US PATENT SUBCLASS 528 / 338
.~.~.~.~ From at least two dicarboxylic acids or derivatives or mixtures thereof and at least two organic polyamines

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}
338.~.~.~.~ From at least two dicarboxylic acids or derivatives or mixtures thereof and at least two organic polyamines

DEFINITION

Classification: 528/338

(under subclass 335) Subject matter wherein a polymer is derived from at least four reactants, two of which are dicarboxylic acids or carboxylic acid derivatives and two of which are organic polyamines.

(1) Note. Two compounds which are organoamine salts of two different dicarboxylic acids, wherein each of the two amine salts are different and wherein each in its own right is a polyamine, would meet the requirements of this subclass. In addition, a carboxylic acid in admixture with a diamine salt of a different dicarboxylic acid, wherein each of the diamine salts are different and wherein each is a polyamine, would be properly classified herein.