US PATENT SUBCLASS 524 / 549
.~.~.~.~.~ Five-membered oxygen ring, e.g., coumarone-indene, etc.

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
*  DD  .~ 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 (Class 523, subclass 1) {17}
1  DF  .~.~ Adding a NRM to a preformed solid polymer or preformed specified intermediate condensation product, composition thereof; or process of treating or composition thereof {31}
543  DF  .~.~.~ Polymer derived from ethylenic reactants only {11}
548  DF  .~.~.~.~ From heterocyclic monomer {1}
549.~.~.~.~.~ Five-membered oxygen ring, e.g., coumarone-indene, etc.

DEFINITION

Classification: 524/549

Five-membered oxygen ring, e.g., coumarone-indene, etc.:

(under subclass 548) Subject matter wherein the heterocyclic monomer contains at least one five-membered heterocyclic ring having at least one oxygen atom in the ring.