| Patents for C09B 29 - Monoazo dyes prepared by diazotising and coupling (4,940) |
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| 06/16/1981 | US4273707 Monoazo and disazo dyes containing at least one sulfo group and at least two basic or cationic groups |
| 06/10/1981 | EP0030028A1 Process for printing synthetic, hydrophobic fibrous material according to the transfer printing principle |
| 06/03/1981 | EP0029558A1 Azo compounds, process for their preparation and their use |
| 06/02/1981 | US4271072 Azo dyestuffs containing -SO2 CH2 CH2 OSO3 H and -N(CH2 CH2 OSO3 H)2 groups |
| 06/02/1981 | US4271071 Monoazo dyes for synthetic fibers |
| 05/26/1981 | US4269928 Process for the production of photographic images by dye diffusion transfer and photographic material suitable in this process |
| 05/26/1981 | US4269924 Reduction of interimage effects and improved color separation effected by special positioning of the emulsion layers to act as diffusion barriers |
| 05/26/1981 | US4269770 Process for the preparation of cyanoazo dyestuffs |
| 05/26/1981 | US4269768 Process for the preparation of chlorozincate salts of thiazolium azo dyestuffs |
| 05/26/1981 | US4269767 Diazotization of aromatic amines |
| 05/26/1981 | CA1101670A1 Image producing system |
| 05/20/1981 | EP0029009A1 Preparation of pigments |
| 05/19/1981 | US4268624 Photographic light-sensitive sheet for the color diffusion transfer process |
| 05/19/1981 | US4268606 Azo dye compounds and photographic materials |
| 05/19/1981 | US4268438 Cationic 1,3,4-thiadiazole dyestuffs |
| 05/19/1981 | US4268436 Oxidative diazotization with nitrosylsulfuric acid, alkaline metal nitrites, or alkyl nitrites |
| 05/19/1981 | CA1101154A1 Disperse azo dyestuffs |
| 05/12/1981 | US4267104 Dyes from selected substituted aniline diazo components and aniline couplers containing sulfate ester groups |
| 05/12/1981 | US4266939 Composition of 4-amino-4'-nitrostilbene-2,2'-disulphonic acid diazo compounds and coloring process |
| 05/06/1981 | EP0027887A2 Azodyestuffs, their preparation and use in dyeing synthetic fibres |
| 05/05/1981 | US4265812 Azo dyes derived from 3-amino-2,1-benzisothiazoles and aromatic amine couplers containing sulfo groups, or salts thereof |
| 05/05/1981 | CA1100491A1 Azo pigments |
| 04/28/1981 | US4264495 2-Thienyl azo dyestuff compounds |
| 04/21/1981 | US4263205 For coloring polymers, lacquers |
| 04/21/1981 | US4263204 Monoazoic hydrosoluble cationic dyes |
| 04/14/1981 | CA1099260A1 Process for manufacturing cyano containing, azoic dyestuffs |
| 04/08/1981 | EP0026596A1 Disperse monoazo dyestuffs, their preparation and use for dyeing synthetic textile materials |
| 04/08/1981 | EP0026414A2 Water soluble monoazo compounds, their preparation and their use as dyestuffs in dyeing and printing textile materials, as well as the amines per se |
| 04/07/1981 | US4260540 Spin dyeing polyacrylonitrile |
| 04/07/1981 | CA1098902A1 Disperse azo dyestuffs, process for their preparation and their use for the dyeing or printing of synthetic fiber materials |
| 04/01/1981 | EP0025903A1 Monoazo dyestuffs, their preparation and use in dyeing and printing of fibre materials by the usual methods and by the transfer-printing principle, as well as transfer-printing inks and substrates suited for transfer-printing |
| 03/31/1981 | US4259237 Azo dyestuffs containing phenolic coupling group |
| 03/31/1981 | US4259236 Colorfast red shades on polyesters |
| 03/31/1981 | CA1098516A1 Process for the manufacture of phthalocyanine azo dyestuffs |
| 03/25/1981 | EP0025473A1 Pigment dyestuffs of the monoazo-2,3-oxynaphthoic acid arylide series and their use in colouring printing inks, lacquers or synthetic materials |
| 03/24/1981 | US4258120 Substituted sulfonamido compounds, photosensitive elements, film units, and processes for retaining a photographic image with same |
| 03/24/1981 | US4257943 Disperse azo dyestuffs and process for preparation and their use |
| 03/24/1981 | US4257942 New water-insoluble azo dyes |
| 03/24/1981 | CA1098120A1 Azo compounds and preparation thereof |
| 03/17/1981 | US4256831 Light-sensitive photographic element comprising a magenta image dye-providing compound |
| 03/17/1981 | US4256634 Monoazo dyes; dyeing and printing of wool, silk, perlon", and leather; colorfastness |
| 03/17/1981 | CA1097622A1 Water-soluble dyestuffs, process for preparing them and their use for dyeing and printing cellulose and polyamide fiber materials |
| 03/11/1981 | EP0024676A2 Process for finishing fibrous materials |
| 03/10/1981 | US4255509 Photographic light-sensitive sheet for the color diffusion transfer process |
| 03/10/1981 | US4255326 Nitrogen and/or sulfur containing heterocyclic azo dyes with aniline, tetrahydroquinoline and benzomorpholine couplers having sulfate group |
| 03/05/1981 | WO1981000570A1 Hydrogel implant article and method |
| 03/03/1981 | US4254027 Disperse monoazo dyestuffs for coloring synthetic textile materials |
