US PATENT SUBCLASS 528 / 97
.~.~.~ Phenolic reactant contains a fused-or bridged-ring other than as a 1,2 epoxy group fused to carbocyclic or aromatic ring

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}
97.~.~.~ Phenolic reactant contains a fused-or bridged-ring other than as a 1,2 epoxy group fused to carbocyclic or aromatic ring

DEFINITION

Classification: 528/97

(under subclass 87) Subject matter wherein the phenol, phenol ether, or inorganic phenolate reactant contains a fused or bridged structure, which fused structure is other than a 1, 2-epoxy ring which is fused to a ring system containing only carbon atoms as ring members.

(1) Note. Fused or bridged ring for purposes of this subclass requires that a ring system be attached at two different atoms of its nuclear skeleton to an atom or chain of atoms which, when taken together with the nuclear atoms, forms an additional ring system.