US PATENT SUBCLASS 528 / 341
.~.~.~.~ Heterocyclic-containing reactant other than cyclic acid anhydride as sole hetero ring

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}
341.~.~.~.~ Heterocyclic-containing reactant other than cyclic acid anhydride as sole hetero ring

DEFINITION

Classification: 528/341

(under subclass 335) Subject matter wherein at least one reactant contains a heterocyclic ring with the proviso that the sole heterocyclic group is not a dicarboxylic acid anhydride.

SEE OR SEARCH THIS CLASS, SUBCLASS:

310, for an imide or lactam-containing reactant.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, see the Glossary for a definition of the term "heterocyclic'.