| Patents for C09B 43 - Preparation of azo dyes from other azo compounds (1,452) |
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| 03/22/1977 | US4013633 Yellow azopyrazoline dye releasing redox compounds for photographic color transfer |
| 03/15/1977 | US4012370 Mono aryl azo-mono-iminoisoindolinone dyestuffs |
| 03/08/1977 | US4011209 Organic solvent-soluble azo dyes |
| 02/22/1977 | US4009158 Mixtures of azo compounds having a 2-nitro-4-phenylsulfamoyldiphenyl amine nucleus |
| 02/15/1977 | US4008216 Benzenesulphonylbenzenesulphonamideazophenyl-or-naphthyl-azolhydroxyloweralkoxyphenyl dyestuffs |
| 02/15/1977 | US4008212 Monoazo dye mixtures derived from 7-amino-4-nitrobenzotriazole and bis-hydroxyalkylamino acylanilides reacted with acid halides and amides |
| 02/01/1977 | US4006128 Azo dyestuffs containing aminopyridone coupling component |
| 01/18/1977 | US4003885 Tetrakisazo compounds having a 1-hydroxy-2-(4'-(2"-sulfoanilino)phenylazo)-3,6-disulfo-7-(optionally 2'-substituted phenylazo)-8-aminonaphthalene middle component |
| 01/04/1977 | US4001207 Tertiary-aliphatic amidazo compounds |
| 12/14/1976 | US3997522 Polyamides |
| 12/14/1976 | US3997521 Bis-(dialkoxycarbonylphenylazo)acetoacetamidoarylenes |
| 11/30/1976 | US3994873 Azo dyestuffs containing sulfonylamino-sulfonyl groups |
| 10/19/1976 | US3987027 Phenyl azophenyl dyestuff |
| 10/19/1976 | US3987026 Transiently water-soluble non-heterocyclic azo and disazo disperse dyestuffs |
| 10/12/1976 | US3985724 1-(4'-Diazoniumphenyl)-pyridinium salts and the process of preparation |
| 10/05/1976 | US3984392 Anisotropic |
| 09/21/1976 | US3981858 Azo dyes |
| 09/14/1976 | US3980636 Polyester fibers |
| 09/07/1976 | US3979376 4-Guanylazo-4-deoxyrifamycin SV derivatives |
| 08/31/1976 | US3978040 Process for the preparation of cyanoazo compounds by reacting halogenoazo compounds with CuCN in an aqueous media in the presence of a nitrogen base |
| 08/31/1976 | US3978009 Substituted (2-methyl-5-isopropyl-cyclopent-1-en-1-yl)s as odor-modifying agents |
| 08/03/1976 | US3972904 Water-soluble dyestuffs readily convertible into insoluble form and process for preparing them |
| 07/27/1976 | US3971771 Dyes for polyesters |
| 07/27/1976 | US3971741 Dispersion pigments |
| 07/27/1976 | US3971740 Dyes for polyester fibers |
| 07/06/1976 | US3968099 Process for the preparation of azo dyestuffs containing cyano groups |
| 06/29/1976 | US3966399 Azo disperse dye mixtures |
| 06/22/1976 | US3965049 One-step synthesis of aromatic organic diselenides |
| 06/15/1976 | US3963418 Yellow disazo acid dye solution |
| 06/08/1976 | US3962209 Process for preparing azo dyestuffs with ortho-azo cyano groups by cyano exchange of metal cyanides and halo dyestuffs |
| 06/01/1976 | US3960831 Disazo dyestuffs containing amino azo benzene sulfonic acid and phenolic or naphtholic couplers |
| 05/25/1976 | US3958933 Disperse dye, acylating agent, chlorinated hydrocarbon solvent |
| 05/11/1976 | US3956268 Substituted phenyl-azo-phenylene-azo-phenyl dyes |
| 05/11/1976 | US3956265 Monoazo hydroxy pyridone dyestuffs containing a methylene piperidino group |
| 05/11/1976 | US3956264 Basic azo dyestuffs having indolyl-methyleneamino substituent in the diazo component |
| 05/04/1976 | US3954398 Polyester fibers dyed with a disazo disperse dyestuff |
| 04/27/1976 | US3953420 Azo pigments derived from 2-hydroxy-3-carboxynaphthalene containing a substituted or unsubstituted phthalimide |
| 04/20/1976 | US3951590 Disazo dyes |
| 04/13/1976 | US3950403 Spiro compounds |
| 04/06/1976 | US3948880 Phenyl-azo-phenyl compounds of low solubility in water |
| 03/23/1976 | US3945992 Disazo dyes for polyamides |
| 03/23/1976 | US3945990 Disazo compounds containing an alkanolamine substituted triazine component |
| 02/10/1976 | US3937723 Cycloaliphatic compounds as odour- and taste-modifying agents |
| 01/20/1976 | US3933664 Organic photoconductive toner materials |
| 01/13/1976 | US3932414 Pigments for polymers, paper, paints, inks, lacquers |
| 01/13/1976 | US3932378 For polyamides, wool, nylon |
| 01/13/1976 | US3932376 Dyeing polyamides |
| 01/06/1976 | US3931145 Keto-amido containing phenylazophenyl dyestuffs |
| 01/06/1976 | US3931143 Polymerization initiators |
| 01/06/1976 | US3931142 Heterocyclic containing disazo compounds |
| 01/06/1976 | US3930794 Process for the dyeing of synthetic fiber materials from organic solvents |
| 01/06/1976 | US3930793 Continuous, disazo dyes |