US PATENT SUBCLASS 528 / 43
.~.~ Silicon reactant contains an aryl group


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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}
43.~.~ Silicon reactant contains an aryl group


DEFINITION

Classification: 528/43

(under subclass 10) Subject matter wherein the containing reactant possesses at least one aromatic group therein.