PTO Manual of Classification for US patents

PTO Manual of Classification for US patents

What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.


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363-131 121-55A 14-.5
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Class Number: 261
 Class Title: GAS AND LIQUID CONTACT APPARATUS

Subclass  Subclass
Number    Title

  1       MISCELLANEOUS
  2       WITH LIQUID SEPARATIONS
  3       .In circuit
  4       .On inlet
  5       .Filtering
  6       ..Unitary structure
  7       .Decanting
  8       ..Unitary structure
  127     WITH EXTERNAL SUPPLY OR REMOVAL OF HEAT
  128     .Processes
  129     .Temperature or humidity sensor
  130     ..Heat supply or removal control
  131     .Automatic control of heat supply or heat effect
  133     .With mixer for supplementary gas and gaseous contactor product
  134     ..Pressure responsive supplementary gas supply means
  135     .With indicator or tester
  136     .Combined
  137     .Interconnected heat supply and contact fluid flow controllers
  138     .Diverse heat supply or removal means
  139     ..Electric heater
  140.1   .Refrigeration producer
  140.2   ..Absorption means
  141     .Heat producer
  142     ..Electric heater
  143     ..Means burning contact product
  144     ...Internal combustion engine
  145     ....Engine fuel supply means heated by exhaust manifold
  146     .Plural distinct contact zones
  147     ..Serially arranged in flow path
  148     ...Counter flowing gas and liquid (e.g., absorption or
              rectification column)
  149     ...Heat exchanger in flow path spaced from 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
  153     ..Gas exposed liquid body or sheet contacting heat exchanger
  154     ..Porous type gas-liquid contactor exposed to heat exchanger
  155     ..Contact fluid passage surrounds external fluid flow passage
  156     ..Fins or deflectors in contact fluid passage of heat exchanger
  157     ..With heat exchange means for feed fluid
  158     INDIRECT INTERCHANGE OR HEAT BETWEEN CONTACT FLUIDS
  159     .Incoming fluid exchanges heat
  160     ..With fluid at or downstream of contact zone
  161     ...Incoming exchanging fluid is feed gas
  16      MULTIPLE GAS
  17      .Furnace-gas type
  18.1    MULTIPLE DIVERSE LIQUIDS
  18.2    .Water added to charge
  18.3    .Multiple fuels
  18.4    .Antidetonant
  19      FLUID DISTRIBUTION
  20      .Systemss
  21      ..Series
  22      ...Gas connections
  23.1    ..Parallel
  23.2    ...Carburetors
  23.3    ....Stratified charge
  23.4    ....Rotary engine
  24      .Pumping
  25      ..Liquid operated
  26      ..Automatic control
  27      ...Liquid inlet
  28      ..Gas and liquid
  29      ...Liquid circuit
  30      ..Gas inlet
  31      ...Churn type
  32      ....Rotary dasher
  33      ....Reciprocating dasher
  34.1    ..Liquid
  34.2    ...Accelerator pump
  34.3    ....With thermostatic control
  35      ...Gas operated
  36.1    ...In circuit
  36.2    ....Carburetor
  37      ...Inlet
  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
  41.1    ...Progressive
  41.2    ....With parallel carbureting passages
  41.3    .....With control of plural passages
  41.4    ....Multiple jet manual control
  41.5    ....Bypass opening beyond throttle
  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
  44.4    ......Suction operated
  44.5    .....Longitudinally movable air or mixture valve
  44.6    .....Rotating air or mixture valve
  44.7    ......Off-center pivoted
  44.8    ......Cylinder or plug-valve type
  44.9    .....Variable-shape passage
  45      ....Gas by-pass
  46      .....With gas inlet
  47      .....With gas outlet
  48      .....With liquid inlet
  49      ....Liquid inlet
  50.1    .....With gas inlet
  50.2    ......Suction operated gas inlet valve
  50.3    ......Noncarburetor
  51      .....With gas outlet
  52      ....Gas inlet and outlet
  53      ...Contact spacee
  54      ...Gas by-pass
  55      ....With gas inlet
  56      ....With gas outlet
  57      ....With liquid inlet
  58      ...Liquid inlet
  59      ....With gas inlet
  60      ....With gas outlet
  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
  67      ...Plural
  68      ....Float and manual
  69.1    ...Gas pressure controlled
  69.2    ....Wet diaphragm
  70      ...Float controlled
  71      ...Manual
  72.1    .Liquid supply tank
  72.2    ..Aviation carburetor
  73      ..Barometric
  74      .Contact receptacle
  75      CONTACT DEVICES
  76      .Injector type
  77      ..Submerged blast
  78.1    .Atomizer type
