US PATENT SUBCLASS 562 / 61
.~.~.~.~ Plural benzene rings bonded directly to the same nitrogen


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}
30  DF  .~ Sulfonic acids or salts thereof (i.e., compounds containing the sulfonate group, -S(=O)(=O)-O- wherein the single bonded oxygen is bonded directly to hydrogen, or to a group IA or IIA light metal or to substituted or unsubstituted ammonium) {15}
45  DF  .~.~ Benzene ring bonded directly to the sulfonate sulfur (e.g., purification and neutralization of benzene sulfonic acids, etc.) {11}
58  DF  .~.~.~ Nitrogen attached indirectly to the sulfonate group by nonionic bonding {7}
61.~.~.~.~ Plural benzene rings bonded directly to the same nitrogen {3}
62  DF  .~.~.~.~.~> Plural nitrogens each bonded to two benzene rings (e.g., phenylaminophenylaminophenyl compounds, etc.)
63  DF  .~.~.~.~.~> At least one of the benene rings is part of a naphthalene ring system
64  DF  .~.~.~.~.~> Oxygen bonded directly to a benzene ring


DEFINITION

Classification: 562/61

(under subclass 58) Compounds wherein a nitrogen atom is bonded to more than one benzene ring.

(1) Note. An example of a compound provided for herein is: [figure]