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 [Search a list of Patent Appplications for class 62]   CLASS 62,REFRIGERATION
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SECTION I - CLASS DEFINITION

This class includes (1) processes and apparatus peculiar to removing heat from a substance, usually by a change of phase of a coolant or refrigerant, as by evaporation, melting or sublimation, (2) the resultant product of part (1), e.g., ice, liquefied or solidified gases, and (3) processes and apparatus peculiar to handling the latter as a stored product, not elsewhere provided for.

SECTION II - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

23, Chemistry: Physical Processes,   subclasses 295+ for processes crystallizing inorganic compounds or non-metal elements not including a refrigeration step, and when there is an intent to make a single-crystal, see Class 117 whether or not including a refrigeration step.
34, Drying and Gas or Vapor Contact With Solids,   for processes and apparatus for drying by operations other than refrigeration, combined with cooling by refrigeration, particularly subclasses 62+ , 284+, 302+, and 391+ and also for processes and apparatus for cooling only by gas or vapor contact involving no characteristics of refrigeration; see particularly subclasses 428+ and the Notes thereunder.
52, Static Structures (e.g., Buildings),   appropriate subclasses for the structure, per se, of an enclosure which may be defined as forming a refrigerated space, particularly subclasses 380+ , 404.1+ and 479+.
95, Gas Separation: Processes,   for processes involving steps resulting in separation of a gas from a fluid mixture comprising (i) a gas and solid or liquid particles entrained therein, (ii) a liquid and gas entrained therein, or (iii) a plurality of gases wherein the steps are of a physical or material handling nature, involve contacting of materials, or exchange properties through electrical or nonreactive chemical treatment. Class 95 takes gas separation of the type noted above including cooling of the sorbent or cooling of the fluid mixture, but not including evaporative cooling after sorption of the type noted in (c) below. Class 95 takes the cold wall-hot wall thermal diffusion type of separation, regardless of any refrigeration claimed. Class 95 also takes expansion through an orifice of a liquid and gas entrained therein where the gas is evolved through the lowering of the pressure and the cooling effect which inherently results from such pressure reduction is not transferred through a wall to another material. If such heat transfer occurs, classification in Class 62 is proper. Class 62 takes (a) eparation of a constituent from a plurality of gases by a significantly claimed refrigeration step or apparatus; (b) condensation of moisture from the atmosphere as a result of a refrigeration operation; (c) gas drying by sorption followed by contacting the dried gas with a liquid to produce cooling by evaporation; (d) a refrigerated enclosure combined with sorption means; (e) refrigeration producing processes and apparatus combined with steps or means for drying the refrigerant; and (f) extracting a constituent from a plurality of gases by liquefaction and separation (e.g., fractionation or distillation, etc.).
96, Gas Separation: Apparatus,   for gas separation apparatus corresponding to the processes of Class 95. The line for apparatus between Class 96 and Class 62 is the same as the line above for processes between Class 95 and Class 62.
99, Foods and Beverages: Apparatus,   subclasses 455 , 470 and 517 for apparatus including cooling means.
100, Presses,   subclasses 92+ for a press with means to cool the material compacted by the press, especially subclasses 310, 312, and 314 for a conveyor-type press having means to cool the article or press.
109, Safes, Bank Protection, or a Related Device,   subclass 63.5 for a closure with means to render the closure lock ineffective, e.g., a refrigerator with safety features to prevent persons from being locked therein.
117, Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor,   for processes and non-coating apparatus for growing therein-defined single-crystal of all types of materials, including inorganic or organic, including those having refrigeration steps or means.
126, Stoves and Furnaces,   subclass 273.5 for a domestic oven using a heat accumulator (e.g., fireless cooker, etc.) or subclass 375.1 for an open-top liquid heating vessel that may include a lid having a heat accumulator.
137, Fluid Handling,   appropriate subclass for processes and apparatus for fluid handling of general utility.
138, Pipes and Tubular Conduits,   subclasses 100 through 178,especially subclass 149 for insulation on pipe.
165, Heat Exchange,   particularly subclasses 58+ for apparatus adapted for interchangeably, convertibly or alternately heating and cooling. See the reference to Class 62 in the definition of subclass 58 of Class 165.
166, Wells,   subclass 57 for well apparatus including refrigeration means, subclasses 265+ for well processes in which fluid may be separated by refrigeration, and subclass 302 for well processes including cooling.
201, Distillation: Processes, Thermolytic,   appropriate subclass for a process of thermolytic distillation of a solid carbonaceous material.
202, Distillation: Apparatus,   appropriate subclass, for apparatus for distillation of general utility.
203, Distillation: Processes, Separatory,   appropriate subclass for a process of separatory distillation of general utility and see Class 203 class definitions for the line between separatory distillation and this class.
210, Liquid Purification or Separation,   appropriate subclass for processes and apparatus which may involve cooling. The following subclasses are particularly noted: subclass 773 for processes involving conversion of solids to liquids before separation, subclass 774 for processes involving heating or cooling and separation, subclass 149 for separating apparatus having means responsive to a thermal condition, and subclasses 175+ for a separator with a heater or heat exchanger.
215, Bottles and Jars,   appropriate subclass for a bottle or jar of general utility.
217, Wooden Receptacles,   appropriate subclass for a crate or shipping vessel of general utility.
220, Receptacles,   appropriate subclass for a tank or receptacle having compartments made mostly of metal, or a tank or container having a mere jacket in which a cooling or heating fluid may be admitted when there is no directing means for circulating the fluid in the jacket.
221, Article Dispensing,   appropriate subclass for mechanism having a specific article dispensing feature in combination with a feature too general for classification in Class 62.
222, Dispensing,   appropriate subclass for a receptacle having a specific dispensing feature with a feature too general for classification in Class 62.
236, Automatic Temperature and Humidity Regulation,   appropriate subclass for a control of general utility. A refrigerant controlling or expansion valve is of general utility unless features resulting in refrigeration production are included.
237, Heating Systems,   appropriate subclass for a heating system which may use the heat rejecting portion of a refrigeration system with additional heating means.
241, Solid Material Comminution or Disintegration,   appropriate subclass for processes and apparatus for comminuting solid refrigerants and also comminuting processes and apparatus provided with cooling means. See section 6 of the class definition of that class (241) for the line.
249, Static Molds,   subclasses 69+ for ice cube trays including means to release ice cubes from a tray, and subclasses 129+ for ice cube trays, per se, for forming plural cubes.
252, Compositions,   particularly subclasses 67+ for (1) admixtures of ingredients, or an old compound limited to use as a refrigerant, (2) processes of refrigeration comprising any known cycle and distinguished solely by the composition or compound therein, when apparatus structure is not included. The preceding are placed in Class 252 even though the freezing or boiling point or temperature of use is specific.
260, Chemistry of Carbon Compounds,   including the related classes for processes of treating or modifying non-hydrocarbon organic compounds: by crystallization wherein the crystallization is not brought about by refrigeration; wherein crystallization, by any means including refrigeration, is combined with synthesis or modification of said compounds by chemical means; or wherein the separation of carbon compounds is accomplished exclusively by physical means other than refrigeration.
261, Gas and Liquid Contact Apparatus,   appropriate subclass, for a gas and liquid contact device having no means specialized to cooling a material out of contact with the contacting fluids.
264, Plastic and Nonmetallic Article Shaping or Treating: Processes,   for molding processes, per se, for materials within the class definition, noting particularly subclass 28 for processes including freezing or cooling to a temperature of zero °C.
299, Mining or In Situ Disintegration of Hard Material,   appropriate subclass for a process or apparatus for recovering or working naturally occurring ice in situ and particularly subclasses 24+ for an ice working machine or cutter.
312, Supports: Cabinet Structure,   particularly subclasses 31 , 31.01, 36, 116, 213, 236, 253, and 400+ of that class (312) and see the Notes thereto, for cabinet structure including an insulated wall cabinet of general utility.
366, Agitating,   appropriate subclasses for agitating process or apparatus of general utility; also, for agitating apparatus involving a cooling means where that means is only a container or a container with means for effecting agitation therein, and in either case there is no modification of either the container or the agitating means restricting the use of the apparatus to refrigeration.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,   subclasses 1+ for processes of preserving by operations other than refrigeration not provided for elsewhere; subclasses 245.1+ for non-coating crystallization apparatus not including chemical reaction means, not including refrigeration means, and not provided for elsewhere; and subclasses 129+ for non-coating crystallization apparatus including means for chemical reaction, which may or may not include refrigeration means, and not provided for elsewhere.
425, Plastic Article or Earthenware Shaping or Treating: Apparatus,   appropriate subclasses for molding apparatus, per se, for merely shaping particulate ice (water or carbon dioxide) into a desired configuration; subclasses 117+ for a specific refrigeration apparatus and mold means to form a composite product from a fluent material and a preform. Class 62 provides for the combination of plastic material shaping or reshaping apparatus combined with refrigeration apparatus for the material shaped.
426, Food Edible Material: Processes, Compositions, and Products,   appropriate subclasses for frozen food products and food working processes combined with freezing.
428, Stock Material or Miscellaneous Articles,   appropriate subclasses for a stock material product in the form of a single or plural layer web or sheet, and especially subclasses 304.4+ for a composite web or sheet including a porous or cellular layer.
454, Ventilation,   for means and related processes for ventilation of an enclosure not specialized to refrigeration. The mere inclusion of a cooler for the air or means subjecting the air to air-liquid contact is not considered a means specialized to refrigeration.
585, Chemistry of Hydrocarbon Compounds,   for processes including a step of refrigeration which treats or modifies only hydrocarbon compounds (claimed or disclosed). Such processes disclosing any non-Class 585 (i.e., non-hydrocarbon) organic compound are placed according to the class line with Class 260 and related classes. Especially see subclass 15 for treating or modifying a crystalline hydrocarbon hydrate and subclasses 812+ for a purification or separation process for recovery of a hydrocarbon.

SUBCLASSES

[List of Patents for class 62 subclass 1]    1CONSUMABLE PRODUCTS PRODUCED BY COOLING:
 This subclass is indented under the class definition.  A congealed or frozen article constituting the product produced by processes or apparatus which is intended to be used only once, e.g., a frozen or chilled unit or mixture of ice and liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

371,for a portable commodity container, i.e., a shipping or handling wrapper or container, or a refillable container for refrigerant using a product of refrigeration.
530,for a sealed, flexible, handled or attachable device containing a coolant usable to cool a substance, space or body.

SEE OR SEARCH CLASS:

252, Compositions,   subclasses 67+ , 70 and 71+ for a thermal compositions provided for, and see the reference to Class 252 in the class definition of this class (62).
426, Food or Edible Material: Processes, Compositions, and Products,   subclasses 70+ for frozen food products.
  
[List of Patents for class 62 subclass 3.1]    3.1USING ELECTRICAL OR MAGNETIC EFFECT:
 This subclass is indented under the class definition.  Process or apparatus in which cooling is produced by the influence of an electrical current or the field surrounding it upon a conductive or magnetic material.
  
[List of Patents for class 62 subclass 3.2]    3.2Thermoelectric; e.g., Peltier effect:
 This subclass is indented under subclass 3.1.  Process or apparatus in which cooling is produced by either the conversion of heat into electricity or that of electricity into heat; e.g., the Peltier effect.
(1) Note. The following classes and subclasses are noted as involving a thermocouple or a thermoelectric device: Class 136, Batteries: Thermoelectric and Photoelectric, subclasses 203+; Class 236, Automatic Temperature and Humidity Regulation, subclasses 69+; Class 310, Electrical Generator or Motor Structure subclass 306; Class 318, Electricity: Motive Power System, subclass 317; Class 322, Electricity: Single Generator Systems, subclass 2; Class 324, Electricity: Measuring and Testing, subclasses 451 and 452+; Class 361, Electricity: Electrical Systems and Devices, subclasses 161+; and Class 374, Thermal Measuring and Testing, subclasses 179+.

SEE OR SEARCH CLASS:

136, Batteries: Thermoelectric and Photoelectric,   subclasses 203+ for Peltier type batter devices, per se. The battery elements are classified in Class 136 even though they are disclosed as used to produce hot and cold junctions by applying a current to them.
  
