US PATENT SUBCLASS 568 / 718
.~.~.~.~.~.~ Three or more rings containing

Current as of: June, 1999
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568 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {4}
300  DF  .~ OXYGEN CONTAINING (E.G., PERCHLORYLBENZENE, ETC.) {11}
700  DF  .~.~ Hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal) {10}
715  DF  .~.~.~ Benzene ring containing {8}
716  DF  .~.~.~.~ Phenols (H of -OH may be replaced by a Group IA or IIA light metal) {14}
717  DF  .~.~.~.~.~ Polyphenols {4}
718.~.~.~.~.~.~ Three or more rings containing {3}
719  DF  .~.~.~.~.~.~.~> Polycyclo ring system
720  DF  .~.~.~.~.~.~.~> Three or more phenols containing
721  DF  .~.~.~.~.~.~.~> Alicyclic ring containing

DEFINITION

Classification: 568/718

Three or more rings containing:

(under subclass 717) Compounds which contain at least three rings.

(1) Note. Some examples of compounds provided for herein are: [figure] [figure]

(2) Note. The third ring may be another phenol but is not required to be.