US PATENT SUBCLASS 215 / 260
.~ With pressure-responsive valve

Current as of: June, 1999
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215 /   HD   BOTTLES AND JARS

200  DF  CLOSURES {32}
260.~ With pressure-responsive valve

DEFINITION

Classification: 215/260

(under subclass 200) Devices, wherein the closure is (1) provided with a valve means which is automatically responsive to a positive pressure within the receptacle, or (2) the closure itself acts as a valve and moves responsive to internal pressure.