US PATENT SUBCLASS 562 / 461
.~.~.~.~ Polycyclo 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}
405  DF  .~.~ Aromatic {13}
459  DF  .~.~.~ Aldehyde or ketone {3}
461.~.~.~.~ Polycyclo ring system {1}
462  DF  .~.~.~.~.~> Bicyclo ring system

DEFINITION

Classification: 562/461

Polycyclo ring system:

(under subclass 459) Compounds wherein the acid contains two or more carbocyclic nuclei joined to each other through two orthopositioned carbons or through a bridge.

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