  78.2    ..Noncarburetor
  79.1    .Rotating gases
  79.2    ..Noncarburetor
  80      .Traveling strip
  81      .Reciprocating
  82      ..Piston
  83      .Rotating
  84      ..Impeller
  85      ...Hollow shaft
  86      ....Gas trapping
  87      ....Gas delivering
  88      ....Liquid spraying
  89      ...Sprayed
  90      ....Horizontal axis
  91      ...Dipping
  92      ....Horizontal axis
  93      ...Submerged blast
  94      .Porous mass
  95      ..Surface contact
  96      ..Gas-flow control
  97      ..Liquid-flow control
  98      ...Spray
  99      ...Capillary feed
  100     .Porous sheet
  101     ..Surface contact
  102     ...Gas-flow controll
  103     ...Liquid downflow
  104     ...Capillary feed
  105     ..Gas-flow control
  106     ..Liquid downflow
  107     ..Capillary feed
  108     .Wet baffle
  109     ..Gas-flow control
  110     ..Liquid-flow control
  111     ...Spray
  112.1   ...Film
  112.2   ....Corrugated plates
  113     ..Perforated baffles
  114.1   ..Overflow baffles
  114.2   ...Bubble caps
  114.3   ...Jet plates
  114.4   ...Valve tray
  114.5   ...Tray construction
  115     .Liquid spray
  116     ..Aspirating
  117     ..Opposed
  118     ..Transverse
  119.1   .Liquid tank
  119.2   ..Carburetor
  120     ..Floating distributor
  121.1   ..Submerged blast
  121.2   ...Minnow bucket
  121.3   ...Carburetor vented nozzle
  121.4   ....Air inlet valve
  122.1   ...Submerged screen
  122.2   ....With closable apertures
  123     ...Submerged baffle
  124     ...Multiple jet
  125     ..Multiple receptacle
  126     ..Upflowing gases
  *       *****************************
  *       DIGESTS
  *       *****************************
  DIG 1   Auxiliary air inlet carburetors
  DIG 2   Airplane
  DIG 3   Air cooling
  DIG 4   Auto humidifiers
  DIG 6   Backfire
  DIG 7   Carbonators
  DIG 8   Carburetor primers
  DIG 9   Furnace gas scrubbers
  DIG 10  Steam heaters and condensers
  DIG 11  Cooling towers
  DIG 12  Carburetor venturi
  DIG 13  Desuperheaters
  DIG 14  Display stands
  DIG 15  Duct humidifiers
  DIG 16  Cream whipping
  DIG 17  Odorizers
  DIG 18  Dashpots
  DIG 19  Degassers
  DIG 20  Deicers for carburetors
  DIG 21  Drawing excess fuel from carbureting passage
  DIG 22  Faucet aeratorss
  DIG 23  Fuel feeding valves
  DIG 24  Fuel feeding valve retaining
  DIG 25  Fuel spread out into a film
  DIG 26  Foam
  DIG 27  Gas circulated in circuit
  DIG 28  Blood oxygenators
  DIG 29  Heaters submerged in liquid
  DIG 30  Tray heaters
  DIG 31  Heaters
  DIG 32  Heaters and condensers
  DIG 33  Heaters, spray
  DIG 34  Automatic humidity regulation
  DIG 35  Air line lubricators
  DIG 36  Carburetor manifolds
  DIG 37  Modern pumps diaphragm
  DIG 38  Needle valves
  DIG 39  Liquid feeding nozzles
  DIG 40  Oil filter for fuel entering nozzles or float chamber
  DIG 41  Pad retaining means in humidifiers and air conditioners
  DIG 42  Ozonizers
  DIG 43  Air coolers
  DIG 44  Overflow trough
  DIG 45  Processes carburetors
  DIG 46  Residue prevention in humidifiers and air conditioners
  DIG 47  Swing diffusers
  DIG 48  Sonic vibrators
  DIG 49  Suction operated feed valve
  DIG 50  Surge prevention in carburetors
  DIG 51  Carburetors with supercharging blowers
  DIG 52  Carburetor with valves
  DIG 53  Valve actuation
  DIG 54  Venturi scrubbers
  DIG 55  Reatomizers
  DIG 56  Variable venturi
  DIG 57  Interchangeable chore tube
  DIG 58  Choke tube having plurality of leaves
  DIG 59  Choke tube leaves flexible
  DIG 60  Duplex barrels
  DIG 61  Longitudinally reciprocating choke tube (along air
           passage)
  DIG 62  Longitudinally reciprocating choke tube having movable
           parts
  DIG 63  Longitudinally reciprocating choke tube, throttle-operated
  DIG 64  Longitudinally reciprocating choke tube, suction-operated
  DIG 65  Vaporizers
  DIG 66  Water injection to prevent detonation
  DIG 67  Carburetors with vented bowl
  DIG 68  Diaphragm-controlled inlet valve
  DIG 69  Fluid amplifiers in carburetors
  DIG 70  Sewage aerators; diffusers
  DIG 71  Sewage aerators; rotating
  DIG 72  Packing elements
  DIG 73  Carburetor primers; ticklers
  DIG 74  Valve actuation; electrical
  DIG 75  Flowing liquid aspirates gas
  DIG 76  Steam
  DIG 77  Plume abatement
  DIG 78  Sonic floww
  DIG 79  Cooling ponds
  DIG 80  Electrical treatment
  DIG 81  Percolation control
  DIG 82  Upper end injectors
  DIG 83  Fuel vapor generation
  DIG 84  Tamperproof
  DIG 85  Droplet catchers
  DIG 86  Cooling tower ice prevention
  DIG 87  Cooling tower power generators