[List of Patents for class 62 subclass 3.3]    3.3Heat pump, selective heating and cooling:
 This subclass is indented under subclass 3.2.  Process or apparatus wherein the thermoelectric unit moves thermal energy from one location to another, and can be used alternatively to either heat or cool an object.
(1) Note. The change in function is usually accomplished by reversing the flow of electricity within the unit.
  
[List of Patents for class 62 subclass 3.4]    3.4Including dehumidifying and condensate handling:
 This subclass is indented under subclass 3.2.  Process or apparatus wherein the thermoelectric unit is arranged in a system used to remove ambient humidity as condensate, and which includes means to manipulate the removed condensate.
  
[List of Patents for class 62 subclass 3.5]    3.5Made with flexible heat exchanger material; e.g., blanket, wearing apparel, etc.:
 This subclass is indented under subclass 3.2.  Process of apparatus wherein the thermoelectric unit consists of pliant material (e.g., fabric) and can be used in an article of clothing, a blanket, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

259.3,for a structurally installed applicator for the effect of refrigeration.
261,for a flexible heat exchanger adapted to be used with a specific article of furniture; e.g., a bed cover or canopy, etc.
  
[List of Patents for class 62 subclass 3.6]    3.6Interior of enclosure cooled; e.g., refrigerator:
 This subclass is indented under subclass 3.2.  Process or apparatus wherein the thermoelectric unit is used to lower the temperature of a confined space.
(1) Note. Room coolers are not included in this subclass.

SEE OR SEARCH CLASS:

165, Heat Exchange,   subclasses 58+ for room coolers.
  
[List of Patents for class 62 subclass 3.61]    3.61Having vehicle feature; e.g., cooling cart, car, truck, boat, etc.:
 This subclass is indented under subclass 3.6.  Process or apparatus wherein the cooled enclosure has some vehicular feature, such as wheels, casters, skids, pontoons, etc., adapting it for transporting people or cargo.

SEE OR SEARCH THIS CLASS, SUBCLASS:

239+,for other types of refrigerators with vehicle features.
  
[List of Patents for class 62 subclass 3.62]    3.62Portable, having transporting feature; e.g., handle:
 This subclass is indented under subclass 3.6.  Process or apparatus wherein the cooled enclosure is intended to be transported and includes means by which a person may carry or grip the unit or has means for attaching it to a person or vehicle; e.g., a picnic basket, lunch box, insulin cooler, bottle cooler, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

457.1+,for other types of portable refrigeration apparatus.
  
[List of Patents for class 62 subclass 3.63]    3.63Icemaker:
 This subclass is indented under subclass 3.6.  Process or apparatus wherein the enclosure is specifically adapted for converting water into its solid phase.

SEE OR SEARCH THIS CLASS, SUBCLASS:

340+,for other types of icemakers.
  
[List of Patents for class 62 subclass 3.64]    3.64Beverage dispenser:
 This subclass is indented under subclass .36.  Process or apparatus wherein the enclosure is designed to hold a consumable liquid (water, beer, soda, etc.), and means is provided for discharging the liquid from the enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

389+,for other types of cooled beverage dispensers.
  
[List of Patents for class 62 subclass 3.7]    3.7Including specific circuitry or heat exchanger material:
 This subclass is indented under subclass 3.2.  Process or apparatus wherein significance is attributed to either electric circuitry associated with the cooling unit or to a material from which the cooling unit is constructed.
  
[List of Patents for class 62 subclass 4]    4CHEMICAL REACTION OR SOLIDS DISSOLVING:
 This subclass is indented under the class definition.  Subject matter in which a refrigeration effect is produced by (1) a chemical reaction or (2) the dissolving of a solid in a liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

76,for processes involving preliminary manufacturing of a refrigerant, e.g., forming a brine, cooling and utilizing it.
330,for apparatus for manufacturing a refrigerant.

SEE OR SEARCH CLASS:

126, Stoves and Furnaces,   subclasses 263.01+ for a chemical reaction heater and see the Notes thereto.
206, Special Receptacle or Package,   subclasses 219+ for a combination package including a rupturable partition.
  
[List of Patents for class 62 subclass 5]    5VORTEX TUBE, E.G., RANQUE:
 This subclass is indented under the class definition.  Subject matter in which a compressible fluid is caused to flow along a stationary curvilinear path under pressure, producing a refrigeration effect.
  
[List of Patents for class 62 subclass 6]    6GAS COMPRESSION, HEAT REGENERATION AND EXPANSION, E.G., STIRLING CYCLE:
 This subclass is indented under the class definition.  Subject matter in which the refrigeration cycle comprises (1) confining a constant mass of a gas in a chamber whose volume varies from a maximum to a minimum, (2) compressing it, (3) cooling it, and (4) expanding it; the gas remaining as such throughout the cycle; the action of stages (2), and (3) being alternate with heat storage and return (regeneration) between these stages.

SEE OR SEARCH CLASS:

60, Power Plants,   subclasses 516+ for a structurally similar heat operated motor.
  
[List of Patents for class 62 subclass 7]    7UTILIZING FUEL AS REFRIGERANT:
 This subclass is indented under the class definition.  Subject matter in which the refrigerant is used as a refrigeration producer and consumed as a fuel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

45.1+,for processes and apparatus for handling stored liquefied or solidified gas, particularly subclasses 48.1+ for vapor dispensing from a liquefied gas dispenser.
  
[List of Patents for class 62 subclass 45.1]    45.1STORAGE OF SOLIDIFIED OR LIQUIFIED GAS (E.G., CRYOGEN):
 This subclass is indented under the class definition.  Process or apparatus for storing a product of refrigeration comprising a substance in solid or liquid phase, which substance boils at or below standard atmospheric temperature when under standard atmospheric pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7,for liquified or solidified gas used as a fuel.
600+,for liquified or solidified gas product manufacturing.

SEE OR SEARCH CLASS:

48, Gas: Heating and Illuminating,   appropriate subclass for a process, apparatus, or composition for the manufacture of gas for heating or illumination, and see the notes in the class definition of that class.
137, Fluid Handling,   subclasses 317+ for means to tap a tank under pressure, and subclasses 334+ for heat exchange ancillary to a fluid handling system.
141, Fluent Material Handling, With Receiver or Receiver Coacting Means,   subclass 20 for a means of filling an aerosol, and subclasses 311+ for a filling means with a receiver or receiver coacting means, particularly subclass 330 for a puncturing connecting means mounted on a receiver.
169, Fire Extinguishers,   subclasses 5+ for a fluid system in fire extinguishing apparatus using liquified or solidified gas.
206, Special Receptacles and Packages,   subclasses .6+ for a specialized receptacle for storing gas, and see the notes in that class.
220, Receptacles,   subclasses 560.04+ for a receptacle for storing material under cryogenic conditions.
222, Dispensing,   appropriate subclass for a liquid dispenser of general utility, particularly subclasses 3+ for gas dispensing apparatus not limited to liquified gas, and subclasses 173+ for a dispenser with a casing or support.
239, Fluid Sprinkling, Spraying, and Diffusing,   subclasses 548+ and 589+ for spraying nozzles of general utility.
  
[List of Patents for class 62 subclass 46.1]    46.1With sorbing or mixing:
 This subclass is indented under subclass 45.1.  Process or apparatus in which the product of refrigeration is either (a) taken into and held by a sorptive material, (b) acted upon by a solvent, or (c) otherwise mixed with a diverse fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

114+,for refrigeration processes including sorption of a liquified gas-type refrigerant.

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48, Gas: Heating and Illuminating,   subclass 195 for means for charging heating and illuminating gas with an odorous substance.
  
[List of Patents for class 62 subclass 46.2]    46.2Mixing of substance with hydrogen:
 This subclass is indented under subclass 46.1.  Process or apparatus wherein the product of refrigeration is combined with hydrogen.
(1) Note. The resulting compound is either a hydride or a hydrate.

SEE OR SEARCH CLASS:

34, Drying and Gas or Vapor Contact With Solids,   subclass 402 for processes involving contact of a material with hydrogen under pressure.
  
[List of Patents for class 62 subclass 46.3]    46.3Sorbing into capillary material:
 This subclass is indented under subclass 46.1.  Process or apparatus wherein the product of refrigeration is absorbed into a porous material.
  
[List of Patents for class 62 subclass 47.1]    47.1With conservation of cryogen by reduction of vapor to liquid within storage receptacle:
 This subclass is indented under subclass 45.1.  Process or apparatus wherein vapor pressure within the receptacle is limited by reducing the vapor to its liquid phase while in the receptacle.
(1) Note. The result is that vaporization of the product of refrigeration is minimized.

SEE OR SEARCH THIS CLASS, SUBCLASS:

48.2,for a process or an apparatus wherein vapor is removed from the receptacle and subsequently returned to its liquid phase.
  
[List of Patents for class 62 subclass 48.1]    48.1With vapor discharged from storage receptacle:
 This subclass is indented under subclass 45.1.  Process or apparatus wherein vapor within the receptacle is removed from the receptacle.

SEE OR SEARCH CLASS:

123, Internal Combustion Engines,   subclasses 434+ for a charge forming device related to an internal combustion engine.
  
[List of Patents for class 62 subclass 48.2]    48.2And subsequently restored to receptacle as liquid:
 This subclass is indented under subclass 48.1.  Process or apparatus wherein the removed vapor is condensed and then returned to the receptacle as a liquid.
  
[List of Patents for class 62 subclass 48.3]    48.3And subsequently used to cool receptacle:
 This subclass is indented under subclass 48.1.  Process or apparatus wherein the removed vapor is used to cool either the receptacle"s walls or an external component of the receptacle (e.g., a radiation shield, the receptacle"s, foundation).
  
[List of Patents for class 62 subclass 48.4]    48.4Discharge caused by ignition of combustible gas:
 This subclass is indented under subclass 48.1.  Process or apparatus wherein combustion of a gas results in vaporization and discharge of stored liquid.
  
[List of Patents for class 62 subclass 49.1]    49.1With measuring:
 This subclass is indented under subclass 45.1.  Process or apparatus wherein a characteristic of the product of refrigeration is measured.

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73, Measuring and Testing,   subclasses 290+ for liquid level testing, subclasses 700+ for fluid pressure testing, and subclasses 861+ for volume or flow rate measuring.
374, Thermal Measuring and Testing,   subclasses 339+ for temperature measuring.
  
[List of Patents for class 62 subclass 49.2]    49.2Of liquid level:
 This subclass is indented under subclass 49.1.  Process or apparatus wherein the height of the stored product within the receptacle is measured.
  
[List of Patents for class 62 subclass 50.1]    50.1Liquified gas transferred as liquid:
 This subclass is indented under subclass 45.1.  Process or apparatus wherein the product of refrigeration is removed from the receptacle as a liquid.

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137, Fluid Handling,   subclasses 209+ for apparatus using gas pressure to discharge a liquid from a fluid system containing diverse fluids, and particularly subclass 210 for such apparatus with means to generate the gas pressure from the liquid.
  
[List of Patents for class 62 subclass 50.2]    50.2With vaporizing of liquified gas downstream of storage:
 This subclass is indented under subclass 50.1.  Process or apparatus wherein the liquid becomes a vapor subsequent to removal from the receptacle.
(1) Note. Potential energy is released when the liquid is converted to vapor.
  
[List of Patents for class 62 subclass 50.3]    50.3Energy converted to work (e.g., used to drive prime mover):
 This subclass is indented under subclass 50.2.  Process or apparatus wherein the potential released by vaporization is transformed into applied power; e.g., used to drive a turbine or motor.
  
[List of Patents for class 62 subclass 50.4]    50.4Operates valve which controls flow of liquid:
 This subclass is indented under subclass 50.2.  Process or apparatus wherein the potential adjusts a valve used to regulate the liquid being removed from the receptacle.
  
[List of Patents for class 62 subclass 50.5]    50.5In phase separator:
 This subclass is indented under subclass 50.2.  Process or apparatus wherein the moved liquid enters a chamber which allows partial vaporization, from which the remaining liquid and the vapor are discharged separately.
  
[List of Patents for class 62 subclass 50.6]    50.6Specific pump structure:
 This subclass is indented under subclass 50.1.  Process or apparatus wherein significance is attributed to a means for generating flow of the liquid; i.e., a pump.
  
