US PATENT SUBCLASS 215 / 261
.~ Barrier permeable to gas and impermeable to liquid

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

200  DF  CLOSURES {32}
261.~ Barrier permeable to gas and impermeable to liquid

DEFINITION

Classification: 215/261

(under subclass 200) Devices, wherein gas enters or escapes from a receptacle by flowing through a member impervious to liquid.

(1) Note. Aged or very dry cork may naturally be permeable to gas and impermeable to liquid. The mere usage of cork in a closure, without a clear indication that the cork was used for this quality, will not permit classification in this subclass.