US PATENT SUBCLASS 210 / 218
.~.~ Gas removed from closed tank

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

198.1  DF  WITH MEANS TO ADD TREATING MATERIAL {5}
209  DF  .~ Directly applied to separator {5}
218.~.~ Gas removed from closed tank

DEFINITION

Classification: 210/218

(under subclass 209) Apparatus provided with means to remove gases or vapors from a liquid treating tank which is closed except for fluid handling inlets and/or outlets.

SEE OR SEARCH THIS CLASS, SUBCLASS:

472, for a vented filter.