US PATENT SUBCLASS 528 / 389
.~.~.~ Elemental sulfur is reactant

Current as of: June, 1999
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528 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
373  DF  .~ FROM SULFUR-CONTAINING REACTANT {5}
381  DF  .~.~ From inorganic sulfur-containing reactant {4}
389.~.~.~ Elemental sulfur is reactant

DEFINITION

Classification: 528/389

(under subclass 381) Subject matter wherein at least one reactant is elemental sulfur.