US PATENT SUBCLASS 528 / 249
.~.~.~ Nonaldehyde or nonaldehyde derivative heterocyclic compound contains an oxygen atom as a ring member of the heterocyclic compound

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}
230  DF  .~ FROM ALDEHYDE OR DERIVATIVE THEREOF AS REACTANT {12}
248  DF  .~.~ With heterocyclic reactant which is not an aldehyde or derivative {5}
249.~.~.~ Nonaldehyde or nonaldehyde derivative heterocyclic compound contains an oxygen atom as a ring member of the heterocyclic compound {1}
250  DF  .~.~.~.~> Heterocyclic compound contains a 1,2-epoxy ring

DEFINITION

Classification: 528/249

(under subclass 248) Subject matter wherein the heterocyclic reactant which is not an aldehyde or derivative of an aldehyde contains at least one oxygen atom as a ring member of a heterocyclic ring.