US PATENT SUBCLASS 220 / 374
.~.~.~ Tortuous passage

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
367.1  DF  .~ Vent in closure {4}
373  DF  .~.~ With means to prevent escape of contents through vent {1}
374.~.~.~ Tortuous passage

DEFINITION

Classification: 220/374

(under subclass 373) Device wherein a tortuous or serpentine passage prevent the receptacle contents from escaping through the vent or opening.

SEE OR SEARCH THIS CLASS, SUBCLASS:

745, for a vent structure attached to the container body.