| Patents for C09B 44 - Azo dyes containing onium groups (862) |
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| 01/13/1998 | US5708151 Cationic imidazole azo dyes |
| 10/07/1997 | US5674299 Using mono- or disazo, cationic or basic dye |
| 09/17/1997 | CN1159463A Pyridone-methide azo dyestuffs |
| 06/03/1997 | US5635607 Blue or violet color dye for dyeing paper, textiles |
| 04/09/1997 | EP0767220A1 Pyridonmethidazo dyes |
| 02/05/1997 | EP0757083A2 Cationic thiazolazo and benzothiazolazo dyestuffs |
| 01/23/1997 | DE19629238A1 Fast basic 1-amino-alk(en)yl-2-hydroxy-6-pyridone dis:azo dyes bleached by redn. |
| 01/08/1997 | EP0752494A1 Process for reducing the toxicity of residual dyeing-baths and new cationic dyes |
| 01/02/1997 | EP0751188A1 Hydrophobic cationic dyes and thermal transfer ink ribbons using the same |
| 12/03/1996 | US5580964 Cationic thiadiazole dyestuffs |
| 11/05/1996 | US5571898 Basic dyes based on amides of j-acid (1-hydroxy-6-aminonaphthalene-3-sulfonic acid) and amides of j-acid |
| 08/13/1996 | US5545724 Dyeing or printing paper or paper products yellow; colorfastness |
| 06/19/1996 | EP0717082A1 Process for the preparation of cationic 1,3,4-thiadiazole dyes |
| 06/19/1996 | EP0717081A1 Cationic 1,3,4-thiadiazole dyes |
| 06/05/1996 | EP0714954A2 Cationic iminazoleazodyestuffs |
| 05/04/1996 | CA2161947A1 Cationic imidazole azo dyes |
| 02/28/1996 | EP0698641A1 Cationic 1,3,4-thiadiazole dyes |
| 02/21/1996 | CN1117265A Cationic dyes for keratin-containing fibres |
| 02/14/1996 | EP0696619A1 Process for dyeing of paper |
| 11/15/1995 | EP0681464A1 Cationic dyes for keratin-containing fibres |
| 11/02/1995 | EP0679691A2 Cationic or basic aminobenzthiazole dyestuffs |
| 10/04/1995 | EP0675169A2 Cationic thiadiazole dyes |
| 08/09/1995 | EP0666287A2 Basic dyes based on amides of the 1-hydroxy-6-aminonaphthalene-3-sulfonic acid and intermediates thereof |
| 07/25/1995 | US5436323 Monoazo substituted dye for paper, celllulose and polyacrylonitrile |
| 07/20/1995 | DE19500203A1 Asymmetrical tetrakis:azo dyes useful for dyeing esp. wood-contg. paper |
| 06/13/1995 | US5424404 Biscationic azo dyes and intermediates therefor |
| 06/08/1995 | WO1995015144A1 Cationic dyes for keratin-containing fibres |
| 05/17/1995 | CN1102654A Cationic diazacyanine dye stuffs |
| 11/17/1994 | EP0624628A1 Cationic diazacyanine dyes |
| 11/10/1994 | DE4314787A1 N-Benzylated triazoleazo dyes and preparation thereof |
| 10/04/1994 | US5352334 The use of metal-free sulfo group free basic disazo compounds containing two identical 6-hydroxypyrid-2-one coupling component radicals for producing colored paper |
| 04/27/1994 | EP0594037A1 Basic dyes based on amides of I-acid (1-hydroxy-6-aminonaphthalene-3-sulfonic acid) and amides of I-acid |
| 04/20/1994 | CA2106830A1 Basic dyes based on amides of j-acid (1-hydroxy-6- aminonaphthalene-3-sulfonic acid) and amides of j-acid |
| 02/15/1994 | US5286854 Basic azo dyes with a coupling component of the hydroxynaphthalenecarboxylic acid series |
| 01/19/1994 | EP0579011A1 Cationic thiadiazolediphenylamine dyestuffs |
| 12/23/1993 | DE4220388A1 Cationic azo dyes - for keratin materials showing improved evenness |
