US PATENT SUBCLASS 534 / 838
.~.~ Exactly one azo group containing or azo attached indirectly to an additional azo group by ionic bonding

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

*  DD  ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8}
573  DF  .~ Azo {51}
838.~.~ Exactly one azo group containing or azo attached indirectly to an additional azo group by ionic bonding {3}
839  DF  .~.~.~> Plural benzene rings bonded directly to the azo group {5}
885  DF  .~.~.~> Benzene ring bonded directly to the azo group
886  DF  .~.~.~> Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.)

DEFINITION

Classification: 534/838

(under subclass 573) Compounds which contain exactly one azo group or more than one azo group if their attachment to each other is by ionic bonding.

(1) Note. Examples of compounds provided for herein are: [figure] [figure]