US PATENT SUBCLASS 220 / 580
.~ Vent means through closure-like member

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


220 /   HD   RECEPTACLES

578  DF  INTERNAL CLOSURE-LIKE MEMBER WHICH RESTS ON THE UNUSED CONTENTS OF A CONTAINER {2}
580.~ Vent means through closure-like member

DEFINITION

Classification: 220/580

Vent means through closure-like member:

(under subclass 578) Device wherein the closure-like member includes an air passage therein which allows for pressure equalization on opposite sides of the closure-like member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

367.1+, for similar vent means in a removable closure.