US Patent Class 261
GAS AND LIQUID CONTACT APPARATUS-- Main Headings



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Current as of: June, 1999
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CLASS NOTES
1  DF  MISCELLANEOUS
2  DF  WITH LIQUID SEPARATIONS {4}
127  DF  WITH EXTERNAL SUPPLY OR REMOVAL OF HEAT {14}
158  DF  INDIRECT INTERCHANGE OR HEAT BETWEEN CONTACT FLUIDS {1}
16  DF  MULTIPLE GAS {1}
18.1  DF  MULTIPLE DIVERSE LIQUIDS {3}
19  DF  FLUID DISTRIBUTION {5}
75  DF  CONTACT DEVICES {11}
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DIGESTS
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DIG 1  DF  Auxiliary air inlet carburetors
DIG 2  DF  Airplane
DIG 3  DF  Air cooling
DIG 4  DF  Auto humidifiers
DIG 6  DF  Backfire
DIG 7  DF  Carbonators
DIG 8  DF  Carburetor primers
DIG 9  DF  Furnace gas scrubbers
DIG 10  DF  Steam heaters and condensers
DIG 11  DF  Cooling towers
DIG 12  DF  Carburetor venturi
DIG 13  DF  Desuperheaters
DIG 14  DF  Display stands
DIG 15  DF  Duct humidifiers
DIG 16  DF  Cream whipping
DIG 17  DF  Odorizers
DIG 18  DF  Dashpots
DIG 19  DF  Degassers
DIG 20  DF  Deicers for carburetors
DIG 21  DF  Drawing excess fuel from carbureting passage
DIG 22  DF  Faucet aerators
DIG 23  DF  Fuel feeding valves
DIG 24  DF  Fuel feeding valve retaining
DIG 25  DF  Fuel spread out into a film
DIG 26  DF  Foam
DIG 27  DF  Gas circulated in circuit
DIG 28  DF  Blood oxygenators
DIG 29  DF  Heaters submerged in liquid
DIG 30  DF  Tray heaters
DIG 31  DF  Heaters
DIG 32  DF  Heaters and condensers
DIG 33  DF  Heaters, spray
DIG 34  DF  Automatic humidity regulation
DIG 35  DF  Air line lubricators
DIG 36  DF  Carburetor manifolds
DIG 37  DF  Modern pumps diaphragm
DIG 38  DF  Needle valves
DIG 39  DF  Liquid feeding nozzles
DIG 40  DF  Oil filter for fuel entering nozzles or float chamber
DIG 41  DF  Pad retaining means in humidifiers and air conditioners
DIG 42  DF  Ozonizers
DIG 43  DF  Air coolers
DIG 44  DF  Overflow trough
DIG 45  DF  Processes carburetors
DIG 46  DF  Residue prevention in humidifiers and air conditioners
DIG 47  DF  Swing diffusers
DIG 48  DF  Sonic vibrators
DIG 49  DF  Suction operated feed valve
DIG 50  DF  Surge prevention in carburetors
DIG 51  DF  Carburetors with supercharging blowers
DIG 52  DF  Carburetor with valves
DIG 53  DF  Valve actuation
DIG 54  DF  Venturi scrubbers
DIG 55  DF  Reatomizers
DIG 56  DF  Variable venturi
DIG 57  DF  Interchangeable chore tube
DIG 58  DF  Choke tube having plurality of leaves
DIG 59  DF  Choke tube leaves flexible
DIG 60  DF  Duplex barrels
DIG 61  DF  Longitudinally reciprocating choke tube (along air passage)
DIG 62  DF  Longitudinally reciprocating choke tube having movable parts
DIG 63  DF  Longitudinally reciprocating choke tube, throttle-operated
DIG 64  DF  Longitudinally reciprocating choke tube, suction-operated
DIG 65  DF  Vaporizers
DIG 66  DF  Water injection to prevent detonation
DIG 67  DF  Carburetors with vented bowl
DIG 68  DF  Diaphragm-controlled inlet valve
DIG 69  DF  Fluid amplifiers in carburetors
DIG 70  DF  Sewage aerators; diffusers
DIG 71  DF  Sewage aerators; rotating
DIG 72  DF  Packing elements
DIG 73  DF  Carburetor primers; ticklers
DIG 74  DF  Valve actuation; electrical
DIG 75  DF  Flowing liquid aspirates gas
DIG 76  DF  Steam
DIG 77  DF  Plume abatement
DIG 78  DF  Sonic flow
DIG 79  DF  Cooling ponds
DIG 80  DF  Electrical treatment
DIG 81  DF  Percolation control
DIG 82  DF  Upper end injectors
DIG 83  DF  Fuel vapor generation
DIG 84  DF  Tamperproof
DIG 85  DF  Droplet catchers
DIG 86  DF  Cooling tower ice prevention
DIG 87  DF  Cooling tower power generators