US PATENT SUBCLASS 528 / 388
.~.~.~ Inorganic sulfur reactant contains at least one metal atom or contains an ammonium ion

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}
388.~.~.~ Inorganic sulfur reactant contains at least one metal atom or contains an ammonium ion

DEFINITION

Classification: 528/388

(under subclass 381) Subject matter wherein the inorganic sulfur reactant contains at least one metal atom or at least one ammonium ion.