| Class 261 | GAS AND LIQUID CONTACT APPARATUS |
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![[List of Pre Grant Publications for class 261 subclass 1]](../as.gif) | ![[List of Patents for class 261 subclass 1]](../ps.gif) | 1 | MISCELLANEOUS |
| | 2 | WITH LIQUID SEPARATIONS |
| | 127 | WITH EXTERNAL SUPPLY OR REMOVAL OF HEAT |
| | 128 |  Processes |
| | 129 | Temperature or humidity sensor |
| | 131 | Automatic control of heat supply or heat effect |
| | 133 | With mixer for supplementary gas and gaseous contactor product |
| | 135 | With indicator or tester |
| | 136 | Combined |
| | 137 | Interconnected heat supply and contact fluid flow controllers |
| | 138 | Diverse heat supply or removal means |
| | 140.1 | Refrigeration producer |
| | 141 | Heat producer |
| | 146 | Plural distinct contact zones |
| | 150 | Heat exchange means in one of plural liquid feed paths |
| | 151 | Recirculating fluid |
| | 152 | Heat exchange means at or downstream of contact zone |
| | 158 | INDIRECT INTERCHANGE OR HEAT BETWEEN CONTACT FLUIDS |
| | 16 | MULTIPLE GAS |
| | 18.1 | MULTIPLE DIVERSE LIQUIDS |
| | 19 | FLUID DISTRIBUTION |
| | 20 | Systems |
| | 24 | Pumping |
| | 38 | Valved |
| | 39.1 |  Thermostatic |
| | 39.2 |  With carburetor expansible fluid actuating means |
| | 39.3 | With carburetor bimetallic actuating means |
| | 39.4 | Carburetor spring linkage with temperature element |
| | 39.5 | Without carburetor choke means |
| | 39.6 | With carburetor electrical heater |
| | 40 | Multiple jet |
| | 42 | Multiple valves |
| | 43 | Connected |
| | 44.1 |  Contact space |
| | 44.2 |  Contact valve with hollow shaft supplying liquid |
| | 44.3 | Traversely reciprocating air or mixture valve |
| | 44.5 | Longitudinally movable air or mixture valve |
| | 44.6 | Rotating air or mixture valve |
| | 44.9 | Variable-shape passage |
| | 45 | Gas by-pass |
| | 49 | Liquid inlet |
| | 52 | Gas inlet and outlet |
| | 53 | Contact space |
| | 54 | Gas by-pass |
| | 58 | Liquid inlet |
| | 61 | Gas inlet and outlet |
| | 62 | Contact space |
| | 63 | Gas by-pass |
| | 64.1 | Gas inlet |
| | 64.2 | Anterior throttle |
| | 64.3 | Pressure control |
| | 64.4 | Suction operated |
| | 64.5 | Float control |
| | 64.6 | Starting choke |
| | 65 | Gas outlet |
| | 66 | Liquid inlet |
| | 72.1 | Liquid supply tank |
| | 74 | Contact receptacle |
| | 75 | CONTACT DEVICES |
| | 76 | Injector type |
| | 78.1 | Atomizer type |
| | 79.1 | Rotating gases |
| | 80 | Traveling strip |
| | 81 | Reciprocating |
| | 83 | Rotating |
| | 94 | Porous mass |
| | 100 | Porous sheet |
| | 108 | Wet baffle |
| | 115 | Liquid spray |
| | 119.1 | Liquid tank |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| DIGESTS | ||
| | DIG1 | AUXILIARY AIR INLET CARBURETORS |
| | DIG2 | AIRPLANE |
| | DIG3 | AIR COOLING |
| | DIG4 | AUTO HUMIDIFIERS |
| | DIG6 | BACKFIRE |
| | DIG7 | CARBONATORS |
| | DIG8 | CARBURETOR PRIMERS |
| | DIG9 | FURNACE GAS SCRUBBERS |
