US PATENT SUBCLASS 62 / 89
.~ Circulating external gas

Current as of: June, 1999
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62 /   HD   REFRIGERATION

56  DF  PROCESSES {28}
89.~ Circulating external gas {6}
90  DF  .~.~> With reheating
91  DF  .~.~> With adding of moisture {1}
93  DF  .~.~> With removing of moisture {1}
95  DF  .~.~> Plural cooling, e.g., precooling by exhaust
96  DF  .~.~> Indirect cooling using closed circuit heat transfer fluid
97  DF  .~.~> Combining streams having diverse temperatures

DEFINITION

Classification: 62/89

(under subclass 56) Processes in which a gas external of a refrigeration producer is caused to circulate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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

404+, for related apparatus.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids, 428, for a process of cooling solids by mere contact with a gas, and see notes in the definition of this subclass.