US PATENT SUBCLASS 131 / 201
.~.~.~ Material separator and trap

Current as of: June, 1999
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131 /   HD   TOBACCO

329  DF  TOBACCO USERS' APPLIANCE {8}
330  DF  .~ Device used for smoking {21}
200  DF  .~.~ Smoke treating {1}
201.~.~.~ Material separator and trap {7}
202  DF  .~.~.~.~> Filter and/or absorber {3}
209  DF  .~.~.~.~> Spiral passage
210  DF  .~.~.~.~> Serial checks or baffles
211  DF  .~.~.~.~> Chamber enclosed tubes or nipples {1}
213  DF  .~.~.~.~> Plural reversely extending passages
214  DF  .~.~.~.~> Bowl detachable from neck cup
215.1  DF  .~.~.~.~> With valve in smoke path or removable, external passage closure {2}

DEFINITION

Classification: 131/201

(under subclass 200) Smoking devices comprising means for separating and retaining a constituent from the smoke.

(1) Note. The patents in this and the indented subclasses must provide a trap chamber. Where only the structure of the smoke passage is claimed, even though such smoke passage is disclosed as providing for the separation of ingredients from the smoke, but no trap chamber for the separated ingredients is used, the patents are placed in this class, subclasses 216+. A filter or absorber is considered to be a trap chamber for this definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

331+, for smoke separators or treaters.