US PATENT SUBCLASS 525 / 353
.~.~.~.~ Sulfur compound contains sulfur atom bonded to at least two oxygen atoms, e.g., sulfonate, etc.

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}
353.~.~.~.~ Sulfur compound contains sulfur atom bonded to at least two oxygen atoms, e.g., sulfonate, etc.

DEFINITION

Classification: 525/353

Sulfur compound contains sulfur atom bonded to at least two oxygen atoms, e.g., sulfonate, etc.:

(under subclass 343) Subject matter wherein the chemical treating is performed in the presence of a compound which has at least one sulfur atom bonded to at least two oxygen atoms, e.g., sulfonate, sulfate, etc.