US PATENT SUBCLASS 526 / 199
.~.~.~ Material contains polypeptide, e.g., protein, gelatin, etc.

Current as of: June, 1999
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526 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {8}
72  DF  .~ POLYMERS FROM ONLY ETHYLENIC MONOMERS OR PROCESSES OF POLYMERIZING, POLYMERIZABLE COMPOSITIONS CONTAINING ONLY ETHYLENIC MONOMERS AS REACTANTS OR PROCESSES OF PREPARING {43}
89  DF  .~.~ Polymerizing in the presence of a specified material other than monomer {28}
199.~.~.~ Material contains polypeptide, e.g., protein, gelatin, etc.

DEFINITION

Classification: 526/199

(under subclass 89) Subject matter wherein the specified material contains a protein or a protein-reaction product, e.g., gelatin, silk, etc.

(1) Note. A protein reaction product requires at the minimum the presence of a peptide group, i.e., an amide group between the amino radical of one amino acid and the carboxyl radical of another amino acid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

215, for a polymerization process in the presence of a nitrogen-containing carboxylic acid, salt, ester, or anhydride thereof.