US PATENT SUBCLASS 383 / 45
.~.~.~ With vent

Current as of: June, 1999
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383 /   HD   FLEXIBLE BAGS

42  DF  WITH CLOSURE {16}
43  DF  .~ Self-closing type {1}
44  DF  .~.~ Responsive to content (e.g., valve) {8}
45.~.~.~ With vent

DEFINITION

Classification: 383/45

With vent:

(under subclass 44) Subject matter wherein the bag further includes means for relieving any pressure differential between the bag interior and exterior.

(1) Note. A bag having a vent which allows the escape of air while the bag is being filled is classified here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

100+, for a nonvalve bag with a vent.