[List of Patents for class 62 subclass 50.7]    50.7Specific conduit, valve, or coupling structure:
 This subclass is indented under subclass 50.1.  Process or apparatus wherein significance is attributed to a component adapted to constrain or control flow of the liquid.
  
[List of Patents for class 62 subclass 51.1]    51.1Including cryostat:
 This subclass is indented under subclass 45.1.  Process or apparatus wherein the cryogen is contained by a portable vessel and cools a device contained by the vessel (e.g., an infrared detector).
  
[List of Patents for class 62 subclass 51.2]    51.2Joule-Thompson liquefier:
 This subclass is indented under subclass 608.  Subject matter wherein the liquefaction of helium is effected bypassage from a high pressure to a low pressure through an adjustable orifice and the exiting liquid precools the incoming gas by indirect heat exchange.
  
[List of Patents for class 62 subclass 52.1]    52.1Spraying of cryogen:
 This subclass is indented under subclass 45.1.  Process or apparatus including discharge of the product of refrigeration as a stream of droplets, or means for producing such a stream (e.g., a nozzle).
  
[List of Patents for class 62 subclass 53.1]    53.1Underground or underwater storage:
 This subclass is indented under subclass 45.1.  Process or apparatus wherein the product of refrigeration is stored in a subterranean or subaqueous receptacle (e.g., a tank, a void, etc.) adapted to hold a cryogen.

SEE OR SEARCH CLASS:

405, Hydraulic and Earth Engineering,   subclasses 53+ for underground fluid storage for general applications; and subclasses 195.1+ for underwater fluid storage for general applications.
  
[List of Patents for class 62 subclass 53.2]    53.2Storage in modified vehicle (e.g., ship, truck, etc.):
 This subclass is indented under subclass 45.1.  Process or apparatus wherein the product of refrigeration is stored in a conveyance adapted to carry a cryogen.
  
[List of Patents for class 62 subclass 54.1]    54.1Cryogen stored in both phases (e.g., as slush or gel):
 This subclass is indented under subclass 45.1.  Process or apparatus wherein the product of refrigeration is stored as a mixture of substances having diverse phase characteristics; e.g., a slush, a slurry, a colloidal suspension, etc.
(1) Note. The substances may have the same chemical composition, differing only in phase (e.g., both solid and liquid).

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516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,   for colloid systems or agents for such systems or making or stabilizing such systems or agents, especially subclasses 9+ for continuous liquid phase (emulsions, slurries, suspensions), subclasses 98+ for continuous or semicontinuous solid phase (gels, pastes); in each instance, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.
  
[List of Patents for class 62 subclass 54.2]    54.2Controlled conversion of solidified gas to another phase:
 This subclass is indented under subclass 45.1.  Process or apparatus wherein a product of refrigeration in solid phase is transformed at a regulated rate into either a liquid or gaseous phase.

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165+,for a refrigeration producer having automatic control using solidified gas.
384+,for a cooler utilizing solidified gas.

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239, Fluid Sprinkling, Spraying, and Diffusing,   subclass 60 for holders for solid matter to be converted to gas by sublimation; e.g., moth balls or crystals.
  
[List of Patents for class 62 subclass 54.3]    54.3Storing solidified gas:
 This subclass is indented under subclass 45.1.  Process or apparatus wherein the product of refrigeration is stored in solid phase.

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60,for a refrigeration process including packaging.
371+,for a package cooled by solid refrigerant.
529+,for a refrigerant or coolant storer or handler.

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53, Package Making,   subclass 440 for processes of package making with contents treated by cooling; and subclass 127 for package making apparatus with cooling means.
  
[List of Patents for class 62 subclass 55.5]    55.5LOW PRESSURE COLD TRAP PROCESS AND APPARATUS:
 This subclass is indented under the class definition.  Processes and apparatus involving a condensing device which in use operates substantially below 0° C and substantially below atmospheric pressure to condense a material which exists as a gas in the feed line to the condensing device by condensing and retaining the material as a liquid or solid on a heat exchange surface which is kept sufficiently cold by means which is usually a liquefied or solidified gas or mixture thereof to cause the desired condensation.

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8+,for processes and apparatus for manufacturing a liquefied or solidified gas mercantile product from a normally gaseous material.
272,for refrigeration with means for preventing or handling atmospheric condensate.

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34, Drying and Gas or Vapor Contact With Solids,   subclasses 73+ , 284+, 402, and 468, for processes and apparatus for drying which if operated at sufficiently low pressure may use a "cold trap".
96, Gas Separation: Apparatus,   for gas separation apparatus provided with heating or cooling means.
137, Fluid Handling,   subclasses 171+ for fluid separating traps or vents in a fluid distribution system of more general application.
165, Heat Exchange,   subclasses 110+ for a heat exchanger of more general application in which a body or stream of fluid of one density is in communication with a fluid of a second density, one of which is condensed.
202, Distillation: Apparatus,   subclasses 185+ for a still and a condenser.
  
[List of Patents for class 62 subclass 56]    56PROCESSES:
 This subclass is indented under the class definition.  Processes of refrigeration.

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600+,for gas liquefying or solidifying processes.
  
[List of Patents for class 62 subclass 57]    57Suspending in upwardly directed current:
 This subclass is indented under subclass 56.  Processes wherein particles are suspended by an upwardly directed fluid current.

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34, Drying and Gas or Vapor Contact With Solids,   subclass 359 for a gas or vapor contact with solids process with fluid current conveying or suspension of treated materials.
210, Liquid Purification or Separation,   subclasses 616 and 661 for processes of liquid treatment utilizing a static suspended bed and see (1) Note for other classes having art involving fluidized bed solid and fluid contacting.
  
[List of Patents for class 62 subclass 59]    59Accumulating holdover ice in situ:
 This subclass is indented under subclass 56.  Processes including making a solid refrigerating medium in situ by a refrigeration cycle, to be used to cool during high refrigeration demand or failure of the cycle.

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139,for automatic control of accumulation of ice on a freezing surface.
434+,for apparatus using a fluid or an isolated nonliquid holdover.
529+,for a refrigerant or coolant storer or handler, e.g., a container for a freezable material.
  
[List of Patents for class 62 subclass 60]    60Packaging:
 This subclass is indented under subclass 56.  Processes including enclosing a refrigerated material in a closed or closable receptacle to form a completed transportable unit.

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371+,for a refrigerated portable commodity container.
530,for an envelope type container for a freezable material.

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53, Package Making,   particularly subclass 127 for packaging not specialized to refrigeration and see the reference to Class 62 in that subclass (127).
141, Fluent Material Handling, With Receiver or Receiver Coacting Means,   subclass 82 for the subject matter of that class combined with cooling not specialized to refrigeration.
426, Food or Edible Material: Processes, Compositions, and Products,   subclass 393 for process involving the packaging and freezing food.
  
[List of Patents for class 62 subclass 61]    61Utilizing motion of vehicle:
 This subclass is indented under subclass 56.  Processes including utilizing the motion of a carrier to effect the refrigeration process.

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133,for automatic control of related apparatus.
241+,for related apparatus.
  
[List of Patents for class 62 subclass 62]    62Treating an article:
 This subclass is indented under subclass 56.  Processes in which material to be cooled or refrigerated is an article comprising a physical entity identifiable as such before congelation and having a fixed boundary surface including particulate material, a removable container enclosing a liquid or a living thing.

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66+,for processes involving treating of a flowable material, e.g., congelation or ice making.

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29, Metal Working,   subclass 447 for process of assembly involving prestressing, e.g., chilling a part.
34, Drying and Gas or Vapor Contact With Solids,   subclass 428 for processes of cooling an article by gas contact not specialized to refrigeration.
148, Metal Treatment,   subclass 125 for processes involving refrigerating metal or metal articles in order to alter the internal characteristics or the properties of the metal.
426, Food or Edible Material: Processes, Compositions, and Products,   for processes of refrigerating and treating edible material.
  
[List of Patents for class 62 subclass 63]    63Moving through cooling zone during cooling:
 This subclass is indented under subclass 62.  Processes wherein the article is moved through a cooling zone or past cooling means while the cooling is effective on the article.

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68+,for processes involving agitation of a flowable material undergoing congelation.
71+,for means removing an initially liquid product from a freezing surface.
378+,for related apparatus.
  
[List of Patents for class 62 subclass 64]    64By contacting with liquid:
 This subclass is indented under subclass 62.  Processes in which the cooling is effected by contacting the article with a coolant liquid.

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56,for cooling by contact with a solidified refrigerant even though there be incidental use of the ice melt.
373+,for related apparatus.

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134, Cleaning and Liquid Contact With Solids,   subclasses 1 through 42for processes of contacting an article with a liquid not limited to cooling of the article.
  
[List of Patents for class 62 subclass 65]    65Diverse sequential temperatures, e.g., precooling:
 This subclass is indented under subclass 62.  Processes wherein a material is sequentially subjected to diverse temperatures.

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63,for processes wherein an article is moving during cooling.
  
[List of Patents for class 62 subclass 66]    66Congealing flowable material, e.g., ice making:
 This subclass is indented under subclass 56.  Processes for congealing material initially in a flowable condition, e.g., ice cream or ice making or condensing fluid to solid.

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59,for holdover solid coolant accumulating processes which hold-over is intended for use without removal.
60,for processes involving packaging.
62,for processes of cooling an article which is initially an identifiable fixed entity.
80+,for defrosting processes.
151+,for automatic control apparatus.
272+,for condensate handling.
340+,for shaped or modified congealed product producing apparatus.
532+,for fractionally solidifying and separating processes.
601+,for solidified gas producing processes and apparatus there provided for.

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65, Glass Manufacturing,   subclasses 454+ for processes of manufacturing glass fibers or filaments from molten or flowable material, especially subclass 482 for cooling of molten material at forming area; and subclasses 19+ for processes of otherwise utilizing molten or plastic slag.
264, Plastic and Nonmetallic Article Shaping or Treating: Processes,   subclass 5 for methods of forming solid particulate matter directly from a molten or liquid mass, e.g., liquid comminuting.
  
[List of Patents for class 62 subclass 67]    67With filtering or gravitational separating:
 This subclass is indented under subclass 66.  Processes including filtration or gravitational separation.

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85,for other processes involving separating of undesirables from a coolant or cooled material.
318+,for related apparatus.
532+,for fractional crystallization of at least one constituent of a mixture of constituents of different kinds.

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210, Liquid Purification or Separation,   subclasses 767+ for processes and subclasses 175+ for apparatus functioning for a more general purpose.
  
[List of Patents for class 62 subclass 68]    68Agitating:
 This subclass is indented under subclass 66.  Processes including agitation of a confined body of material during freezing.

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74,for processes involving spraying or dripping into a space.
342+,for related apparatus.

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366, Agitating,   appropriate subclass, for apparatus and related processes of agitation of general utility.
  
[List of Patents for class 62 subclass 69]    69Introducing gas, e.g., air:
 This subclass is indented under subclass 68.  Processes wherein air or gas is introduced in a material being frozen.
(1) Note. Processes of freezing and incorporating a gas into the material being frozen is proper for Class 62; however any additional food working step would cause the patent to be classified in Class 426.

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261, Gas and Liquid Contact Apparatus,   subclasses 83+ for such apparatus utilizing rotating means.
  
[List of Patents for class 62 subclass 70]    70By injecting:
 This subclass is indented under subclass 69.  Processes wherein the gas is injected into the agitated material.

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304+,particularly 306, for means feeding gas into a pressurized receiver.
307+,for a submerged gas inlet.
  
[List of Patents for class 62 subclass 71]    71Removing product from congealing surface:
 This subclass is indented under subclass 66.  Processes including removal of frozen material from a mold or cooling surface.

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353+,for a heat absorber with a product remover.
  
[List of Patents for class 62 subclass 72]    72Flexing supporting surface:
 This subclass is indented under subclass 71.  Processes wherein a frozen material is removed by flexing a supporting surface, e.g., endless belt.

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345,for apparatus utilizing a moving freezing surface.
  
[List of Patents for class 62 subclass 73]    73By heating:
 This subclass is indented under subclass 71.  Processes including application of heat.

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349+,for congealing apparatus with thawing means.
  
[List of Patents for class 62 subclass 74]    74Spraying or dripping:
 This subclass is indented under subclass 66.  Processes wherein a material is sprayed or dripped into a zone.

