US PATENT SUBCLASS 202 / 269
.~.~ Air and gas seals

Current as of: June, 1999
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202 /   HD   DISTILLATION: APPARATUS

81  DF  APPARATUS {4}
239  DF  .~ Elements {10}
269.~.~ Air and gas seals

DEFINITION

Classification: 202/269

Miscellaneous devices for preventing access or exit of air or gas to the chambers and pipes of the apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:

255+,

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

242, for drying apparatus having means to seal an opening against gas or vapor leakage and providing for feeding material through the opening.

220, Receptacles,

228,.