US PATENT SUBCLASS 34 / 81
.~.~.~.~ In or forming walls, ceiling, or floor

Current as of: June, 1999
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34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

523  DF  APPARATUS {40}
72  DF  .~ With means to treat gas or vapor {3}
79  DF  .~.~ Separation of substances from treating or exhaust gases or vapors {2}
80  DF  .~.~.~ By absorbent {1}
81.~.~.~.~ In or forming walls, ceiling, or floor

DEFINITION

Classification: 34/81

(under subclass 80) Apparatus in which the absorbing means are in or form part of the treating chamber walls, floor or ceiling.