US PATENT SUBCLASS 526 / 204
.~.~.~ Material contains heterocyclic compound

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {8}
72  DF  .~ POLYMERS FROM ONLY ETHYLENIC MONOMERS OR PROCESSES OF POLYMERIZING, POLYMERIZABLE COMPOSITIONS CONTAINING ONLY ETHYLENIC MONOMERS AS REACTANTS OR PROCESSES OF PREPARING {43}
89  DF  .~.~ Polymerizing in the presence of a specified material other than monomer {28}
204.~.~.~ Material contains heterocyclic compound {1}
205  DF  .~.~.~.~> Sulfur and nitrogen together in a single ring

DEFINITION

Classification: 526/204

(under subclass 89) Subject matter wherein the specified material contains a compound which has one or more carbon atoms covalently bonded in a closed ring with at least one atom of oxygen, sulfur, or nitrogen and which has no other atoms in the ring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

194, for a compound having selenium or tellurium atoms in a heterocyclic ring.