US PATENT SUBCLASS 523 / 429
.~.~.~.~.~ Organic nitrogen compound contains N-heterocycle

Current as of: June, 1999
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523 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF {71}
400  DF  .~.~ Process of forming a composition containing a nonreactive material (NRM) and a polymer containing more than one 1,2-epoxy group, or a preformed polymer derived from or admixed with a reactant containing more than one 1,2-epoxy group, or with a polymer derived from an epihalohydrin and a polyhydric phenol or polyol; or composition or product thereof {24}
427  DF  .~.~.~ Composition wherein two or more polymers or a polymer and a reactant all contain more than one 1,2-epoxy group, or product thereof {3}
428  DF  .~.~.~.~ With reactant nitrogen or sulfur compound {1}
429.~.~.~.~.~ Organic nitrogen compound contains N-heterocycle

DEFINITION

Classification: 523/429

Organic nitrogen compound contains N-heterocycle:

(under subclass 428) Subject matter wherein the organic nitrogen compound contains a nitrogen heterocycle, e.g., melamine-formaldehyde condensation product, etc.

(1) Note. See the Class 520 Glossary for a definition of the term "heterocyclic".