US PATENT SUBCLASS 428 / 478.2
.~.~ Natural source-type polyamide (e.g., casein, gelatin, etc.)

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

411.1  DF  COMPOSITE (NONSTRUCTURAL LAMINATE) {25}
474.4  DF  .~ Of polyamide {8}
478.2.~.~ Natural source-type polyamide (e.g., casein, gelatin, etc.) {1}
478.4  DF  .~.~.~> Next to cellulosic {1}

DEFINITION

Classification: 428/478.2

Natural source-type polyamide (e.g., casein, gelatin, etc.):

(under subclass 474.4) Product wherein the polyamide is characterized by a structure obtained by polymerization of an alpha-amino acid, that is, having a single carbon, usually substituted, between the carbonamide groups which make up the polymer backbone.