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64+,for processes involving contact of an article with a liquid.
347,for related apparatus.

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159, Concentrating Evaporators,   subclasses 48.1+ for process of concentrating a liquid involving spraying by application of vacuum.
264, Plastic and Nonmetallic Article Shaping of Treating: Processes,   subclass 5 for processes of forming solid particulate matter directly from a molten or liquid mass, e.g., liquid comminuting.
425, Plastic Article or Earthenware Shaping or Treating: Apparatus,   subclasses 6+ for a means to manufacture particulate material directly from a molten material generally by comminuting the material in a means providing a zone below the freezing point of the material.
  
[List of Patents for class 62 subclass 75]    75Sequential stages, e.g., composite block making:
 This subclass is indented under subclass 66.  Processes wherein a step of freezing or cooling is followed by another step of freezing, or a prefrozen material is added to another material which is then frozen into a composite solid.

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65,for processes of treating an article involving use of diverse sequential temperatures.
  
[List of Patents for class 62 subclass 76]    76With preliminary refrigerant manufacturing:
 This subclass is indented under subclass 56.  Processes which includes producing a refrigerant and introducing it into a refrigerating system.

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4,for processes and apparatus utilizing the endothermic action of a chemical reaction or the dissolving of a solid.
114,for processes employing diverse materials or a particular refrigerant in a refrigeration operation.
330,for related apparatus.

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252, Compositions,   subclasses 67+ , 70 and 71 for compositions and related processes of making them.
  
[List of Patents for class 62 subclass 77]    77Assembling, charging, or repairing of refrigeration producer:
 This subclass is indented under subclass 56.  Processes which include assembling parts of a refrigeration apparatus, installing the refrigeration apparatus in its position of use, charging the apparatus with a fluid (usually refrigerant or lubricant) or repairing some part of the apparatus which has been damaged.

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292,for charging apparatus.
298+,for assembly apparatus.

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29, Metal Working,   subclasses 890.03+ particularly subclass 890.035 for processes of mechanical manufacture of an element, and subclasses 428+ for processes of assembling elements of a refrigeration device.
137, Fluid Handling,   subclasses 15.01 through 15.26for a process of cleaning, repairing or assembling, subclasses 237-246.23 with a cleaner, lubrication added to fluid or liquid sealing at a valve interface, or subclasses 315.01-329.4 for a fluid handling system with repair, tapping, or assembly means.
228, Metal Fusion Bonding,   subclasses 101+ for the process of assembling and fusion bonding of the elements of a refrigeration device.
  
[List of Patents for class 62 subclass 78]    78Deodorizing, antisepticizing or providing special atmosphere:
 This subclass is indented under subclass 56.  Processes which include deodorizing, antisepticizing or germiciding the material which is subjected to refrigeration or providing a special atmosphere in a cooled space.

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56,for processes of cooling involving subjecting to a melting or subliming refrigerant.
91+,for processes involving humidifying.
93+,for dehumidifying air.
121,for gas-liquid contacting processes.
264,for apparatus including illuminating or radiant energy means, e.g., ultraviolet.
388,for apparatus wherein a sublimed gas enters a cooled enclosure.

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34, Drying and Gas or Vapor Contact With Solids,   subclasses 516+ for drying processes involving special atmosphere.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,   subclasses 1+ for subject matter of more general utility.
424, Drug, Bio-Affecting and Body Treating Compositions,   appropriate subclass for an antiseptic composition and subclasses 76.1+ for a deodorizing composition.
  
[List of Patents for class 62 subclass 79]    79Exchanging heat between plural systems, e.g., disparate:
 This subclass is indented under subclass 56.  Processes in which (1) heat is exchanged with a disparate (nonrefrigeration) system, or (2) refrigeration is produced by plural separate systems, there being a heat transfer relationship between the systems.
(1) Note. Evaporation and condensation are considered to be refrigeration production.

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81+,for processes of defrosting utilizing a fluid which may include the use of heat to vaporize a heat transfer fluid which is condensed in the vicinity of the heat absorber.
96,and 99, for processes involving nonchange of state by indirect transfer fluid operations.
175,for automatic control of related systems.
238,for refrigeration apparatus exchanging heat with disparate means.
332+,for diverse refrigeration systems.
335,for a refrigeration system with plural paired elements.
  
[List of Patents for class 62 subclass 80]    80Defrosting or frost inhibiting:
 This subclass is indented under subclass 56.  Processes which include inhibiting deposition of, or removing frozen atmospheric condensate from, a heat absorbing surface of refrigeration apparatus.

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150+,for automatic control of related apparatus.
272+,for related apparatus.
  
[List of Patents for class 62 subclass 81]    81By utilizing working fluid of refrigeration producer
 This subclass is indented under subclass 80.  Processes accomplished by utilizing a fluid used in the refrigeration process.

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277+,for related apparatus.
  
[List of Patents for class 62 subclass 82]    82By utilizing fluid strange to system :
 This subclass is indented under subclass 80.  Processes wherein a fluid, which is unnecessary to the refrigeration process is utilized.

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282,for related apparatus.
  
[List of Patents for class 62 subclass 83]    83Preventing slugging to compressor:
 This subclass is indented under subclass 56.  Processes in which a liquid is prevented from entering the suction inlet to the compressor.

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84,for other processes involving lubrication of a refrigeration system.
113,for processes involving transferring heat between diverse function portions of a refrigeration cycle for other purposes.
174,for automatic control of trapping and discharging refrigerant batches.
503,509, 512, and 513, for refrigeration apparatus with features which may prevent slugging.
  
[List of Patents for class 62 subclass 84]    84Lubricant handling:
 This subclass is indented under subclass 56.  Processes which involves handling a liquid lubricant within a circuit.

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83,for processes of preventing slugging.
85,for processes involving separating impurities from refrigerant and see the Notes, thereto.
192+,for automatic control of refrigeration producer lubrication.
468+,for related apparatus.
  
[List of Patents for class 62 subclass 85]    85Separating or preventing formation of undesirables:
 This subclass is indented under subclass 56.  Processes which include the separating or prevention of the formation of undesirables in a refrigerant, on the internal surface of a refrigerant container or from a material being cooled, e.g., internal freeze inhibition.

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77,for processes involving charging a refrigeration producing system which may also remove undesirable matter.
78,for processes involving deodorizing, antisepticizing or providing a special atmosphere.
80,for processes involving defrosting.
83,for processes involving prevention of refrigerant slugging.
84,for lubricant handling processes.
93+,for processes involving gas dehumidification.
317,for apparatus for clarifying or separating materials from an external cooled gas.
468+,for a refrigeration producer and lubricant handler.
474,for a refrigeration producer with a refrigerant treater.
  
[List of Patents for class 62 subclass 86]    86Reducing pressure on compressed gas:
 This subclass is indented under subclass 56.  Processes in which a gas is expanded to such a degree that a discernible drop in the temperature thereof is produced thereby, the gas remaining as such during the cooling operation.

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613+,621+, 645+, and 649+, for processes and apparatus for liquefying or solidifying a gas.
115,for processes involving compressing, condensing and evaporating a fluid.
401+,for related apparatus.
  
[List of Patents for class 62 subclass 87]    87Converting energy of expansion to mechanical movement:
 This subclass is indented under subclass 86.  Processes in which a portion of the energy of expansion is converted to usable mechanical movement.

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38+,for operation with an expansion engine.
402+,for related apparatus.
  
[List of Patents for class 62 subclass 88]    88With reheat of gas stream:
 This subclass is indented under subclass 87.  Processes in which the gas stream is reheated subsequent to expansion.

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90,for processes involving cooling and reheating of a gas.
  
[List of Patents for class 62 subclass 89]    89Circulating external gas:
 This subclass is indented under subclass 56.  Processes in which a gas external of a refrigeration producer is caused to circulate.

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86+,for processes involving reducing pressure on a compressed gas.
404+,for related apparatus.

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34, Drying and Gas or Vapor Contact With Solids,   subclass 428 for a process of cooling solids by mere contact with a gas, and see notes in the definition of this subclass.
  
[List of Patents for class 62 subclass 90]    90With reheating:
 This subclass is indented under subclass 89.  Processes in which the gas is heated following the cooling operation.

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113,for processes of reheating cooled fluid of a refrigeration cycle by internal exchange.
173,for an automatically controlled apparatus having a similar function.
272,particularly subclasses 275+, for a cooler with a condensate remover which may include air reheating.
428,for an air cooler with means directing air over a heat rejector which may include air cooling and reheating by a refrigeration producer.

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165, Heat Exchange,   subclass 223 for a reheating means automatically controlled by a humidistat, subclass 263 for reheating means controlled by temperature, and subclass 65 for a heater and cooler serially arranged in a flow path.
  
[List of Patents for class 62 subclass 91]    91With adding of moisture:
 This subclass is indented under subclass 89.  Processes in which moisture is added to the gas being cooled.
  
[List of Patents for class 62 subclass 92]    92With removing of moisture:
 This subclass is indented under subclass 91.  Processes in which moisture is removed from the gas.

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80+,for processes of defrosting or frost inhibiting.
85,for removal of undesirables other than moisture.
  
[List of Patents for class 62 subclass 93]    93With removing of moisture:
 This subclass is indented under subclass 89.  Processes in which moisture is removed from the gas.

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92,for moisture removing processes combined with moisture addition.
  
[List of Patents for class 62 subclass 94]    94By sorption:
 This subclass is indented under subclass 93.  Processes by passing the gas in contact with a sorbent.

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271,for related apparatus and see the Notes thereto.
  
[List of Patents for class 62 subclass 95]    95Plural cooling, e.g., precooling by exhaust:
 This subclass is indented under subclass 89.  Processes in which gas is subjected to the cooling action of plural heat absorbing operations or of separate and distinct operations of a heat absorption.

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65,for plural temperature treatment of an article.
75,for sequential treatment of a congealing flowable material.
  
[List of Patents for class 62 subclass 96]    96Indirect cooling using closed circuit heat transfer fluid:
 This subclass is indented under subclass 89.  Processes in which heat from the circulating gas being cooled is transferred to a heat absorber by indirect heat exchange through an intermediate fluid.

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406,for related apparatus.
  
[List of Patents for class 62 subclass 97]    97Combining streams having diverse temperatures:
 This subclass is indented under subclass 89.  Processes in which two streams of gas having diverse temperatures are combined into a single stream.

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122,for other refrigeration processes involving combining of fluid having diverse temperature.
  
[List of Patents for class 62 subclass 98]    98Fluid external of refrigeration producing cycle:
 This subclass is indented under subclass 56.  Processes in which refrigeration is used to absorb heat from a fluid (usually a liquid) which is isolated from the working fluid of a refrigeration cycle.

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89+,particularly subclass 96 for processes wherein the fluid cooled is air.
  
[List of Patents for class 62 subclass 99]    99Indirect by using heat transfer fluid external of cycle:
 This subclass is indented under subclass 98.  Processes in which the heat removed from the external cooled fluid is transferred to a heat absorber by indirect heat exchange through an intermediate fluid.

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396+,for a liquid in heat exchange with a coolant.
430+,for related apparatus.
  
[List of Patents for class 62 subclass 100]    100Vacuumizing an open outlet chamber:
 This subclass is indented under subclass 56.  Processes in which a subatmospheric pressure is created in a chamber by removing a gas or vapor from it.

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268+,for related apparatus and see the Notes thereto.

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34, Drying and Gas or Vapor Contact With Solids,   subclasses 402+ for related processes of drying solids.
159, Concentrating Evaporators,   subclasses 47.1+ for related processes of evaporating and concentrating liquids.
  
[List of Patents for class 62 subclass 101]    101Evaporation induced by sorption:
 This subclass is indented under subclass 56.  Processes in which a liquid is evaporated to produce cooling and the vapor is sorbed by a sorbent.

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100,for vacuumizing an open outlet chamber which may include the use of a sorbent.
141+,for automatic control of a sorbent system.
476+,for a sorbent type refrigeration producer.
  
[List of Patents for class 62 subclass 102]    102Using diverse refrigerants:
 This subclass is indented under subclass 101.  Processes in which plural refrigerants are evaporated in presence of each other.

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114,for other processes of refrigeration production utilizing plural refrigerants.
  
