US PATENT SUBCLASS 525 / 346
.~.~.~.~ With sulfur-free organic 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}
346.~.~.~.~ With sulfur-free organic compound {1}
347  DF  .~.~.~.~.~> Sulfur-free organic compound contains heterocyclic nitrogen

DEFINITION

Classification: 525/346

With sulfur-free organic compound:

(under subclass 343) Subject matter wherein the chemical treating is performed in the presence of at least two materials, one of which is a sulfur-containing material, and one of which is an organic compound which is devoid of sulfur atoms.