| 11/23/1993 | US5264560 Preparation of quaternized azo dyes |
| 08/31/1993 | US5241054 Yellow, orange, red dye, especially for paper, cellulose |
| 08/25/1993 | EP0556556A1 Basic azo dyestuffs from coupling components of the hydroxynaphthalene carbonic acid series |
| 06/29/1993 | US5223626 Preparation of cationic alkylenediamine dye intermediates |
| 05/04/1993 | US5208325 Cationic 1,3,4-thiadiazole dyestuffs |
| 03/04/1993 | DE4128490A1 New cationic thiazole azo dyestuff cpds. - used on polyacrylonitrile or paper or keratinous material, prepd. from methyl amino carbo-methoxy-thiazolyl-acetate and tert. aniline |
| 02/18/1993 | DE4225873A1 Quaternised azo dyestuff prodn. - by reacting neutral dyestuff with alkylating agent in gamma-butyrolactone as biodegradable diluent giving soln. ready for use without diluent exchange |
| 12/29/1992 | US5175260 Disazo dyes with hydroxysulfonylnaphthalene coupling components |
| 11/17/1992 | US5163972 Process for the dyeing of polyacrylonitrile materials with cationic benzo-thiazolium azo dye |
| 07/22/1992 | EP0495250A1 Cationic 1,3,4 thiadiazole dyes |
| 04/29/1992 | EP0482508A1 Biscationic azo dyes and their intermediates |
| 03/18/1992 | EP0475154A1 Disazo dyes of which the coupling components are from the hydroxysulphonylnaphthaline series |
| 01/28/1992 | CA1294955C Coloring paper |
| 12/31/1991 | US5077396 Azo compounds containing two 6-hydroxypyrid-2-one coupling component radicals the nitrogen atoms of which are linked by a biscationic radical |
| 10/22/1991 | US5059683 Dyeing paper, textiles, leather |
| 08/06/1991 | US5037964 Dyes For Paper And Textiles |
| 07/17/1991 | EP0437105A1 Intermediates and colorants having primary hydroxyl enriched poly(oxyalkylene) moieties and their preparation |
| 06/26/1991 | EP0434623A1 Cationic azo dyes |
| 06/26/1991 | EP0434609A1 Process for dying polyacrylonitrite materials |
| 06/11/1991 | US5023324 Lightfastness, water fastness |
| 03/19/1991 | US5001229 Water soluble basic dyestuffs |
| 03/19/1991 | US5001226 Brown dyes for printing and dyeing paper, leather and textile substrates; color- and washfastness |
| 03/05/1991 | US4997918 Colorfast |
| 09/25/1990 | CA1274506A1 Process for preparation of concentrated anionic red dye solutions |
| 09/11/1990 | US4956456 Betaine-type cyan monoazo dyes for dying and printing fibrous materials |
| 07/10/1990 | US4940783 Disazo containing diaminostilbene as diazo component and an aniline coupling component bearing a cationic alkyl ammonium group |
| 06/19/1990 | US4935499 Cationic azo dyes with a 1-hydroxynaphthalene 3-sulfonic acid coupling component, useful for coloring paper |
| 05/30/1990 | EP0370953A2 Process for the preparation of dye intermediates |
| 05/15/1990 | US4925926 Preparation of cationic azo or hydrazone dyes in which the alkylation and the separation of the cationic dye are carried out continuously |
| 05/01/1990 | US4921945 Disazo dyes containing an acetoacetabukube coupling component and a quaternized aminoalkylene aminocarbonyl group bound to it |
| 04/24/1990 | US4920208 Basic azo dyestuffs |
| 04/12/1990 | DE3932566A1 New basic pyridone dis to tetrakis and dyestuff cpds. - used for dyeing e.g. leather, cellulose fibre and paper |
