US PATENT SUBCLASS 568 / 707
.~.~.~.~.~.~ Plural 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}
704  DF  .~.~.~ Nitrogen containing {3}
705  DF  .~.~.~.~ Benzene ring containing {1}
706  DF  .~.~.~.~.~ Phenols (H of -OH may be replaced by a Group IA or IIA light metal) {4}
707.~.~.~.~.~.~ Plural rings containing

DEFINITION

Classification: 568/707

Plural rings containing:

(under subclass 706) Compounds which contain at least two rings.

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