US PATENT SUBCLASS 220 / 203.03
.~.~.~ Liquid trap

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
202  DF  .~ With condition responsive vent or valve {1}
203.01  DF  .~.~ Responsive to pressure {10}
203.03.~.~.~ Liquid trap

DEFINITION

Classification: 220/203.03

Liquid trap:

(under subclass 203.01) Device wherein the vent or valve includes a liquid barrier through which the contents of the receptacle must pass if such contents are to be passed into the atmosphere.