| Patents for C09B 31 - Disazo or polyazo dyes of the type a b c, a b c d, or the like, prepared by diazotising and coupling (1,445) |
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| 08/28/1985 | EP0152765A2 Disozo dyestuffs, process for their preparation and their use |
| 08/13/1985 | US4535044 Photosensitive material for electrophotography containing photosensitive layer incorporating pentakisazo pigment |
| 06/04/1985 | US4521217 Phthalocyanine and azo dyestuff mixtures and their use for dyeing paper |
| 05/08/1985 | EP0140252A2 Polyazo dyes |
| 04/30/1985 | US4514045 Helichromic-smectic liquid crystal compositions and display cells |
| 03/20/1985 | EP0134471A1 Azo dyestuffs and liquid-crystal materials containing these dyestuffs |
| 01/23/1985 | EP0131757A1 Disazo dyestuffs of the isothiazole series |
| 01/22/1985 | US4494957 Mixture of disazo and monoazo dyes |
| 01/15/1985 | US4493532 Pleochroic azo dyes, a liquid crystal composition containing the azo dyes and a display device using the liquid crystal composition |
| 01/15/1985 | CA1181066A1 Monoazo and disazo dyestuffs containing aminoalkylenesulfonamido moieties |
| 12/27/1984 | CA1180007A Organic compounds |
| 11/27/1984 | US4485042 Dyestuff containing at least three azo bridges |
| 11/27/1984 | CA1178579A1 Organic compounds |
| 11/20/1984 | US4483795 Substituted phenyl disazo dyes containing a 2-amino-substituted thiazole radical |
| 11/20/1984 | US4483593 Guest-host type liquid crystal composition and liquid crystal display device |
| 11/06/1984 | CA1177482A1 Organic compounds |
| 10/30/1984 | US4480019 Electrophotographic photosensitive material |
| 10/24/1984 | EP0122458A1 Azo compounds |
| 10/16/1984 | US4477368 Color display liquid crystal composition |
| 10/03/1984 | EP0120255A1 Reactive dyes |
| 09/25/1984 | US4473376 Dye mixtures of azo compounds soluble in organic solvents |
| 08/22/1984 | EP0116314A2 Disazo dyestuffs having a monofluorotriazinyl group |
| 08/21/1984 | US4466920 Disazo compounds having a further unsubstituted or substituted sulfophenyl diazo component radical and a 4-alkoxy- or arylsulfonyloxy benzene coupling component radical having an acylamina substituent |
| 07/25/1984 | EP0114043A2 Dye mixtures and their use in the dyeing of paper |
| 07/03/1984 | CA1170254A1 Dyes containing imidazolylmethylene groups |
| 06/27/1984 | EP0111779A2 Azo dyestuffs and liquid crystal matter containing azo dyestuffs |
| 06/26/1984 | US4456668 Azo dyes containing phosphamic acid diester groups |
| 06/12/1984 | US4453944 1-isopropoxypropyl-3-cyano-6-hydroxy-4-methyl-2-pyridone azo dye derivative |
| 05/29/1984 | US4451398 Dyes containing imidazolymethylene groups |
| 05/16/1984 | EP0108570A2 Disazo dyestuffs for cellulose-containing fibres and process for preparing the dyestuff |
| 05/02/1984 | EP0107492A2 Helichromic-smectic liquid crystal compositions and display cells |
| 05/02/1984 | EP0107067A1 Disazo dyestuffs |
| 04/03/1984 | US4440681 Polyesters, cellulose acetate, polyacrylamide |
| 03/27/1984 | US4439362 Disperse dyes, polyesters |
| 02/14/1984 | US4431585 Water-insoluble azo dyestuffs, processes for their manufacture and their use for dyeing and printing synthetic hydrophobic fiber material |
| 01/18/1984 | EP0098522A2 Liquid crystal composition |
| 01/18/1984 | EP0098430A2 Triazine compounds, their preparation and their use |
| 01/17/1984 | US4426312 Liquid crystal material containing disazo dyestuffs |
| 01/11/1984 | EP0097838A1 Disazo dyestuffs |
| 01/04/1984 | EP0097289A2 Azo dyestuffs |
| 01/03/1984 | US4424155 3-amino-1,2,4-oxadiazol-5-yl derivatives |
| 01/03/1984 | US4424154 Azo dye having a 3-cyano- or 3-carbamoyl-2,6-diaminopyridine coupling component |
| 12/20/1983 | CA1159082A1 Process for the preparation of 4,4'-dinitrostilbene- 2,2'-disulfonic acid and its salts |
| 12/06/1983 | US4419290 Diazo dyes having a coupler component attached to a sulfaphenyl-azo-phenyl-azo-radical |
| 11/16/1983 | EP0094079A1 Photosensitive material for electrophotography |
| 11/01/1983 | US4412950 Monoazo and disazo colorants |
| 10/25/1983 | US4411812 Dichroic liquid crystal compositions made with asymmetric tris-azo dyes |
| 10/19/1983 | EP0091882A1 Stable dyestuff, process for preparing it and its use in dyeing and printing synthetic and semi-synthetic fibres |
| 10/19/1983 | EP0091833A1 Electrophotographic photosensitive material |
| 10/12/1983 | EP0091020A1 Disazo dyestuffs |
| 10/11/1983 | US4409143 Textiles, photography |
| 10/11/1983 | US4409142 Disazo compounds having a 5-amino or hydroxy-3-carboxy or methyl-1-substituted phenylphyrazole coupling component radical |
| 10/04/1983 | US4407748 Azo dyestuffs possessing antimicrobial properties |
