US PATENT SUBCLASS 220 / 240
.~ With seal means biased by internal pressure

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
240.~ With seal means biased by internal pressure

DEFINITION

Classification: 220/240

(under subclass 200) Devices wherein the gasket or seal is biased into sealing engagement between the closure and receptacle opening by means of fluid pressure generated from or contained within the receptacle.