US PATENT SUBCLASS 34 / 227
.~.~.~ Gas or vapor flow toward or from treated material entrance or exit

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}
227.~.~.~ Gas or vapor flow toward or from treated material entrance or exit {1}
228  DF  .~.~.~.~> Countercurrent to treated material motion only

DEFINITION

Classification: 34/227

(under subclass 218) Apparatus in which the treating gas or vapor flows through the treating chamber (1) from either the treated material entrance or exit toward opposite end, or (2) is introduced at some intermediate point and flows toward either the treated material entrance or exit, or (3) both.

SEE OR SEARCH THIS CLASS, SUBCLASS:

209, and indented subclasses, particularly subclasses 215 through 217 and 226 and in subclass 203 and indented subclasses.