US PATENT SUBCLASS 562 / 499
.~.~.~ Tricyclo ring system

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {41}
400  DF  .~ Carboxylic acids and salts thereof {14}
498  DF  .~.~ Plural alicyclic rings {2}
499.~.~.~ Tricyclo ring system

DEFINITION

Classification: 562/499

Tricyclo ring system:

(under subclass 498) Compounds wherein the acid contains three alicyclic nuclei joined to each other through two orthopositioned carbons or by a bridge.

(1) Note. See subclasses 403+ for carboxylic acids where the tricyclo ring system is hydrophenanthrene.

(2) Note. This subclass contains, for example: [figure] [figure]