US PATENT SUBCLASS 528 / 118
.~.~.~.~.~ Six-membered heterocyclic ring contains at least one nitrogen atom as a ring member

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}
106  DF  .~.~.~ With at least one nonepoxy or nonphenolic reactant {9}
116  DF  .~.~.~.~ Non-1,2-epoxy or nonphenolic reactant contains a heterocyclic ring {2}
118.~.~.~.~.~ Six-membered heterocyclic ring contains at least one nitrogen atom as a ring member

DEFINITION

Classification: 528/118

(under subclass 116) Subject matter wherein the non-1, 2-epoxy or nonphenolic reactant contains a six-membered heterocyclic ring having at least one nitrogen atom as a ring member.