US PATENT SUBCLASS 564 / 431
.~.~.~ Two carbocyclic rings, at least one of which is benzene, bonded directly to the same nitrogen

Current as of: June, 1999
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564 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ AMINO NITROGEN CONTAINING (E.G., UREA, SULFONAMIDES, NITROSAMINES, OXYAMINES, ETC., AND SALTS THEREOF) {37}
305  DF  .~.~ Benzene ring containing {24}
431.~.~.~ Two carbocyclic rings, at least one of which is benzene, bonded directly to the same nitrogen {2}
432  DF  .~.~.~.~> Condensation products and processes of acyclic ketone and compound which contains two benzene rings bonded directly to the same nitrogen
433  DF  .~.~.~.~> Two benzene rings bonded directly to the same nitrogen {2}

DEFINITION

Classification: 564/431

(under subclass 305) Compounds wherein two rings at least one of which is benzene are bonded directly to the same nitrogen.

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