US PATENT SUBCLASS 528 / 23
.~.~.~ Material contains a phosphorus or 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}
10  DF  .~ FROM SILICON REACTANT HAVING AT LEAST ONE SILICON-TO-HYDROGEN OR -CARBON BOND {12}
12  DF  .~.~ Polymerizing in the pressence of a specified material other than a reactant {6}
23.~.~.~ Material contains a phosphorus or sulfur atom

DEFINITION

Classification: 528/23

(under subclass 12) Subject matter wherein the specified material contains at least one atom of phosphorus or sulfur.