US PATENT SUBCLASS 528 / 83
.~.~.~ Reactant which contains at least two -C-C(=X)-X-C groups has been derived from only a dicarboxylic acid or derivative and only a dihydric alcohol or alcoholate derivative

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}
44  DF  .~ FROM REACTANT HAVING AT LEAST ONE -N=C=X GROUP (WHEREIN X IS A CHALCOGEN ATOM) AS WELL AS PRECURSORS THEREOF, E.G., BLOCKED ISOCYANATE, ETC. {17}
80  DF  .~.~ With reactant compound containing at least two -C-C(=X)-X-C groups and which compound is devoid of C-NH, C=NH or C-N(H)-H groups {3}
83.~.~.~ Reactant which contains at least two -C-C(=X)-X-C groups has been derived from only a dicarboxylic acid or derivative and only a dihydric alcohol or alcoholate derivative

DEFINITION

Classification: 528/83

(under subclass 80) Subject matter wherein the reactant has been derived from only a dicarboxylic acid or derivative and only a glycol or alcoholate derivative.

(1) Note. Included herein are mixtures of dicarboxylic acids and mixtures of glycols.

SEE OR SEARCH THIS CLASS, SUBCLASS:

271, for a definition of the term "dicarboxylic acid or derivative".

SEE OR SEARCH CLASS

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