| 03/03/1981 | US4254026 Water-soluble monoazo dyestuffs |
| 03/03/1981 | CA1096858A1 Rubine pigments |
| 03/03/1981 | CA1096557A1 Polyester dyed with o-nitrophenylazo-2-naphthol dyes |
| 02/25/1981 | EP0024261A1 Azo pigments and process for their preparation, and their use |
| 02/24/1981 | US4252716 Benzthiazolyl-azo-indole basic dyestuffs |
| 02/24/1981 | US4252530 Using a base as discharge agent in a discharge resist paste and heating |
| 02/17/1981 | US4251441 Pigments of mixtures of methoxynitrobenzene-azo-methoxy-acetanilides |
| 02/17/1981 | CA1095923A1 2-hydroxy-3-naphthoic acid amides |
| 02/17/1981 | CA1095898A1 Preparation of azo dyestuffs |
| 02/17/1981 | CA1095660A1 Process for dyeing and printing nickel-containing polyolefins |
| 02/11/1981 | EP0023770A1 Cationic pyridone azo dyestuffs, certain novel coupling components from which they are derived and processes for the manufacture of the dyestuffs and the coupling components |
| 02/11/1981 | EP0023718A1 Process for the transfer printing of synthetic, hydrophobic fibrous material |
| 02/11/1981 | EP0023617A1 Anthraquinone-azo compounds, process for their preparation and their use as pigments |
| 02/11/1981 | EP0023601A1 Process for dyeing and printing textile material containing cellulose |
| 02/10/1981 | US4250246 Magenta dye-releasing redox compound; colorfastness |
| 02/10/1981 | US4250238 Photographic products and processes employing novel dye developer compounds |
| 02/10/1981 | US4250091 Water-soluble disazo dyestuff derived from 4,4-diaminobenzanilide |
| 02/10/1981 | US4250090 2-Amino-5-arylazoarylazothiazole compounds |
| 02/10/1981 | US4250089 Process for diazotizing aromatic amines |
| 02/10/1981 | US4249902 Dyestuff formulations |
| 02/10/1981 | US4249275 Aryloxy-sulfonyl substituted monoazo dye, swelling |
| 02/04/1981 | EP0023386A1 Disperse monoazo dyes, their preparation and their application to synthetic textile materials |
| 02/04/1981 | EP0023315A1 Processes for dyeing and printing textile material containing cellulose |
| 02/04/1981 | EP0023260A1 5-Amino-benzimidazol-2-one hydrate, process for its preparation and its application as precursor for dyestuffs |
| 02/03/1981 | US4248956 Photographic products and processes employing heterocyclic azo dye developer compounds |
| 02/03/1981 | US4248775 Preparation of solutions of azo methine basic dyestuffs |
| 02/03/1981 | US4248774 P-Sulphophenoxy-phenylazo indoles |
| 02/03/1981 | US4248773 Acetoacetamide diazo dyestuffs |
| 02/03/1981 | US4248772 Positively or negatively charged azo compounds containing a ballasting group |
| 01/28/1981 | EP0022981A1 Dyestuff mixtures of the azo-aminopyridine series |
| 01/27/1981 | US4247629 For diffusion transfer |
| 01/27/1981 | US4247458 Coupling diazonium salt with disperse dye coupler with displaceable group other than hydrogen |
| 01/27/1981 | US4247457 Cationic dyes containing an aryloxy group linked through a bridging radical to a quaternized nitrogen atom |
| 01/27/1981 | US4247456 Water-insoluble monoazo pyridone dye |
| 01/21/1981 | EP0022512A1 Azo compounds containing phosphorus, their preparation, and their use as pesticides, as light sensitive materials and as starting materials for the synthesis of pyrazolones |
| 01/20/1981 | US4246414 2-Alkoxyalkoxy-5-nitrobenzenesulfonic acid and salt thereof |
| 01/20/1981 | CA1094055A1 Water insoluble azo dyes |
| 01/07/1981 | EP0022076A1 Iminoisoindolinone dyestuffs, methods for their preparation and their use |
| 01/07/1981 | EP0021332A1 Azo compounds process for their preparation, and use |
| 01/06/1981 | US4243809 5-sulfonyl-6-hydroxypyridones or the 3-carbamoyl derivatives; sulfonylation with an alkyl sulfonyl halide |
| 01/06/1981 | US4243606 Azo dye coupler intermediates |
| 01/06/1981 | US4243584 Monoazo dyestuffs containing diazo component substituted by disulfimide and trifluoromethyl groups |
| 01/06/1981 | US4243583 Process for the preparation of azo dyes |
| 12/30/1980 | US4242435 Photographic dye diffusion transfer process |
| 12/23/1980 | US4240959 For acrylonitrile polymer or copolymer fibers; fastness |
| 12/16/1980 | US4239886 Salts of N-acylaminohydroxynaphthalenesulphonic acids |
| 12/16/1980 | CA1091655A1 Dicyano azo dyes having ether substituted aniline couplers |
| 12/16/1980 | CA1091654A1 Azo dyestuffs |
| 12/10/1980 | EP0020161A2 Azodyestuffs derived from 5-membered heterocyclic amines and aromatic couplers containing sulpho-groups, or salts thereof and their use in dyeing polyamide fibres |
| 12/10/1980 | EP0019846A2 Tanning agents of the azo series, their preparation and their use in the simultaneous tanning and dyeing of leather, and preparations containing them |
| 12/10/1980 | EP0019831A1 Colour-stable crystallographic modification of a monoazo dyestuff, its preparation and its use in dyeing fibrous materials |
| 12/09/1980 | CA1091224A1 Monoazo pigments and processes for producing them |
| 12/02/1980 | US4237048 Monoazo dyestuff containing di-cyano substituents ortho to the azo group |