US PATENT SUBCLASS 525 / 375
.~.~.~.~ Contains nitrogen atom in a heterocyclic 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}
374  DF  .~.~.~ Chemical treating agent is a nitrogen-containing compound {5}
375.~.~.~.~ Contains nitrogen atom in a heterocyclic ring

DEFINITION

Classification: 525/375

Contains nitrogen atom in a heterocyclic ring:

(under subclass 374) Subject matter wherein the chemical treating agent contains a compound having at least one atom of nitrogen and carbon in the same ring and wherein the other atoms of the ring may be oxygen, selenium, or tellurium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

343+, for treating in the presence of a heterocyclic sulfur-containing compound.