US PATENT SUBCLASS 528 / 343
.~.~.~.~ Carboxylic acid containing (C=O)-(C=O) or is a derivative thereof, e.g., oxalic acid, etc.

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
271  DF  .~ FROM CARBOXYLIC ACID OR DERIVATIVE THEREOF {10}
332  DF  .~.~ With organic amine, or from organic amine salt of a carboxylic acid {2}
335  DF  .~.~.~ From dicarboxylic acid or derivative thereof and an organic amine, or from an organic amine salt of a dicarboxylic acid {13}
343.~.~.~.~ Carboxylic acid containing (C=O)-(C=O) or is a derivative thereof, e.g., oxalic acid, etc.

DEFINITION

Classification: 528/343

(under subclass 335) Subject matter wherein at least one reactant is derived from a (n is an integer) containing dicarboxylic acid or is a carboxylic acid derivative thereof.