US PATENT SUBCLASS 34 / 471
.~.~.~.~ Regulating temperature of gas or vapor

Current as of: June, 1999
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34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

282  DF  PROCESS {24}
443  DF  .~ Gas or vapor contact with treated material {17}
467  DF  .~.~ Treatment of gas or vapor {6}
468  DF  .~.~.~ Condensation of gas or vapor {2}
471.~.~.~.~ Regulating temperature of gas or vapor

DEFINITION

Classification: 34/471

Regulating temperature of gas or vapor:

(under subclass 468) Process involving any combination of: (a) using a gas or vapor at particular temperatures; (b) employing a step or steps to maintain particular temperatures; (c) employing a plurality of different temperatures of either the same or different gas or vapor treating media; (d) heating the gas or vapor a plurality of times.

(1) Note. Mere specification that the gas is heated or the mere step of heating does not cause classification here; see appropriate subclass below.

(2) Note. Since hot gases or vapors contacting cooler material are necessarily cooled, the statement of such fact does not cause classification here. The different temperatures must be the temperatures before contact.