US PATENT SUBCLASS 525 / 182
.~.~.~.~ Solid polymer derived from ethylenically unsaturated reactant only is one derived from a reactant containing a heterocyclic ring and is other than solely a cyclic anhydride of a polycarboxylic acid

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
55  DF  .~.~ At least one solid polymer derived from ethylenic reactants only {25}
178  DF  .~.~.~ With a polycarboxylic acid or derivative and a polyamine or the corresponding salt thereof; or with a lactam; or with an aminocarboxylic acid; or with the corresponding polymers; and wherein the monomer or polymer was derived from at least one saturated reactant {6}
182.~.~.~.~ Solid polymer derived from ethylenically unsaturated reactant only is one derived from a reactant containing a heterocyclic ring and is other than solely a cyclic anhydride of a polycarboxylic acid

DEFINITION

Classification: 525/182

Solid polymer derived from ethylenically unsaturated reactant only is one derived from a reactant containing a heterocyclic

ring and is other than solely a cyclic anhydride of a polycarboxylic acid:

(under subclass 178) Subject matter wherein the solid polymer is derived from or has been reacted with an ethylenic reactant which is a heterocyclic compound other than solely as a carboxylic acid anhydride, e.g., N-vinylpyrrolidone, glycidyl methacrylate and N-vinylcarbazole, etc.

(1) Note. Excluded from this subclass are ethylenic monomers that contain a single heterocyclic ring and which ring is a cyclic anhydride. This subclass does not exclude a cyclic anhydride when in combination with a noncyclic anhydride ring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

183, for a solid polymer derived from maleic anhydride.