US PATENT SUBCLASS 34 / 169
.~.~.~ 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}
165  DF  .~ Gravity flow type {7}
168  DF  .~.~ With gas or vapor flow for contact with treated material {4}
169.~.~.~ Recirculation of treating gas or vapor

DEFINITION

Classification: 34/169

(under subclass 168) Apparatus including pro- vision for recirculating the treating gas or vapor in whole or part.

(1) Note. See (1) Note to subclass 219 of this class for other subclasses involving recirculation of the treating gas or vapor.