US PATENT SUBCLASS 528 / 211
.~.~ With nitrogen-containing 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}
86  DF  .~ FROM PHENOL, PHENOL ETHER, OR INORGANIC PHENOLATE {15}
211.~.~ With nitrogen-containing reactant

DEFINITION

Classification: 528/211

(under subclass 86) Subject matter wherein a polymer is derived from a phenol ether or inorganic phenolate and a nitrogen-containing reactant.