US PATENT SUBCLASS 562 / 427
.~.~.~.~ 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}
426  DF  .~.~.~ Sulfur {4}
427.~.~.~.~ Polycyclo ring system {1}
428  DF  .~.~.~.~.~> Indenyl or hydrindenyl

DEFINITION

Classification: 562/427

Polycyclo ring system:

(under subclass 426) Compounds wherein the acid contains at least two carbocyclic groups which are joined through two orthopositioned carbon atoms or through a bridge.

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