US PATENT SUBCLASS 528 / 261
.~.~.~ At least one reactant is a nonaldehyde or nonaldehyde derivative, non- >N C(=X)-N< -containing reactant

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}
259  DF  .~.~ With >N-C(=X)-N< -containing reactant wherein X is a chalcogen atom {3}
261.~.~.~ At least one reactant is a nonaldehyde or nonaldehyde derivative, non- >N C(=X)-N< -containing reactant {1}
262  DF  .~.~.~.~> Nonaldehyde reactant, non->N-C(=X)-N< reactant contains a nitrogen atom {1}

DEFINITION

Classification: 528/261

(under subclass 259) Subject matter wherein at least one reactant is a nonaldehyde or derivative or non group- (X is O, S, Se, or Te) containing material.