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Class Information
Number: 534/831
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Azo > Exactly two azo groups attached indirectly to each other by nonionic bonding > Plural benzene rings bonded directly to each azo group
Description: Compounds in which plural benzene rings are bonded directly to each azo group.

Sub-classes under this class:

Class Number Class Name Patents
534/832 At least one of the benzene rings is part of a bicyclo ring system 71

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
3963418 Yellow disazo acid dye solution Jun. 15, 1976
3960831 Disazo dyestuffs containing amino azo benzene sulfonic acid and phenolic or naphtholic couplers Jun. 1, 1976
3958930 Deep-dyed nylon fiber and dyed styling yarn May. 25, 1976
3944540 Precipitation of organic dyes and dye intermediates in the presence of finely divided polytetrafluoroethylene Mar. 16, 1976
3932378 Sulfonated disazo dyestuffs containing an ether group Jan. 13, 1976
3932376 Sulfo phenyl-azo-sulro phenyl-azo-alkoxy-diphenyl compounds Jan. 13, 1976
3930793 Process for the dyeing of synthetic fiber materials from organic solvents Jan. 6, 1976

1 2 3

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