US PATENT SUBCLASS 525 / 348
.~.~.~.~ Sulfur-containing heterocyclic compound

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}
343  DF  .~.~.~ Chemical treating agent contains a sulfur atom {8}
348.~.~.~.~ Sulfur-containing heterocyclic compound {1}
349  DF  .~.~.~.~.~> Heterocyclic ring contains sulfur and nitrogen atoms

DEFINITION

Classification: 525/348

Sulfur-containing heterocyclic compound:

(under subclass 343) Subject matter wherein the chemical treating is performed in the presence of a heterocyclic compound which contains at least one sulfur atom.

(1) Note. The sulfur atom for purposes of this subclass need not be part of the heterocyclic ring system.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, the Glossary, for a definition of the term "heterocyclic".