US PATENT SUBCLASS 562 / 492
.~.~.~ Rings bonded directly to each other

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}
492.~.~.~ Rings bonded directly to each other

DEFINITION

Classification: 562/492

Rings bonded directly to each other:

(under subclass 405) Compounds wherein the acid contains two carbocyclic nuclei joined to each other by one covalent bond and only one carboxyl group.

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