US PATENT SUBCLASS 34 / 140
.~.~ Vapor exhaust

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

523  DF  APPARATUS {40}
108  DF  .~ Rotary drums or receptacles {7}
140.~.~ Vapor exhaust {1}
141  DF  .~.~.~> Axial treated material feed type

DEFINITION

Classification: 34/140

(under subclass 108) Apparatus having means to exhaust the gases or vapors generated or evolved from the solid material undergoing treatment.

(1) Note. Exhaust means does not include an open end but does include foraminous walls.