US PATENT SUBCLASS 528 / 98
.~.~.~ Phenolic reactant contains at least three distinct aromatic or carbocyclic rings or mixtures thereof

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}
87  DF  .~.~ From 1,2-epoxy-containing phenolic reactant or with 1,2-epoxy-containing reactant {12}
98.~.~.~ Phenolic reactant contains at least three distinct aromatic or carbocyclic rings or mixtures thereof

DEFINITION

Classification: 528/98

(under subclass 87) Subject matter wherein the phenol, phenol ether, or inorganic phenolate contains at least three rings and wherein each of said rings is composed solely of carbon atoms.

(1) Note. For purposes of this subclass a ring containing only carbon atoms wherein a 1, 2-epoxy group is fused directly thereto is considered as being a single ring, e.g., [figure] [caption], etc.