US PATENT SUBCLASS 210 / 436
.~.~ Vented

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

348  DF  FILTER {25}
435  DF  .~ Within flow line or flow line connected close casing {9}
436.~.~ Vented

DEFINITION

Classification: 210/436

(under subclass 435) Apparatus wherein means for venting the casing is provided.