US PATENT SUBCLASS 34 / 78
.~.~.~ Recirculation of treating gas or vapor

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

523  DF  APPARATUS {40}
72  DF  .~ With means to treat gas or vapor {3}
73  DF  .~.~ By vapor condensation {4}
78.~.~.~ Recirculation of treating gas or vapor

DEFINITION

Classification: 34/78

(under subclass 73) Apparatus in which the treating gases or vapors are recirculated in whole or part due to the thermosyphonic action of the condensing and/or heating means.

(1) Note. For other subclasses involving recirculation of the treating gases or vapors, see (1) Note to subclass 219 of this class.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220, for similar apparatus not including condensers.