US PATENT SUBCLASS 528 / 378
.~.~.~ Polymerizing in the presence of a specified material other than a 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}
377  DF  .~.~ From heterocyclic compound containing a sulfur atom as a ring member {2}
378.~.~.~ Polymerizing in the presence of a specified material other than a reactant {1}
379  DF  .~.~.~.~> Material contains a Group IA (Li, Na, K, Rb, Cs, Fr) or Group IIA metal atom (Be, Mg, Ca, Sr, Ba, Ra)

DEFINITION

Classification: 528/378

(under subclass 377) Subject matter wherein at least one reactant containing a heterocyclic ring having at least one sulfur atom as a ring atom is polymerized in the presence of a specified material.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, see the Glossary for a definition of the term "specified material".