US PATENT SUBCLASS 568 / 733
.~.~.~.~.~.~.~ Tricyclo ring system

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  DF  .~.~.~.~.~ Additional ring containing {2}
732  DF  .~.~.~.~.~.~ Polycyclo ring system {2}
733.~.~.~.~.~.~.~ Tricyclo ring system

DEFINITION

Classification: 568/733

Tricyclo ring system:

(under subclass 732) Compounds wherein the polycyclo ring system consists of three rings.

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