US PATENT SUBCLASS 34 / 131
.~.~.~ 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}
108  DF  .~ Rotary drums or receptacles {7}
130  DF  .~.~ With gas or vapor flow for contact with treated material {5}
131.~.~.~ Recirculation of treating gas or vapor

DEFINITION

Classification: 34/131

(under subclass 130) Apparatus including means to recirculate the treating gas or vapor.

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