US PATENT SUBCLASS 528 / 223
.~.~.~ 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}
220  DF  .~ FROM KETONE OR KETENE REACTANT {4}
222  DF  .~.~ Polymerizing in the presence of a specified material other than a reactant {3}
223.~.~.~ Material contains a phosphorus or sulfur atom

DEFINITION

Classification: 528/223

(under subclass 222) Subject matter wherein the specified material contains at least one atom of phosphorus or sulfur.