US PATENT SUBCLASS 428 / 35.4
.~.~ Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

34.1  DF  HOLLOW OR CONTAINER TYPE ARTICLE (E.G., TUBE, VASE, ETC.) {7}
35.2  DF  .~ Nonself-supporting tubular film or bag (e.g., pouch, envelope, packet, etc.) {3}
35.4.~.~ Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit

DEFINITION

Classification: 428/35.4

Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit:

(under subclass 35.2) Article* which contains a claimed vapor or gas barrier property and/or contains a polymer of vinyl chloride and/or vinylidene chloride, or a polymer containing a vinyl alcohol unit.

(1) Note. If unclear as to whether vapor and gas barrier properties are present from the claims, but the specification recites the presence, place the original in the appropriate subclass according to the claims and generally cross to this subclass.