[List of Patents for class 62 subclass 103]    103With modulated flow rate of fluid:
 This subclass is indented under subclass 101.  Processes in which a fluid is circulated at varying rates.
  
[List of Patents for class 62 subclass 104]    104By varying heat input or output:
 This subclass is indented under subclass 103.  Processes in which fluid circulation is altered by varying the heat input or the heat rejected by the system.

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148,for automatic control of the heating means of a sorption system.
183,for automatic control of a fluid for a heat rejecter.
  
[List of Patents for class 62 subclass 105]    105Varying non-refrigerant fluid flow:
 This subclass is indented under subclass 103.  Processes in which the flow of a nonrefrigerant fluid, e.g., inert gas or a noncondensible gas is varied.

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104,for related processes in which the fluid flow may be modulated by varying the heat input or the heat rejection.
490+,for a sorption system utilizing an inert gas.
  
[List of Patents for class 62 subclass 106]    106Intermittent operating of generation and sorption cycle:
 This subclass is indented under subclass 101.  Processes in which generation of refrigerant vapor alternates with absorption.

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143+,for automatic control of such a unit.
477+,for related apparatus.
  
[List of Patents for class 62 subclass 107]    107With absorption liquid circulation aided by system generated pressure:
 This subclass is indented under subclass 101.  Processes wherein the sorption liquid is transferred between the generator and sorber due to pressures of fluids generated within the system.

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487+,for related apparatus.
  
[List of Patents for class 62 subclass 108]    108With liquid refrigerant transfer to evaporator against gravity:
 This subclass is indented under subclass 101.  Processes including the transferral of liquid refrigerant to and through the evaporator against gravity.
  
[List of Patents for class 62 subclass 109]    109Cooling by evaporation of refrigerant from sorption solution:
 This subclass is indented under subclass 101.  Processes wherein the cooling is effected by vaporization of refrigerant from a sorption solution.
  
[List of Patents for class 62 subclass 110]    110With diffusion of refrigerant into inert gas:
 This subclass is indented under subclass 101.  Processes wherein an inert gas is admitted into or overlies a body of liquid refrigerant, the liquid refrigerant diffusing into the inert gas.

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490+,for related apparatus.
  
[List of Patents for class 62 subclass 111]    111With forced circulation between evaporator and sorber:
 This subclass is indented under subclass 110.  Processes in which the fluid is caused to circulate between the evaporator and sorber due to the creation of conditions other than those which allow the fluid to circulate due to differences in density.

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109,for processes involving cooling by evaporation from a sorbent solution.
  
[List of Patents for class 62 subclass 112]    112Utilizing particular refrigerant and/or sorbent materials:
 This subclass is indented under subclass 101.  Processes in which a specific refrigerant and/or sorbent is used.

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114,for more general processes utilizing diverse materials or particular refrigerants.
502,for apparatus utilizing diverse refrigerants.
  
[List of Patents for class 62 subclass 113]    113Transferring heat between diverse function portions of refrigeration cycle:
 This subclass is indented under subclass 56.  Processes in which one portion of a refrigeration system having a first function is in heat exchange relation with another portion having another function.

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513,for related apparatus.

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203, Distillation: Processes, Separatory,   subclasses 21+ for a separatory distillation process directed to recovering heat from a material in the system by indirect heat exchange with a second material. The source of heat may be a distillate or a residue and the transfer of heat may take place at any point in the system.
  
[List of Patents for class 62 subclass 114]    114Employing diverse materials or particular material in refrigeration circuit:
 This subclass is indented under subclass 56.  Processes employing diverse refrigerants or a particular material as a refrigerant.

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85,for processes of preventing formation of undesirables.
86+,for processes involving air as a refrigerant.
112,for sorption type refrigeration processes utilizing particular refrigerant and/or sorbent materials.
490+,for sorbent type refrigeration apparatus including inert gas means.
502,for a compressor-condenser-evaporator apparatus using diverse fluids.

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252, Compositions,   subclasses 67+ for refrigerant compositions, per se.
  
[List of Patents for class 62 subclass 115]    115Compressing, condensing and evaporating:
 This subclass is indented under subclass 56.  Processes which include compressing, condensing and evaporating a refrigerant.

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86,for processes involving pressure reduction on a fluid which is a gas at all stages of the process.
498+,for related apparatus.
  
[List of Patents for class 62 subclass 116]    116Utilizing motive energy of fluid to compress:
 This subclass is indented under subclass 115.  Processes in which the motive energy of a fluid is employed to compress the fluid in the refrigeration cycle.

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500,for jet powered apparatus.
501,for a fluid energized compressor.
  
[List of Patents for class 62 subclass 117]    117Dividing refrigerant flow, e.g., bypass parallel units:
 This subclass is indented under subclass 115.  Processes in which the refrigerant in at least one portion of its flow path is divided into two or more flow paths.

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196+,for automatic control of by-pass means.
504,for a compressor-condenser-evaporator circuit with means to apportion flow to its evaporator.
525,for an evaporator with a particular flow distributor to sections thereof.
  
[List of Patents for class 62 subclass 118]    118Pumping fluid in closed circuit:
 This subclass is indented under subclass 56.  Processes wherein a fluid is pumped in a closed circuit, absorbing and rejecting heat.

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86+,in which pressure is reduced on a gas, the gas remaining as such during the cooling operation.
89+,and 98+, for processes involving circulation of an external fluid.
115+,for processes involving compressing, condensing and evaporating.
430+,particularly subclass 435 for apparatus utilizing an intermediate heat transfer fluid.
  
[List of Patents for class 62 subclass 119]    119Condensing and evaporating:
 This subclass is indented under subclass 56.  Processes comprising heat absorption in one area and heat dissipation in another area, and utilization of a fluid heat transfer medium moving between said area which medium changes state in each of said absorption and dissipation steps.

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51.1+,for apparatus comprising only a connected liquid receiver (condenser) and evaporator a cryostat.
115+,for processes involving compression, condensation and evaporation.
  
[List of Patents for class 62 subclass 120]    120Spaced cooling steps:
 This subclass is indented under subclass 56.  Processes in which the operations are physically or temporarily spaced.

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65,for diverse temperature treating of an article.
95,for plural steps of cooling air.
  
[List of Patents for class 62 subclass 121]    121Gas and liquid contact:
 This subclass is indented under subclass 56.  Processes in which cooling is effected by reasons of mutually contacting a gas and a liquid.

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304+,for related apparatus.
  
[List of Patents for class 62 subclass 122]    122Combining fluids having diverse temperatures:
 This subclass is indented under subclass 56.  Processes in which streams of fluids having diverse temperatures are combined.

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97,for similar processes wherein the streams are air streams.
  
[List of Patents for class 62 subclass 123]    123SEPARATOR FOR SOLIDIFIED CONSTITUENT OF LIQUID MIXTURE:
 This subclass is indented under the class definition.  Apparatus having means to separate a constituent of a liquid mixture by cooling it, e.g., congealing the constituent, and means to remove the congealed constituent from the liquid.

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317+,for means separating a constituent or portion from a fluid by filtration or gravitational separation.
532+,for related processes.

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117, Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor,   for processes and non-coating apparatus for growing therein-defined single-crystal of all types of materials, including inorganic or organic, including those having refrigeration steps or means.
159, Concentrating Evaporators,   subclass 45 for evaporating apparatus for graining and separating crystals.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,   subclasses 245.1+ for non-coating crystallization apparatus not including chemical reaction means, not including refrigeration means, and not provided for elsewhere, and subclasses 129+ for non-coating crystallization apparatus which include means for a chemical reaction, which may or may not include refrigeration means, and which are not provided for elsewhere.
  
[List of Patents for class 62 subclass 124]    124With heater for liquid mixture container:
 This subclass is indented under subclass 123.  Apparatus including means for heating a liquid mixture container.
  
[List of Patents for class 62 subclass 125]    125WITH INDICATOR OR TESTER:
 This subclass is indented under the class definition.  Apparatus provided with an indicator or testing means.

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246+,for apparatus which merely displays a commodity within a cooled compartment.

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137, Fluid Handling,   subclasses 551+ for a fluid system of general application with an indicator or tester.
340, Communications: Electrical,   subclass 585 for electrical indicating systems automatically responsive to the thermal condition of refrigerated storage.
  
[List of Patents for class 62 subclass 126]    126Operatively correlated with automatic control:
 This subclass is indented under subclass 125.  Apparatus in which there is operative correlation between indicating and automatic refrigeration control means.
  
[List of Patents for class 62 subclass 127]    127Diverse function indicators or testers:
 This subclass is indented under subclass 125.  Apparatus comprising a plurality of different function indicating or testing means.

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340, Communications: Electrical,   subclasses 521+ for electrical automatic indicating systems responsive to plural diverse conditions.
  
[List of Patents for class 62 subclass 128]    128Atmospheric condensation accumulation, e.g., frost:
 This subclass is indented under subclass 125.  Apparatus in which the presence of atmospheric condensate is indicated.

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340, Communications: Electrical,   subclass 580 for electrical automatic indicating systems responsive to ice formation.
  
[List of Patents for class 62 subclass 129]    129Condition sensing:
 This subclass is indented under subclass 125.  Apparatus which automatically responds to a variable condition.

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125,for a gauge glass which enables movement of a refrigerant to be observed.

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340, Communications: Electrical,   subclasses 500+ for electrical automatic condition responsive indicating systems.
  
[List of Patents for class 62 subclass 130]    130External cooled material:
 This subclass is indented under subclass 129.  Apparatus in which the condition is material being cooled.
  
[List of Patents for class 62 subclass 131]    131Position or extent of motion of movable element :
 This subclass is indented under subclass 125.  Apparatus in which the position or extent of motion of a movable element is indicated.

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340, Communications: Electrical,   subclasses 686.1+ for electrical automatic indicating systems responsive to position.
  
[List of Patents for class 62 subclass 132]    132AUTOMATIC CONTROL:
 This subclass is indented under the class definition.  Apparatus comprising means to sense an operating condition or change of operating condition and exert a control on cooling means or means handling material cooled or to be cooled.

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126,for an indicator or tester correlated with automatic control.
231+,for a time or program actuator.

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137, Fluid Handling,   appropriate subclass for automatic control of fluid handling of general application, particularly subclasses 59+ for freeze responsive safety means and subclasses 78+ for atmospheric condition change responsive control.
165, Heat Exchange,   subclass 200 for automatic control of a heat exchanger not specialized by structure to refrigeration.
236, Automatic Temperature and Humidity Regulation,   appropriate subclass for an automatic temperature regulation system.
  
[List of Patents for class 62 subclass 133]    133Responsive to vehicle body motion or traction:
 This subclass is indented under subclass 132.  Apparatus responsive to any phase of motion of a vehicle.

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215,226+ and 228, for refrigerator-compressor drive control or response even though the drive is a vehicle motor.
  
[List of Patents for class 62 subclass 134]    134Electrical generator:
 This subclass is indented under subclass 133.  Apparatus including an electrical motor-generator.
  
[List of Patents for class 62 subclass 135]    135By congealed removable product condition:
 This subclass is indented under subclass 132.  Apparatus comprising means responsive to a change of condition of a consumable product undergoing congelation.
  
[List of Patents for class 62 subclass 136]    136By change of consistency, e.g., viscosity or overrun:
 This subclass is indented under subclass 135.  Apparatus in which the condition is a change of consistency.
  
[List of Patents for class 62 subclass 137]    137By accumulation of product
 This subclass is indented under subclass 135.  Apparatus in which the sensing means responds to an accumulation of the congealed product.

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139+,for condition sensing control by other accumulation, e.g., frost on a freezing surface, i.e., apparatus not having mechanical means to remove the accumulation.
  
[List of Patents for class 62 subclass 138]    138On heat absorber:
 This subclass is indented under subclass 137.  Apparatus wherein the accumulation is on a cooled surface.
  
[List of Patents for class 62 subclass 139]    139By accumulation on freezing surface, e.g., ice:
 This subclass is indented under subclass 132.  Apparatus responsive to the accumulation of congealed material on a freezing surface.

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135,for a similar control related to means manufacturing and removing or working a congealed consumable product.
  
[List of Patents for class 62 subclass 140]    140By frost, i.e., atmospheric condensate:
 This subclass is indented under subclass 139.  Apparatus in which the condition sensed is the accumulation of frozen atmospheric condensate.

