US PATENT SUBCLASS 562 / 469
.~.~.~.~ 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}
465  DF  .~.~.~ Oxy {7}
469.~.~.~.~ Rings bonded directly to each other

DEFINITION

Classification: 562/469

Rings bonded directly to each other:

(under subclass 465) Compounds wherein the acid contains two carbocyclic nuclei joined to each other by one covalent bond.

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