | DIG1 | SOLAR STILL |
| | DIG2 | LABORATORY DISTILLATION |
| | DIG3 | ACRYLONITRILE |
| | DIG4 | HEAT PUMP |
| | DIG5 | HUMAN WASTE |
| | DIG6 | REACTOR-DISTILLATION |
| | DIG7 | START UP OR SHUT DOWN |
| | DIG8 | WASTE HEAT |
| | DIG9 | PLURAL FEED |
| | DIG10 | VINYL ACETATE |
| | DIG11 | BATCH DISTILLATION |
| | DIG13 | SPIRITS |
| | DIG14 | EJECTOR-EDUCTOR |
| | DIG16 | COMBINATION |
| | DIG17 | SALINE WATER CONVERSION |
| | DIG18 | CONTROL |
| | DIG19 | SIDESTREAM |
| | DIG20 | POWER PLANT |
| | DIG21 | ACRYLIC ACID OR ESTER |
| | DIG22 | ACCESSORIES |
| | DIG23 | METHANOL |
| | DIG24 | MOBILE, MARINE DISTILLER |
| | DIG25 | NON-DISTILLING BOTTOMS TREATMENT |