US PATENT SUBCLASS 525 / 181
.~.~.~.~ With ethylenically unsaturated reactant; or reactant contains a heterocyclic ring other than solely as a lactam or 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}
181.~.~.~.~ With ethylenically unsaturated reactant; or reactant contains a heterocyclic ring other than solely as a lactam or cyclic anhydride of a polycarboxylic acid

DEFINITION

Classification: 525/181

With ethylenically unsaturated reactant; or reactant contains a heterocyclic ring other than solely as a lactam or cyclic anhydride of a polycarboxylic acid:

(under subclass 178) Subject matter wherein a reactant contains an ethylenic group; or reactant contains a heterocyclic ring other than solely as an anhydride or lactam, e.g., maleic acid.

(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 ring when in combination with a noncyclic anhydride ring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

178, for the situation wherein the ethylenic reactant may be introduced subsequent to the solid polymer.