US PATENT SUBCLASS 34 / 218
.~.~ With gas or vapor circulation for contact with treated material

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.~.~ With gas or vapor circulation for contact with treated material {8}
219  DF  .~.~.~> Recirculation of treating gas or vapor {5}
226  DF  .~.~.~> Tortuous gas or vapor path
227  DF  .~.~.~> Gas or vapor flow toward or from treated material entrance or exit {1}
229  DF  .~.~.~> Movable gas or vapor distributor
230  DF  .~.~.~> Plural gas or vapor forcing means
231  DF  .~.~.~> Deflecting baffle in treating chamber
232  DF  .~.~.~> Plural gas or vapor inlets and/or outlets {1}
234  DF  .~.~.~> Caused by heater only

DEFINITION

Classification: 34/218

(under subclass 201) Apparatus including means to contact the material undergoing treatment with a gas or vapor.

SEE OR SEARCH CLASS

432, Heating,

201+, for a work chamber supporting work to be transversed by a steam of air heated indirectly by a specific combustion device.