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151+,for other automatic handling of frost.

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250, Radiant Energy,   subclass 215 for photocell control with a specific art device there provided for.
  
[List of Patents for class 62 subclass 141]    141Of closed system sorbent type:
 This subclass is indented under subclass 132.  Apparatus controlling a refrigeration producer utilizing a sorbent for the refrigerant.

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101+,for processes of refrigeration utilizing a sorbent.
  
[List of Patents for class 62 subclass 142]    142Discontinuous operation of refrigerant or sorbent container unit:
 This subclass is indented under subclass 141.  Apparatus in which a refrigerant or sorbent containing element is caused to be intermittently and repeatedly subjected to generating-condensing pressure and absorbing-evaporating pressure.
  
[List of Patents for class 62 subclass 143]    143Of intermittent generator-sorber unit;
 This subclass is indented under subclass 142.  Apparatus wherein the sorbent container serves at one time as a still and at another time as a sorber.
  
[List of Patents for class 62 subclass 144]    144Plural unit sequence or alternation:
 This subclass is indented under subclass 143.  Apparatus comprising at least two sorbent containing units controlled for alternate or sequential generation or sorption.
  
[List of Patents for class 62 subclass 145]    145Serially connected type:
 This subclass is indented under subclass 144.  Apparatus in which the units are serially interconnected for refrigerant or absorbent flow from one to another.
  
[List of Patents for class 62 subclass 146]    146Of cooling fluid:
 This subclass is indented under subclass 143.  Apparatus wherein flow of cooling medium for a unit is controlled.

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481,for absorber-generator cooling structure, per se.
  
[List of Patents for class 62 subclass 147]    147Including sorbent refrigerant flow:
 This subclass is indented under subclass 146.  Apparatus in which sorbent or refrigerant flow is also controlled.
  
[List of Patents for class 62 subclass 148]    148Of heating means:
 This subclass is indented under subclass 141.  Apparatus including means to control the supply of heat to a sorbent regenerator.
  
[List of Patents for class 62 subclass 149]    149Withdrawing or adding refrigerant from or to normally closed system:
 This subclass is indented under subclass 132.  Apparatus which controls or responds to means adding or withdrawing refrigerant to or from a closed circuit type refrigeration system, relative to a source external of the system.

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174,for means collecting and discharging refrigerant batches within the system.
  
[List of Patents for class 62 subclass 150]    150Preventing, removing or handling atmospheric condensate:
 This subclass is indented under subclass 132.  Apparatus which is responsive to or controls means which prevents, removes or handles atmospheric condensate.
  
[List of Patents for class 62 subclass 151]    151Defrosting:
 This subclass is indented under subclass 150.  Apparatus which relates to removal of frozen atmospheric condensate.

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140,for condition sensing control measuring frost accumulation.
162,for a control which resumes its function after manual initiation, e.g., manual initiation of defrosting means then the sensing control causes the refrigeration producer to resume operation.
234,for time or program actuated defrosting means.
  
[List of Patents for class 62 subclass 152]    152Limited area, e.g., preferred zone:
 This subclass is indented under subclass 151.  Apparatus in which the defrosting control acts to defrost a limited area of the space cooled or one section of a cooling means in preference to another, e.g., defrosting controls for two zone refrigerators.

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197+,for an evaporation by-pass control which may be similar in operation.
  
[List of Patents for class 62 subclass 153]    153By storage compartment closure actuated means:
 This subclass is indented under subclass 151.  Apparatus which responds to actuation of a storage compartment closure, e.g., a door.

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162,for means to manually initiate the operation of the sensing means.
267,for interlocked diverse function elements, e.g., door and refrigeration producer.
  
[List of Patents for class 62 subclass 154]    154By energy input actuated means:
 This subclass is indented under subclass 151.  Apparatus responsive to operation of the power input means of a refrigeration producer, e.g., motor or compressor.
  
[List of Patents for class 62 subclass 155]    155Including time or program actuator:
 This subclass is indented under subclass 151.  Apparatus with a timing or programming device.

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234,for a time or program actuated system.
  
[List of Patents for class 62 subclass 156]    156By temperature:
 This subclass is indented under subclass 151.  Apparatus including thermally responsive means.
  
[List of Patents for class 62 subclass 157]    157Time or program actuator:
 This subclass is indented under subclass 132.  Apparatus with a time or program actuator.
  
[List of Patents for class 62 subclass 158]    158Time delay of condition sensing or control operation:
 This subclass is indented under subclass 157.  Apparatus in which there is means delaying the normal operation of the automatic control.
  
[List of Patents for class 62 subclass 159]    159Selective heating or cooling:
 This subclass is indented under subclass 132.  Apparatus controlling, or responsive to, means selectively heating or cooling.

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324+,for a reversible heat pump and see the Notes thereto.
  
[List of Patents for class 62 subclass 160]    160Reversible cycle machine:
 This subclass is indented under subclass 159.  Apparatus comprising means to reverse flow through a refrigeration producing cycle so as to reverse the function of the heat absorbing or rejecting means of the cycle.
  
[List of Patents for class 62 subclass 161]    161With correlated manual or external operator and condition sensing means, e.g., cutoff or reset:
 This subclass is indented under subclass 132.  Apparatus so related to (1) manually operated means, or (2) other means external of the refrigeration producer, as to modify the manner of operation of the automatic control.
(1) Note. The term "manually actuated means" does not include starting or stopping means such as a line switch or means for adjusting a control point of a sensing means, e.g., adjustable thermostat.

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267,for interlocked diverse function elements, per se.
  
[List of Patents for class 62 subclass 162]    162Manual initiate with sensor terminate:
 This subclass is indented under subclass 161.  Apparatus in which an operative control cycle is initiated manually and is terminated automatically.

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153,for means determining a number of door operations to control defrosting.
  
[List of Patents for class 62 subclass 163]    163Selective:
 This subclass is indented under subclass 161.  Apparatus in which operation is under selective control, e.g., either by manual or automatic control.
  
[List of Patents for class 62 subclass 164]    164Manual reset or sensor operates additional element:
 This subclass is indented under subclass 161.  Apparatus in which a manual operator resets a condition sensing means and also sets or resets another control element.
  
[List of Patents for class 62 subclass 165]    165Solidified gas:
 This subclass is indented under subclass 132.  Apparatus controlling, or responsive to, means involving the use of a solidified gas (CO2).

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384+,for a material or space cooler using a solidified gas.
  
[List of Patents for class 62 subclass 166]    166Diverse control or response:
 This subclass is indented under subclass 165.  Apparatus having different control or response means.
  
[List of Patents for class 62 subclass 167]    167Of heater, heat transmitter or secondary fluid:
 This subclass is indented under subclass 165.  Apparatus in which (1) a heater, or (2) means varying heat transmission, is controlled.

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383,for refrigeration means utilizing variable thermal means.
  
[List of Patents for class 62 subclass 168]    168By temperature:
 This subclass is indented under subclass 165.  Apparatus which is temperature responsive, e.g., venting of the gas is thermostatically controlled.

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167,for thermostatic control of a heater, heat transmitter or secondary heat exchanging fluid.
  
[List of Patents for class 62 subclass 169]    169Vacuumized chamber with open outlet:
 This subclass is indented under subclass 132.  Apparatus which controls, or is responsive to, means having a chamber containing a liquid, or a wetted solid, e.g., lettuce.
(1) Note. The vapor may be condensed, heated and vaporized to supply the evacuating pump.

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100,for processes involving vacuumizing an open outlet chamber.
191,for automatic control of a closed cycle refrigeration producer having a jet-type compressor.
268+,for vacuumized open outlet chamber refrigeration apparatus.
  
[List of Patents for class 62 subclass 170]    170Evacuating means, e.g., jet pump:
 This subclass is indented under subclass 169.  Apparatus in which the sensing means controls, or responds to, the operation of the evacuating means.
  
[List of Patents for class 62 subclass 171]    171Gas-liquid contact cooler, fluid flow:
 This subclass is indented under subclass 132.  Apparatus controlling, or responding to, the flow of the gas or liquid of a gas-liquid contacting cooler.

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271,for an atmosphere and sorbent contacting cooler which may include a liquid sorbent.
304,for material cooling means, utilizing gas-liquid contact means.

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261, Gas and Liquid Contact Apparatus,   particularly subclasses 121+ for a gas-liquid contactor having no features for refrigeration.
  
[List of Patents for class 62 subclass 172]    172Air compessor, cooler and expander:
 This subclass is indented under subclass 132.  Apparatus controlling or responding to the operation of an air compressor-cooler-expander type refrigerant producer.

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401+,for an air-compressor-cooler expander machine.
  
[List of Patents for class 62 subclass 173]    173Of external fluid reheating:
 This subclass is indented under subclass 132.  Apparatus in which the means controlled utilizes some or all of the heat of a heat rejecting portion of the same or another refrigeration producer for reheating an external fluid which has been cooled, e.g., air.

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90,for processes of air cooling and reheating.
159+,for control of a selective heating or cooling refrigeration producer.
428,for an air cooler with means for heating air over a heat rejector.

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165, Heat Exchange,   subclass 223 for a refrigeration producer having a reheating means, other than a heat rejection portion of a refrigeration producer, that is controlled by a humidistat; and subclass 263 for such reheat means controlled by temperature.
  
[List of Patents for class 62 subclass 174]    174Trapping and discharging refrigerant batches :
 This subclass is indented under subclass 132.  Apparatus controlling, or responsive to, means trapping and retaining a quantity of liquefied refrigerant and which trapping means is actuated to intermittently discharge said refrigerant in batches.

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83,for processes of preventing refrigerant slugging.
84,for processes involving lubricant handling.
503,for a liquid trap in a refrigerant line.
509,for a condensed refrigerant receiver.
512,for a vapor-liquid separator and liquid recycle means.
  
[List of Patents for class 62 subclass 175]    175Diverse, cascade or compound refrigeration-producing system:
 This subclass is indented under subclass 132.  Apparatus controlling, or responsive to (1) a refrigeration producing system having diverse refrigeration producing means, (2) a refrigeration producing system in which the same refrigerant flows through two pairs of elements in circuits which are interconnected for fluid flow between them, or (3) a refrigeration system having circuits isolating the fluid in one from the other and having at least two similar elements in each circuit.

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332+,for an ice and mechanical system.
335,for refrigeration producing elements in cascade.
  
[List of Patents for class 62 subclass 176.1]    176.1Humidity sensor:
 This subclass is indented under subclass 132.  Apparatus which senses moisture in the air to be refrigerated.

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73, Measuring and Testing,   subclasses 29.02+ for an hygrometer.
236, Automatic Temperature and Humidity Regulation,   subclass 44 for a humidity control of general utility.
  
[List of Patents for class 62 subclass 176.2]    176.2Having defrost control related to humidity:
 This subclass is indented under subclass 176.1.  Apparatus in which the sensed humidity of the cooled space exerts at least a partial control of some phase of a defrosting operation.
(1) Note. In a nominally time controlled defroster, the intervals of defrosting are directly proportional to the humidity level.

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151+,for automatic control of defrosting.
  
[List of Patents for class 62 subclass 176.3]    176.3Controlling variable compressor capacity:
 This subclass is indented under subclass 176.1.  Apparatus in which the output of a compressor is varied in response to the sensed humidity, e.g., unloading variable speed, compressor staging, etc.

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510,for plural compressors.

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236, Automatic Temperature and Humidity Regulation,   subclass 1 for automatic control of refrigeration systems by multistage controls.
307, Electrical Transmission or Interconnecting Systems,   subclass 39 for condition responsive plural load circuits.
  
[List of Patents for class 62 subclass 176.4]    176.4Controlling gas-liquid contactor for air:
 This subclass is indented under subclass 176.1.  Apparatus which there is an air-liquid contactor controlled at least in part by an air humidity sensor, e.g., evaporative type cooler.

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165, Heat Exchange,   subclass 226 for control of a gas-liquid fluid control by humidity sensor.
  
[List of Patents for class 62 subclass 176.5]    176.5Control of air heater, e.g., reheat pump:
 This subclass is indented under subclass 176.1.  Apparatus in which there is provided a means to regulate an air heater, e.g., reheat, to control the humidity in the ambient air.

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90,for methods involving reheating.
173,for automatic control of reheating.
  
