US PATENT SUBCLASS 568 / 731
.~.~.~.~.~ Additional ring 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}
731.~.~.~.~.~ Additional ring containing {2}
732  DF  .~.~.~.~.~.~> Polycyclo ring system {2}
743  DF  .~.~.~.~.~.~> The additional ring is six-membered {1}

DEFINITION

Classification: 568/731

Additional ring containing:

(under subclass 716) Compounds which contain an additional

carbocyclic ring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

717, for compounds which contain plural phenolic nuclei.