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Class Information
Number: 534/807
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Azo > Exactly four azo groups attached indirectly to each other by nonionic bonding > Plural nitrogens bonded directly to the same -c(=x)- group, wherein x is chalcogen (e.g., urea, thiourea, etc.)
Description: Compounds wherein plural nitrogens are bonded directly to the same N-- Ngroup, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium), e.g., N-- N.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6120561 |
Process for the preparation of low-salt, liquid dyestuff preparations |
Sep. 19, 2000 |
| 6013775 |
Polyazo dyes containing a plurality of hydroxy sulfonyl groups |
Jan. 11, 2000 |
| 5239063 |
Fibre reactive azo dyestuffs |
Aug. 24, 1993 |
| 5204454 |
Prepolymeric polyols containing mesogenic units |
Apr. 20, 1993 |
| 4978747 |
Colorants obtained by reacting a NH.sub.2 -containing dyestuff with a diisocyanate followed by reaction of this adduct with a diamine |
Dec. 18, 1990 |
| 4648907 |
High color strength diarylide yellow pigment compositions |
Mar. 10, 1987 |
| 4617380 |
Process for the preparation of concentrated stable liquid dye solutions of CI Direct Yellow 11 utilizing an extended surface silica filter aid during a desalting procedure |
Oct. 14, 1986 |
| 4465627 |
Sulfo group-free disazo, trisazo and tetrakisazo compounds containing at lease one basic or cationic group |
Aug. 14, 1984 |
| 4149851 |
Concentrated aqueous dye compositions containing a low molecular weight amide |
Apr. 17, 1979 |
| 4023924 |
Concentrated aqueous dye compositions containing a low molecular weight amide and their use for dyeing paper |
May. 17, 1977 |
| 4013634 |
Tetraazo direct urea-derived dye having a core of H-acid, K-acid or S-acid |
Mar. 22, 1977 |
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