[List of Patents for class 62 subclass 176.6]    176.6Plus air temperature sensor exerting a control:
 This subclass is indented under subclass 176.1.  Apparatus in which an air temperature sensor acts in conjunction with the air humidity sensor to exert a control; the air temperature sensor could be alternative to or modifying the air humidity sensor.

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236, Automatic Temperature and Humidity Regulation,   subclass 44 for systems in which the temperature and humidity are controlled.
  
[List of Patents for class 62 subclass 177]    177Of external fluid or means:
 This subclass is indented under subclass 132.  Apparatus controlling a fluid other than a refrigerant, a cooled product or a product to be cooled.
  
[List of Patents for class 62 subclass 178]    178Diverse control or response:
 This subclass is indented under subclass 177.  Apparatus, (1) controlling a plurality of means, at least one handling a fluid or product, or (2) diverse function sensing means controlling an external fluid or means.
  
[List of Patents for class 62 subclass 179]    179Plural external fluids or means controlled:
 This subclass is indented under subclass 178.  Apparatus in which the plurality of controlled means are external of the refrigeration producer.
  
[List of Patents for class 62 subclass 180]    180External fluid and refrigeration producer:
 This subclass is indented under subclass 178.  Apparatus controlling fluid external of cooling means and a refrigeration producer or operative element thereof.
  
[List of Patents for class 62 subclass 181]    181Condenser cooling fluid flow:
 This subclass is indented under subclass 180.  Apparatus controlling flow of a condenser cooling fluid.

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183+,for other automatic control of or by cooling fluid for a heat rejector.
  
[List of Patents for class 62 subclass 182]    182Sequential:
 This subclass is indented under subclass 180.  Apparatus in which the controls are arranged so that they operate in a determined sequence.

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181,for diverse control or response related to condenser cooling.
  
[List of Patents for class 62 subclass 183]    183Cooling fluid for heat rejecter, e.g., condenser:
 This subclass is indented under subclass 177.  Apparatus controlling the fluid which cools a heat rejective element of a refrigeration producer.

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181,for condenser cooling fluid control and refrigeration producer control or response and see the Notes thereto.
  
[List of Patents for class 62 subclass 184]    184By refrigerant:
 This subclass is indented under subclass 183.  Apparatus responsive to a condition of a refrigerant within a refrigeration producer, e.g., temperature or pressure.
  
[List of Patents for class 62 subclass 185]    185Indirect heat transfer liquid, e.g., brine:
 This subclass is indented under subclass 177.  Apparatus responsive to, or controlling, flow of an indirect heat transferring coolant, e.g., brine.

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430+,for a cooling system using an intermediate fluid or holdover.
  
[List of Patents for class 62 subclass 186]    186Air controller or director:
 This subclass is indented under subclass 177.  Apparatus controlling, or responsive to, means forcing, directing or allowing flow of air.

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404+,for cooling means having a controller or director, per se.
  
[List of Patents for class 62 subclass 187]    187Damper between storage compartments:
 This subclass is indented under subclass 186.  Apparatus in which the movement of an air circulation controlling damper between compartments is controlled.
  
[List of Patents for class 62 subclass 188]    188By lever, e.g., float-controlled valve:
 This subclass is indented under subclass 177.  Apparatus controlled by fluid level, e.g., a valve is controlled by a float.

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137, Fluid Handling,   subclasses 386+ , particularly subclasses 410+ for a float controlled valve.
  
[List of Patents for class 62 subclass 189]    189By fluid flow, e.g., check valve:
 This subclass is indented under subclass 177.  Apparatus responsive to, or controlling, the flow of the external fluid, e.g., a check valve.

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137, Fluid Handling,   subclasses 511+ for a check valve.
  
[List of Patents for class 62 subclass 190]    190Refrigeration producer:
 This subclass is indented under subclass 132.  Apparatus responsive to or controlling, a refrigeration producer.

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467+,for a refrigeration producer.
  
[List of Patents for class 62 subclass 191]    191Of or by jet-type compressor:
 This subclass is indented under subclass 190.  Apparatus in which the sensing means controls or responds to a closed type refrigeration producer employing a jet type compressor.

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170,for automatic control of means evacuating an open outlet chamber.

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417, Pumps,   subclasses 182+ for jet pump regulation.
  
[List of Patents for class 62 subclass 192]    192Lubrication:
 This subclass is indented under subclass 190.  Apparatus controlling, or responsive to, a condition of a lubricating means or the lubricant.
  
[List of Patents for class 62 subclass 193]    193Of or by compressor:
 This subclass is indented under subclass 192.  Apparatus in which the sensing means responds to or controls a refrigerant compressor.
  
[List of Patents for class 62 subclass 194]    194Lubricant aspirator in evaporator liquid level control chamber:
 This subclass is indented under subclass 192.  Apparatus in which there is a liquid chamber enclosing a liquid level operated fluid flow controller, e.g., valve, which chamber includes a refrigerant vapor outlet means and also means to cause lubricant to be entrained with the vapor passing through said outlet.

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218+,for a similar float operated liquid control.
  
[List of Patents for class 62 subclass 195]    195Impurity removal:
 This subclass is indented under subclass 190.  Apparatus controlling, or responsive to, means removing an undesired constituent, e.g., gas, from a refrigerant producer.
  
[List of Patents for class 62 subclass 196.1]    196.1Bypass, e.g., compressor unloading:
 This subclass is indented under subclass 190.  Apparatus controlling or responsive to, means allowing flow around either a refrigerant condenser, evaporator, compressor or a part of either, e.g., compressor unloading, or directing refrigerant flow to either of two or more evaporators or condensers arranged in parallel.

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117,for processes involving dividing refrigerant flow.
174,for control of trapping and discharging refrigerant batches. These devices often trap liquid from the evaporator outlet and feed it to the receiver.

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417, Pumps,   subclasses 279+ for condition responsive control of the fluid handled by a pump or compressor.
  
[List of Patents for class 62 subclass 196.2]    196.2For plural compressor cylinders:
 This subclass is indented under subclass 196.1.  Apparatus in which there is control of either a compressor unit or system comprising more than one compression chamber, e.g., multistage, multicylinder, etc.

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510,for plural compressors.

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236, Automatic Temperature and Humidity Regulation,   subclass 1 for refrigeration systems controlled multistage control.
  
[List of Patents for class 62 subclass 196.3]    196.3Direct bypass of compressor:
 This subclass is indented under subclass 196.1.  Apparatus in which the gas discharged from the compressor goes directly to the compressor suction, e.g., compressor unloading.

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417, Pumps,   subclasses 297+ for compressor unloading.
418, Rotary Expansible Chamber Devices,   subclass 14 for rotary expansible chamber compressor unloading.
  
[List of Patents for class 62 subclass 196.4]    196.4Condenser bypass:
 This subclass is indented under subclass 196.1.  Apparatus in which refrigerant is caused to bypass part or all of a condenser.
(1) Note. The condenser may be part of a condenser system having plural condensers.
  
[List of Patents for class 62 subclass 197]    197Of expansion zone:
 This subclass is indented under subclass 196.  Apparatus in which the refrigerant fluid bypasses a restrictor, evaporator or the suction line returning to a compressor.

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216+,for evaporation zone control or response, per se.
  
[List of Patents for class 62 subclass 198]    198Of serially arranged evaporator:
 This subclass is indented under subclass 197.  Apparatus in which evaporators are arranged for serial flow and the refrigerant fluid bypasses at least one of them.
  
[List of Patents for class 62 subclass 199]    199Through an evaporator, i.e., parallel:
 This subclass is indented under subclass 197.  Apparatus in which the bypass for refrigerant fluid around the evaporator is to another evaporator, i.e., the evaporators are in parallel.

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504,for means to apportion flow to evaporators.
525+,for an evaporator with plural distinct zones or sections.
  
[List of Patents for class 62 subclass 200]    200Individual flow controllers and sensors:
 This subclass is indented under subclass 199.  Apparatus in which the control means acts to cause flow through one or more of a plurality of evaporators in a selected order so that refrigerant is caused to flow to at least one evaporator in preference to another.
  
[List of Patents for class 62 subclass 201]    201By external cooled liquid or holdover:
 This subclass is indented under subclass 190.  Apparatus responsive to a condition, usually temperature, of an external liquid, e.g., withdrawable or heat transfer, (brine) or of a holdover.

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430+,for secondary liquid and holdover combinations, per se.
  
[List of Patents for class 62 subclass 202]    202Including external thermal source modifying sensor action:
 This subclass is indented under subclass 190.  Apparatus including thermal means not a part of the refrigeration producer or the means cooled by it so related to a sensor that it modifies its action.

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209+,for other plural sensors and single refrigeration producing elements with compensating or control features.
214+,for a single sensor mounted or formed to respond to plural conditions, e.g., compensated sensors.
  
[List of Patents for class 62 subclass 203]    203Plural refrigerating producing elements and plural sensors
 This subclass is indented under subclass 190.  Apparatus comprising a refrigeration producing system having plural operative elements and plural condition sensing means each responding to or controlling at least two of said elements.
  
[List of Patents for class 62 subclass 204]    204Including expansion valve or variable restrictor:
 This subclass is indented under subclass 203.  Apparatus in which at least one of the operative elements is an expansion or variable restrictor controlling the flow of the refrigerant.

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216+,for control of or by an evaporation zone in which there is a single control or single valve controlled.
  
[List of Patents for class 62 subclass 205]    205Plural variable restrictors in flow line:
 This subclass is indented under subclass 204.  Apparatus controlling a plurality of expansion valves or variable restrictors for a refrigerant.
  
[List of Patents for class 62 subclass 206]    206High and low side:
 This subclass is indented under subclass 205.  Apparatus in which both the high (expansion valve) and low side, (back pressure) restrictor or valve are controlled.
  
[List of Patents for class 62 subclass 207]    207Diverse function refrigeration elements controlled by single sensor:
 This subclass is indented under subclass 190.  Apparatus in which operative elements of a refrigeration producer having diverse functions are controlled by single sensing means.
  
[List of Patents for class 62 subclass 208]    208Single refrigeration producer controlled by plural sensors
 This subclass is indented under subclass 190.  Apparatus having plural sensing means which coact to control a single operative element of a refrigeration producer.
  
[List of Patents for class 62 subclass 209]    209Compensating or modifying:
 This subclass is indented under subclass 208.  Apparatus in which the plural sensing means act together to modify or compensate the action of one another.

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202,for external thermal source modifying sensor action.
214+,for a single sensor mounted or formed to respond to plural conditions, e.g., a compensated sensor.
  
[List of Patents for class 62 subclass 210]    210Expansion valve or variable restrictor:
 This subclass is indented under subclass 209.  Apparatus controlling a variable refrigerant flow valve or restrictor.

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222+,for an expansion valve or flow restrictor controlled by a single sensor.
  
[List of Patents for class 62 subclass 211]    211External condition sensor:
 This subclass is indented under subclass 210.  Apparatus in which at least one of the sensing elements responds to a condition external of the refrigeration producer.
  
[List of Patents for class 62 subclass 212]    212Plural sensors at low side
 This subclass is indented under subclass 210.  Apparatus in which the plural sensing elements each respond to a condition between expansion means and a suction source.
  
[List of Patents for class 62 subclass 213]    213Alternative or selective sensors:
 This subclass is indented under subclass 208.  Apparatus in which any one of the plurality of sensing means can alternatively or selectively control the element controlled.
  
[List of Patents for class 62 subclass 214]    214Single sensor mounted or formed to respond to plural conditions, e.g., compensators:
 This subclass is indented under subclass 190.  Apparatus in which a single sensing means is positioned or formed so as to be responsive to plural conditions.

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209+,for plural sensors modifying or compensating each other and controlling a single refrigeration producer.
  
[List of Patents for class 62 subclass 215]    215Controlling compressor or its drive, e.g., torque or speed:
 This subclass is indented under subclass 214.  Apparatus in which the sensing means controls an element in the compressor or its drive, e.g., its torque or speed.

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228+,for other sensing control of a compressor or its drive.
  
[List of Patents for class 62 subclass 216]    216Of or by evaporation zone:
 This subclass is indented under subclass 190.  Apparatus controlling or responding to the condition of an element between or at the outlet of a liquefied refrigerant source, e.g., condenser or receiver, and to the means withdrawing a vapor, e.g., compressor.
  