| 01/03/1990 | EP0348497A1 Non-linear optical material containing a hemicyanine compound and process for producing it |
| 11/14/1989 | US4880916 Cationic azo dyes containing 2(p-aminophenyl)oxazolo [4,5-b]pyridines and similar compounds as diazo components |
| 11/08/1989 | EP0341214A2 Basic 6-hydroxypyrid-2-one compounds |
| 10/31/1989 | US4877412 Sulfo group-containing monoazo compounds having an unsubstituted or substituted 4-(benzothiazol-2'-yl)phenyl or 4-(6'-benzothiazol-2"yl)-benzothiazol-2'-yl)phenyldiazo component radical and a 6-hydroxypyrid-2-one coupling component radical |
| 10/24/1989 | US4875903 Monoazo compounds containing a 2-sulfophenyl diazo component radical and a 1-hydroxy-naphthalene-sulfonic or disulfonic acid coupling component radical and two substituted 1,3,5-triazine rings |
| 10/10/1989 | US4873319 Disazo dyes containing a pyrimidine coupling component and a cationic alkyl ammonium group |
| 07/06/1989 | DE3743833A1 Amphiphile hemicyanine Amphiphilic hemicyanines |
| 06/29/1989 | WO1989005843A1 Non-linear optical material containing a hemicyanine compound and process for producing it |
| 06/28/1989 | EP0321778A2 Basic dyes |
| 06/20/1989 | US4840641 Cationic diazacyanine dyestuffs for dyeing polyacrylonitrile-wool blends |
| 06/13/1989 | US4839468 Water soluble dyes |
| 05/24/1989 | EP0198848B1 Anionic monoazo compounds of the benzothiazole series |
| 05/09/1989 | US4829185 Neutron and/or gamma radiation detecting system |
| 04/26/1989 | EP0312838A2 Basic azodyes, their preparation and their use |
| 04/04/1989 | US4818815 Cationic 1,2,3-thiadiazole-azo-aniline or tetrahydroquinoline compounds |
| 03/08/1989 | EP0306452A2 Cationic disazo stilbene dyes |
| 01/12/1989 | DE3821627A1 New cationic diazo dyestuff cpds. prepn. and use as ink and dye - e.g. benzanilide-4,4'-diazo-bis -4-4-acetyl:acetamido-3'-(N,N,N -trimethylaminopropyl)-benzamide chloride-metho:sulphate |
| 01/04/1989 | EP0105031B1 Cationic azo dyestuffs |
| 12/07/1988 | EP0294330A2 Cationic disazo dyes |
| 10/25/1988 | US4780106 Colorfastness, waterfastness |
| 10/19/1988 | EP0286971A2 Cationic diaza cyanine dyes |
| 09/28/1988 | EP0284567A2 Cationic azo dyes |
| 09/14/1988 | EP0281920A2 Dyestuffs with N-(2-aminomethyle)-piperazine groups and their use |
| 08/16/1988 | US4764175 Metal-free monoazo and disazo compounds having a 1-hydroxy-5,6-, 7- or 8- substituted 1,3,5-triazinylamino-3- or 4 sulfonic acid coupling component radical and 1:1 copper complexes |
| 07/27/1988 | EP0275381A2 Dye transfer process |
| 07/26/1988 | US4760049 Sublimation or vaporization using thermal printing head |
| 06/28/1988 | US4754022 Cationic dyes from diazotized 5-aminoisothiazoles and tetrahydroquinolines or indolines |
| 06/22/1988 | EP0272212A2 Process for continually producing azo or hydrazone dyes |
| 05/03/1988 | US4742161 Disazo and trisazo compounds containing one 6-hydroxypyrid-2-one coupling component radical per azo radical |
| 05/03/1988 | US4742160 Sulfo group-containing basic azo compounds having a central 1,3,5-triazine ring and two terminal 1-hydroxynaphthyl-2 groups and 1:1 and 1:2 metal complexes therof |
| 04/06/1988 | EP0263073A2 Cationic disazo dyes |
| 04/05/1988 | US4736021 4-Benzothiazolyl phenyl azo dyes |