US PATENT SUBCLASS 528 / 380
.~.~.~ Heterocyclic reactant contains a ring composed solely of carbon atoms and a single sulfur atom

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}
377  DF  .~.~ From heterocyclic compound containing a sulfur atom as a ring member {2}
380.~.~.~ Heterocyclic reactant contains a ring composed solely of carbon atoms and a single sulfur atom

DEFINITION

Classification: 528/380

(under subclass 377) Subject matter wherein a sulfur heterocyclic reactant contains at least one heterocyclic ring composed of a single sulfur atom and two or more carbon atoms and there are no other atoms in the heterocyclic ring.