US PATENT SUBCLASS 562 / 457
.~.~.~.~ Plural rings with nitrogen bonded directly to at least one ring

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}
433  DF  .~.~.~ Nitrogen bonded directly to carbon of organic radical (e.g., amino acids, etc.) {9}
457.~.~.~.~ Plural rings with nitrogen bonded directly to at least one ring

DEFINITION

Classification: 562/457

Plural rings with nitrogen bonded directly to at least one ring:

(under subclass 433) Compounds wherein the acid contains more than one carbocyclic group and nitrogen is bonded directly to at least one of them.

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