| 08/31/1983 | EP0087248A1 Liquid crystal composition containing azo dyes |
| 08/30/1983 | US4401369 Nematic host, cholesteric component and tetrakisazo dye |
| 08/23/1983 | US4400059 Liquid crystal display device |
| 08/23/1983 | CA1152545A1 Anti-paralleling apparatus for high-voltage gear |
| 08/16/1983 | US4399068 Concentrated, aqueous solutions of salts of acetoacetylamino-arylsulphonic acids and method of forming concentrated solutions of azo dyestuffs therefrom |
| 07/27/1983 | EP0084208A2 Asymmetric dichroic dye molecules having polyazoaryl linking groups and substituted aryl thiazyl substituents |
| 07/26/1983 | US4395350 Liquid crystal mixtures |
| 07/06/1983 | EP0083009A1 Dispersion dyestuffs |
| 06/01/1983 | EP0080153A1 Pleochroic azo dyes, a liquid crystal composition containing the azo dyes and a display device using the liquid crystal composition |
| 06/01/1983 | EP0080094A1 Copper-containing reactive disazo dyestuffs; process for their preparation and their use in dyeing and printing hydroxyl and/or nitrogen containing materials |
| 05/24/1983 | US4384870 Disazo compounds having a sulfo group-containing diazo component radical, a 1,4-phenylene middle component radical having a substituted amino group and a coupling component radical having a free, acylated or etherified hydroxy group |
| 04/26/1983 | CA1145331A1 Anionic dyestuffs |
| 04/13/1983 | EP0076633A1 Guest-host type liquid crystal composition |
| 03/22/1983 | US4377519 Navy blue water-soluble sulfophenyl- or sulfonaphthyl-azo-1,4-phenylene-azo-5-(8-anilinonaphthalene-1-sulfonic acid) dyes for polyamides |
| 03/15/1983 | US4376729 Novel monoazo and disazo colorants |
| 03/09/1983 | EP0073387A1 Water-soluble polyazo dyestuffs, their preparation and their use |
| 03/09/1983 | EP0073369A1 Dyestuff preparations and methods of dyeing and printing high molecular-weight hydrophobic materials |
| 02/22/1983 | US4374769 Water-soluble tris phenyl bisazo dyes for polyamide fibers |
| 02/15/1983 | US4374064 Metal complexes of disazo compounds having a 5-amino or hydroxy-3-carboxy or methyl-1- substituted phenylpyrazole coupling component radical |
| 02/08/1983 | US4372885 Bisazo dyes containing a 2-amino-substituted thiazole radical |
| 02/01/1983 | CA1140330A1 Pleochroic dyes suitable for use in solution with liquid crystal materials for electro-optic device applications |
| 01/04/1983 | US4367173 Azo pigments containing pyrazoloquinazolone radicals |
| 01/04/1983 | US4367172 Disazo dyes containing at least one sulfo group and at least two basic or cationic groups |
| 12/21/1982 | CA1137980A1 Azo dyes |
| 12/15/1982 | EP0066781A2 Sulphonic acid groups containing disazo dyes |
| 12/14/1982 | US4363761 Dyeing cellulose and leather; textiles; papermaking |
| 12/01/1982 | EP0065811A1 Disperse azopyrimidine dyestuffs |
| 11/24/1982 | EP0065130A1 Tris-azo dyestuffs |
| 11/16/1982 | US4359418 Yellow, orange color |
| 10/13/1982 | EP0062200A1 Disazo dyestuffs |
| 09/29/1982 | EP0061181A1 Guest-host type liquid crystal composition and liquid crystal display device |
| 09/28/1982 | CA1132541A1 Developed direct black dye |
| 09/01/1982 | EP0059165A1 Method and dyestuffs for dyeing cellulosics and blends thereof without afterwash |
| 08/17/1982 | US4344880 Disazo dyestuffs having an acylamino group and an aromatic-oxy group on different terminal moieties |
| 07/20/1982 | US4340385 Stable, concentrated, aqueous compositions containing para-sulfophenyl-azo-substituted 1,4-phenylene-azo-para-2-hydroxypropoxyphenyl dyes |
| 07/14/1982 | EP0055842A2 Mixtures of dyestuffs and liquid-crystal materials containing these mixtures |
| 07/14/1982 | EP0055838A2 Liquid cristalline material containing disazodyes |
| 06/30/1982 | EP0054858A1 Acid azodyestuffs with imidazopyridine coupling components, their preparation and use in dyeing of polyamid fibres |
| 06/02/1982 | EP0052716A1 Water-soluble azo compounds, methods for their preparation and their use as dyestuffs |
| 05/11/1982 | US4329283 Hydroxypyridone azo dyestuffs |
| 05/05/1982 | EP0051041A1 Basic or cationic sulphonic acid group-containing azo compounds, their synthesis and their use in dyeing substrates containing paper or cotton as well as dyestuff preparations thereof |
| 04/20/1982 | US4325870 Diazotization, amination |
| 04/20/1982 | CA1122205A1 Direct black dye |
| 04/06/1982 | US4323498 Carbocyclic disazo compounds containing a 2-amino-8-hydroxy-5- or 6-sulfo-naphthalene-2 coupling component radical |
| 03/31/1982 | EP0048538A1 Azo dyes |
| 02/16/1982 | US4315855 Monoazo disperse dyes containing a nitrophenyl group and a homophthalimide group |
| 02/16/1982 | US4315756 Oil-soluble azo dye with N-substituted β-naphthylamine as coupling component |