US PATENT SUBCLASS 34 / 226
.~.~.~ Tortuous gas or vapor path


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}
226.~.~.~ Tortuous gas or vapor path


DEFINITION

Classification: 34/226

(under subclass 218) Apparatus having means for causing the treating gas or vapor to move through the treating chamber in other than a rectilinear path (as a spiral, helical or zigzag path).

(1) Note. Complete the search on tortuous treating gas or vapor path in this class, subclasses 199, 203 and 209 and their indented subclasses, particularly subclasses 212, 215 through 217 and 223. In subclass 209 and indented subclasses the flow is through distinct material compartments.

SEE OR SEARCH THIS CLASS, SUBCLASS:

229, 230, and 231.