| | DIG10 | STEAM HEATERS AND CONDENSERS |
| | DIG11 | COOLING TOWERS |
| | DIG12 | CARBURETOR VENTURI |
| | DIG13 | DESUPERHEATERS |
| | DIG14 | DISPLAY STANDS |
| | DIG15 | DUCT HUMIDIFIERS |
| | DIG16 | CREAM WHIPPING |
| | DIG17 | ODORIZERS |
| | DIG18 | DASHPOTS |
| | DIG19 | DEGASSERS |
| | DIG20 | DEICERS FOR CARBURETORS |
| | DIG21 | DRAWING EXCESS FUEL FROM CARBURETING PASSAGE |
| | DIG22 | FAUCET AERATORS |
| | DIG23 | FUEL FEEDING VALVES |
| | DIG24 | FUEL FEEDING VALVE RETAINING |
| | DIG25 | FUEL SPREAD OUT INTO A FILM |
| | DIG26 | FOAM |
| | DIG27 | GAS CIRCULATED IN CIRCUIT |
| | DIG28 | BLOOD OXYGENATORS |
| | DIG29 | HEATERS SUBMERGED IN LIQUID |
| | DIG30 | TRAY HEATERS |
| | DIG31 | HEATERS |
| | DIG32 | HEATERS AND CONDENSERS |
| | DIG33 | HEATERS, SPRAY |
| | DIG34 | AUTOMATIC HUMIDITY REGULATION |
| | DIG35 | AIR LINE LUBRICATORS |
| | DIG36 | CARBURETOR MANIFOLDS |
| | DIG37 | MODERN PUMPS DIAPHRAGM |
| | DIG38 | NEEDLE VALVES |
| | DIG39 | LIQUID FEEDING NOZZLES |
| | DIG40 | OIL FILTER FOR FUEL ENTERING NOZZLES OR FLOAT CHAMBER |
| | DIG41 | PAD RETAINING MEANS IN HUMIDIFIERS AND AIR CONDITIONERS |
| | DIG42 | OZONIZERS |
| | DIG43 | AIR COOLERS |
| | DIG44 | OVERFLOW TROUGH |
| | DIG45 | PROCESSES CARBURETORS |
| | DIG46 | RESIDUE PREVENTION IN HUMIDIFIERS AND AIR CONDITIONERS |
| | DIG47 | SWING DIFFUSERS |
| | DIG48 | SONIC VIBRATORS |
| | DIG49 | SUCTION OPERATED FEED VALVE |
| | DIG50 | SURGE PREVENTION IN CARBURETORS |
| | DIG51 | CARBURETORS WITH SUPERCHARGING BLOWERS |
| | DIG52 | CARBURETOR WITH VALVES |
| | DIG53 | VALVE ACTUATION |
| | DIG54 | VENTURI SCRUBBERS |
| | DIG55 | REATOMIZERS |
| | DIG56 | VARIABLE VENTURI |
| | DIG57 | INTERCHANGEABLE CHORE TUBE |
| | DIG58 | CHOKE TUBE HAVING PLURALITY OF LEAVES |
| | DIG59 | CHOKE TUBE LEAVES FLEXIBLE |
| | DIG60 | DUPLEX BARRELS |
| | DIG61 | LONGITUDINALLY RECIPROCATING CHOKE TUBE (ALONG AIR PASSAGE) |
| | DIG62 | LONGITUDINALLY RECIPROCATING CHOKE TUBE HAVING MOVABLE PARTS |
| | DIG63 | LONGITUDINALLY RECIPROCATING CHOKE TUBE, THROTTLE-OPERATED |
| | DIG64 | LONGITUDINALLY RECIPROCATING CHOKE TUBE, SUCTION-OPERATED |
| | DIG65 | VAPORIZERS |
| | DIG66 | WATER INJECTION TO PREVENT DETONATION |
| | DIG67 | CARBURETORS WITH VENTED BOWL |
| | DIG68 | DIAPHRAGM-CONTROLLED INLET VALVE |
| | DIG69 | FLUID AMPLIFIERS IN CARBURETORS |
| | DIG70 | SEWAGE AERATORS; DIFFUSERS |
| | DIG71 | SEWAGE AERATORS; ROTATING |
| | DIG72 | PACKING ELEMENTS |
| | DIG73 | CARBURETOR PRIMERS; TICKLERS |
| | DIG74 | VALVE ACTUATION; ELECTRICAL |
| | DIG75 | FLOWING LIQUID ASPIRATES GAS |
| | DIG76 | STEAM |
| | DIG77 | PLUME ABATEMENT |
| | DIG78 | SONIC FLOW |
| | DIG79 | COOLING PONDS |
| | DIG80 | ELECTRICAL TREATMENT |
| | DIG81 | PERCOLATION CONTROL |
| | DIG82 | UPPER END INJECTORS |
| | DIG83 | FUEL VAPOR GENERATION |
| | DIG84 | TAMPERPROOF |
| | DIG85 | DROPLET CATCHERS |
| | DIG86 | COOLING TOWER ICE PREVENTION |
| | DIG87 | COOLING TOWER POWER GENERATORS |
| | DIG88 | AROMA DISPENSERS |