US PATENT SUBCLASS 525 / 187
.~.~.~.~.~ Heterocyclic ring is an 1,2-epoxy ring


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}
185  DF  .~.~.~ With additional solid polymer derived from at least one nonethylenic reactant {4}
186  DF  .~.~.~.~ At least one reactant which forms additional polymer contains a heterocyclic ring {1}
187.~.~.~.~.~ Heterocyclic ring is an 1,2-epoxy ring


DEFINITION

Classification: 525/187

Heterocyclic ring is an 1,2-epoxy ring:

(under subclass 186) Subject matter wherein the heterocyclic reactant is a 1,2-epoxy (oxirane) compound, e.g., epichlorohydrin, etc.