US PATENT SUBCLASS 428 / 36.6
.~.~ 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}
35.7  DF  .~ Polymer or resin containing (i.e., natural or synthetic) {9}
36.6.~.~ Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit {1}
36.7  DF  .~.~.~> Vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit is sandwiched between layers (continuous layer)

DEFINITION

Classification: 428/36.6

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

(under subclass 35.7) Article* which contains a vapor or gas barrier property, contains a polymer derived from vinyl chloride and/or vinylidene chloride, and/or contains a polymer with a vinyl alcohol unit.

(1) Note. See subclass 35.4, Note (1) for cases where it is unclear from the claims whether vapor and gas barrier properties are present.