[List of Patents for class 62 subclass 217]    217Back flow or pressure regulator:
 This subclass is indented under subclass 216.  Apparatus in which the fluid condition in the evaporator is regulated by a variable restrictor between the evaporator outlet and the inlet (suction side) of the compressor.
  
[List of Patents for class 62 subclass 218]    218Valve or restrictor by liquid lever:
 This subclass is indented under subclass 216.  Apparatus in which a valve or variable flow restrictor is controlled by refrigerant liquid level.

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194,for float means controlling an evaporator and means entraining lubricant in refrigerant vapors.
  
[List of Patents for class 62 subclass 219]    219Low side float:
 This subclass is indented under subclass 218.  Apparatus wherein there is a float which responds to a liquid level in a chamber in which the pressure is that between expansion means and a source of suction (compressor).
  
[List of Patents for class 62 subclass 220]    220Float chamber at suction line:
 This subclass is indented under subclass 219.  Apparatus in which the suction line opens directly into the float chamber.
  
[List of Patents for class 62 subclass 221]    221Valve isolated from float chamber:
 This subclass is indented under subclass 220.  Apparatus in which the flow controlling valve is in a chamber separated by an isolating partition from the chamber containing the float.
  
[List of Patents for class 62 subclass 222]    222Of expansion valve or variable restrictor:
 This subclass is indented under subclass 216.  Apparatus in which the device controlled is a valve or variable restrictor of an expansion device.

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194,197+, 204+, and 218, for other sensing control of expansion means with a variable restrictor.
528,for an evaporator with an adjustable flow controller.

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236, Automatic Temperature and Humidity Regulation,   appropriate subclass, particularly subclasses 67+ for a thermostatically controlled valve of more general application.
  
[List of Patents for class 62 subclass 223]    223By external condition:
 This subclass is indented under subclass 222.  Apparatus responsive to a condition external of the refrigeration producing means.

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177+,for means controlling an external fluid or means, particularly subclasses 180+ for such means combined with a refrigeration producer control.
  
[List of Patents for class 62 subclass 224]    224By condition at low side:
 This subclass is indented under subclass 222.  Apparatus responsive to a condition on the low side, i.e., between expansion means and a source of suction.

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206,for high and low side response.
212,for plural sensors on the low side.
  
[List of Patents for class 62 subclass 225]    225At or beyond evaporator outlet, i.e., superheat:
 This subclass is indented under subclass 224.  Apparatus in which the condition is the one prevailing at or beyond an evaporator outlet, i.e., the condition of the vapor after evaporation is complete.
  
[List of Patents for class 62 subclass 226]    226Compressor or its drive controlled:
 This subclass is indented under subclass 216.  Apparatus in which the compressor or its drive is controlled.

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228+,for other control of a compressor of or by sensing means.
  
[List of Patents for class 62 subclass 227]    227By conducted evaporator temperature:
 This subclass is indented under subclass 226.  Apparatus in which a temperature sensing means is in heat conducting relationship to an evaporator.

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374, Thermal Measuring and Testing,   subclasses 141+ , particularly subclass 147 for means mounting a temperature measuring device on a support.
  
[List of Patents for class 62 subclass 228.1]    228.1Compressor or its drive controlled:
 This subclass is indented under subclass 190.  Apparatus relating to a compressor or its drive.

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172,for control of or by an air compressing type refrigeration producer.
187+,particularly subclass 180, for diverse control or response involving control of an external fluid or means.
191,for control of or by a jet type compressor.
193+,for control of or by lubricating means.
196+,for control of or by a by-pass, e.g., compressor unloading.
215,for a single sensor responsive to plural conditions and controlling a compressor.
236+,for control of a compressor of or by evaporation zone condition.

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417, Pumps,   subclasses 1+ for condition responsive control of a pump or compressor drive motor, subclasses 212+ for condition responsive control of a pump or compressor drive transmission or displacement; subclasses 274+ for condition responsive control of the volumetric capacity of a pump or compressor; and subclasses 279+ for condition responsive control of the fluid handled by a pump or compressor.
  
[List of Patents for class 62 subclass 228.2]    228.2For ice or ice cream maker:
 This subclass is indented under subclass 228.1.  Apparatus in which the controlled compressor provides the refrigeration effect for a liquid under-going partial or full congelation.

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135,for automatic control of the congealed product condition.
  
[List of Patents for class 62 subclass 228.3]    228.3By refrigerant pressure:
 This subclass is indented under subclass 228.1.  Apparatus in which the compressor is controlled by a sensed condition of refrigerant pressure.
(1) Note. The sensed condition here may merely control the compressor in an on-off manner.

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417, Pumps,   subclass 38 for control of a pump by a liquid pressure sensor.
  
[List of Patents for class 62 subclass 228.4]    228.4By variable speed motor or pulley type mechanism:
 This subclass is indented under subclass 228.1.  Apparatus in which movement of the compressor working member is varied as a function of a sensed drive condition.

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215,for a compressor controlled by a single sensor responding to plural conditions.
  
[List of Patents for class 62 subclass 228.5]    228.5By variable compressor output (e.g., unloading, staging, etc.):
 This subclass is indented under subclass 228.1.  Apparatus in which the output of a single compressor or the combined output of a plurality of compressors is varied as a function of a sensed compressor operating condition, e.g., compressor unloading, compressor staging.

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176.3,for control of plural compressors controlled by humidity.
510,for plural compressors.

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236, Automatic Temperature and Humidity Regulation,   subclass 1 for refrigeration system staging.
  
[List of Patents for class 62 subclass 229]    229By external cooled gas:
 This subclass is indented under subclass 228.  Apparatus responsive to a condition of an external cooled ambient gas.
  
[List of Patents for class 62 subclass 230]    230By condition of power source:
 This subclass is indented under subclass 228.  Apparatus responsive to a condition of the compressor power source or drive.

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133+,for a control responsive to vehicle motion or traction feature, the traction feature generally being the prime mover for the refrigeration producer.
  
[List of Patents for class 62 subclass 231]    231TIME OR PROGRAM ACTUATOR:
 This subclass is indented under the class definition.  Apparatus whereby (1) the time in which or length of time taken to perform an operation is controlled, (2) there is either a fixed continuous sequential or fixed repetitive operation of means performing a treating operation, or (3) there is means terminating a single operation in a fixed position to restart an additional cycle, which cycle is more complex than a mere starting or stopping of a single device.

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155+,and 157+, for automatic control combined with time or program control.

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137, Fluid Handling,   subclasses 624.11+ for fluid handling of a more general utility with a program or time actuator.
200, Electricity: Circuit Makers and Breakers,   subclasses 19.01+ for a periodic switch, subclasses 33+ for a switch with an actuation retarder.
337, Electricity: Electrothermally or Thermally Actuated Switches,   subclasses 301+ for thermally actuated switches which are continuously driven or time controlled.
  
[List of Patents for class 62 subclass 232]    232Closed system sorbent type:
 This subclass is indented under subclass 231.  Apparatus relating to operation of a closed sorption type refrigeration producer.

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141+,for automatic control of a sorbent type refrigeration producer.
  
[List of Patents for class 62 subclass 233]    233Congelation product maker:
 This subclass is indented under subclass 231.  Apparatus relating to operation of congelation apparatus.

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135+,for control of a congelation product maker by product condition.
340+,for a congelation product maker, per se.
  
[List of Patents for class 62 subclass 234]    234Defrosting:
 This subclass is indented under subclass 231.  Apparatus relating to a defrosting operation of a refrigeration producer.

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140,and 151, for automatic control of defrosting.
  
[List of Patents for class 62 subclass 235]    235RINK:
 This subclass is indented under the class definition.  Apparatus designed for ice skating purposes.
  
[List of Patents for class 62 subclass 235.1]    235.1UTILIZING SOLAR ENERGY:
 This subclass is indented under the class definition.  Subject matter subjecting a material to the heat energy of the sun.

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34, Drying and Gas or Vapor Contact With Solids,   subclass 93 for a solar-heated drier.
60, Power Plants,   subclasses 641.1+ for a power plant operated by the sun.
126, Stoves and Furnaces,   subclasses 569+ and 714 for a solar heater.
  
[List of Patents for class 62 subclass 236]    236WITH ALTERNATELY USABLE ENERGY SOURCES:
 This subclass is indented under the class definition.  Apparatus having two energy sources actuating a refrigeration producer which sources are alternately usable.

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134,for means responsive to vehicle body motion or traction and including an electrical generator.
237,a separable ambulant cooled enclosure and a power source.

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307, Electrical Transmission or Interconnection Systems,   subclasses 64+ for substitute or emergency source electrical transmission or interconnecting systems.
  
[List of Patents for class 62 subclass 237]    237SEPARABLE AMBULANT COOLED ENCLOSURE AND POWER OR COOLING SOURCE:
 This subclass is indented under the class definition.  Apparatus comprising an ambulant enclosure, e.g., vehicle, which is cooled by connecting or placing it into juxtaposition with a cooling means or a power source for operating cooling means, e.g., for precooling of an enclosure.

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65,for sequential stage processes.
236,for alternatively usable energy sources.
298+,for repair, assembly or disassembly means.
448+,for a cooled enclosure with a contained movable unit of a refrigeration producing assembly.
  
[List of Patents for class 62 subclass 238.1]    238.1DISPARATE APPARATUS UTILIZED AS HEAT SOURCE OR ABSORBER:
 This subclass is indented under the class definition.  Apparatus in which (a) the heat of a disparate apparatus as an energy source for a refrigeration producer, or (b) the rejected heat of a refrigeration producer is used to heat a disparate apparatus.
(1) Note. A disparate apparatus herein is a nonrefrigerating or cooling means having a function other than merely serving as an energy source for the refrigeration producer.

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7,for apparatus and processes wherein a refrigerant is used as a fuel.
38+,for liquefied gas producing involving an expansion engine.
61,133+ and 241+, for operation involving motion of a vehicle.
79,for related processes or for processes involving exchanging heat between plural systems.
87,and 401+, for operations involving expanding a gas through an engine.
235.1,for means utilizing solar energy.
259.1+,particularly subclass 260 for a refrigerating system installed in or acting to cool a structure having a function other than merely enclosing a space or handling material.
277+,for means utilizing rejected heat to remove atmospheric condensate.
322,for disparate serially arranged product treating means.
323.1+,for another internal-combustion engine and refrigeration producing combination.
324.1+,for a reversible cycle machine.
501,for apparatus using an external fluid as a power source and as a heat exchanging fluid.
532+,and 123+, for processes and apparatus for solidifying a liquid fraction which may include using waste heat to thaw a frozen constituent.

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123, Internal-Combustion Engines,   subclass 41.19 for an internal-combustion engine cooled by a refrigeration cycle.
  
[List of Patents for class 62 subclass 238.2]    238.2With vortex tube, thermoelectric, stirling or air cycle:
 This subclass is indented under subclass 238.1.  Apparatus in which there is refrigeration produced by a vortex tube, thermoelectric cycle, Stirling cycle or an air cycle.

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5,for refrigeration devices comprising a vortex tube.
6,for refrigeration devices comprising a Stirling cycle.
86+,and 401+, for refrigeration system including an internal-combustion engine and not using a compressor.
235.1,for refrigeration devices comprising a thermoelectric cycle utilizing solar energy.
324.2,for a diverse reversible refrigeration system.
  
[List of Patents for class 62 subclass 238.3]    238.3With sorption:
 This subclass is indented under subclass 238.1.  Apparatus wherein refrigeration is produced by utilizing a sorbent for a refrigeration fluid.
(1) Note. The sorbent being usually a fluid but may be a solid.

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101+,for processes of sorption.
235.1,for refrigerant systems utilizing solar energy.
476+,for sorption apparatus.

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165, Heat Exchange,   subclasses 62 and 63 for heating and cooling with sorption systems.
  
[List of Patents for class 62 subclass 238.4]    238.4With power vapor generator:
 This subclass is indented under subclass 238.1.  Apparatus wherein the energy for driving the refrigeration system is derived at least in part by the making of vapor, e.g., Rankine cycle, jet pump.

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500,for jet pumps powered by refrigerant circuit fluid.
501,for an external fluid actuating a compressor and exchanging heat.

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60,