US PATENT SUBCLASS 34 / 219
.~.~.~ 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}
201  DF  .~ Houses, kilns, and containers {6}
218  DF  .~.~ With gas or vapor circulation for contact with treated material {8}
219.~.~.~ Recirculation of treating gas or vapor {5}
220  DF  .~.~.~.~> Caused by heater action only
221  DF  .~.~.~.~> Caused by jet action
222  DF  .~.~.~.~> Movable gas or vapor distributor
223  DF  .~.~.~.~> Plural gas or vapor forcing means
224  DF  .~.~.~.~> Plural gas or vapor inlets and/or outlets {1}

DEFINITION

Classification: 34/219

(under subclass 218) Apparatus including means to recirculate the treating gas or vapor in whole or part.

(1) Note. The following apparatus subclasses include recirculation of the treating gas or vapor: 565+, 576+, 77, 78, 84, 100, 114, 115, 122, 131, 629+, and indented subclasses, 169, 181, 182, 187+, 191, 196, 212, and 213.