US PATENT SUBCLASS 528 / 422
.~ NITROGEN-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}
422.~ NITROGEN-CONTAINING REACTANT {1}
423  DF  .~.~> Reactant contains nitrogen as a ring member of a heterocyclic ring {1}


DEFINITION

Classification: 528/422

(under subclass 1) Subject matter under Class 520, ... involving polymers derived from a nitrogen- containing reactant or process of polymerizing; polymerizable compositions containing as a reactant a nitrogen-containing material or processes of preparing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

480+, for processes of preparing a polymer not involving a chemical modification of the polymer, by the addition of a material thereto, and for chemically modifying material other than the polymer. Subclasses 480+ also provide for processes of admixing with a broadly claimed nonreactant material.

SEE OR SEARCH CLASS

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