| Patents for C09B 57 - Other synthetic dyes of known constitution (5,224) |
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| 06/26/1991 | EP0433854A2 3-Aminopyrazolo heterocycles, their use for the determination of hydrogen peroxide, hydrogen peroxide forming systems, peroxidase, peroxidant active substances or electron rich aromatic compounds, corresponding determination process and agents |
| 06/25/1991 | US5026905 Fluorescent dyes |
| 06/25/1991 | US5026867 Improved hue and high molecular extinction coefficient; sharp visible absorption spectra; color photography |
| 06/25/1991 | US5026677 Dyes and dye-donor elements for use in thermal dye sublimation transfer |
| 06/25/1991 | US5026401 Dyeing compositions for kerating fibres based on nitroanilines and nitroanilines for use therein |
| 06/19/1991 | CN1052345A Rope-dyeing dyes and dye compositions, dyeing methods using same, as well as dyed materials |
| 06/18/1991 | US5024786 Detergent compositions containing an anionic surfactant and a 4,4'-bis(triazinylamino)-stilbene disulphonic acid optical brightener |
| 06/18/1991 | CA1284932C Biological and analytical uses of phenalenone and benzphenalenone compounds |
| 06/12/1991 | EP0431906A2 Cotton rope-dyeing methods |
| 06/12/1991 | EP0431425A2 Chromogen enamine compounds, their preparation and use as colour formers |
| 06/05/1991 | EP0430875A2 Water-based coating materials containing specific modified organic pigments |
| 06/04/1991 | US5021573 Heterocyclic pigments and dyes |
| 05/22/1991 | EP0427993A2 Heterocyclic compounds and their use as pigments and dyes |
| 05/21/1991 | US5017706 Monoketopyrrolopyrroles |
| 05/15/1991 | EP0427670A1 Liquid detergent |
| 05/15/1991 | EP0427048A2 Metal complex compounds |
| 05/15/1991 | EP0427040A1 Paper-coating compositions comprising whitening agents |
| 05/15/1991 | EP0427007A1 Azulene squaric acid dyes containing amid groups, their intermediary products and optical recording medium |
| 05/15/1991 | EP0426719A1 A hair dye |
| 05/15/1991 | EP0426717A1 Optical memory. |
| 05/08/1991 | CA2029319A1 Liquid detergents |
| 05/07/1991 | US5013844 Photographic emulsions, high contrast |
| 05/07/1991 | CA1283925C Compositions used to dye keratinous fibers, specifically human hair, the said dye containing the precursors of oxydative dyes and heterocyclic couplers, process in which the said compositions are used, novel heterocyclic couplers used and process for their preparation |
| 05/05/1991 | CA2029220A1 Brightener-containing paper-coating compositions |
| 05/02/1991 | WO1991005539A1 Oxidation dyes, their production and use |
| 05/02/1991 | EP0424777A1 Azulene squaric acid dyes containing ester groups, their intermediary products and optical recording medium |
| 05/02/1991 | EP0424759A2 Process for the manufacture of pigments on the basis of isoindole |
| 04/25/1991 | DE3935128A1 Oxidationsfaerbemittel, dessen herstellung und anwendung An oxidation colorant, its preparation and application |
| 04/17/1991 | EP0422474A2 Fluorescent pigments |
| 04/02/1991 | US5004813 Chromogenic phthalides and azaphthalides |
| 04/02/1991 | US5004662 Electrophotographic photosensitive material containing m-phenylenediamine compound |
| 03/26/1991 | US5002863 Methine dyes |
| 03/19/1991 | US5001253 Fluorescent brighteners consisting of bis-styrylbenzene compounds, a process for their preparation and their use |
| 03/13/1991 | EP0416675A1 High stability pigments belonging to the 1,4-diketone pyrrole-[3,4-C]-pyrroles and new pyrrole-[3,4-C]-pyrroles series, suitable for the purpose |
| 03/13/1991 | EP0416434A2 Triazole pyridine dyes and a thermal transfer process of methine dyes |
| 03/12/1991 | US4999186 Novel sunscreen agents, sunscreen compositions and methods for preventing sunburn |
| 03/05/1991 | US4997805 Heat sensitive recording material containing chromogenic dicyanomethylenepyrazolinones |
| 03/05/1991 | CA2023146A1 High stability pigments belonging to the 1,4-diketone pyrrole-¬3,4-c|-pyrroles and new pyrrole-¬3,4-c|-pyrroles series, suitable for the purpose |
| 02/27/1991 | EP0414585A1 Keratinous fibres dye composition containing an indole dye and at least a paraphenylenediamine having a secondary amino group and process |
| 02/27/1991 | EP0413926A1 Liquid detergent composition containing a whitening agent |
| 02/21/1991 | WO1991001890A1 Thermal transfer sheet |
| 02/20/1991 | EP0413020A1 Pyrazolotriazoles and processes for their formation |
| 02/12/1991 | US4992381 Method of detecting electrolytes in an aqueous test sample using chromogenic hemispherands and test device therefor |
| 02/12/1991 | US4992101 Process for the preparation of opaque diketopyrrolo-pyrrole pigments |
| 02/05/1991 | US4990649 Optical recording media |
| 01/29/1991 | CA1279562C Use of polymeric mordants to increase the intensity of rigid fluorescent dyes |
| 01/25/1991 | WO1991001312A1 Novel photoactive compounds |
| 01/25/1991 | CA2065005A1 Photoactive compounds |
| 01/22/1991 | US4986935 Nonlinear optical devices; compound having high activity for second harmonic wave generation |
| 01/22/1991 | US4986852 Pigments and use thereof |
| 01/22/1991 | CA2021719A1 Dye composition for keratin fibers using indolic colorant and at least one paraphenylenediamin including a secondary amino group, and process for application |
| 01/09/1991 | EP0406333A1 A heat sensitive recording element and a thermographic method. |
| 01/09/1991 | CA2020666A1 Liquid detergents |
| 01/08/1991 | US4983741 1,2,4,5-benzoylenebis(naphtho[2,3-d]imidazole) compounds and photosensitive members containing them |
| 01/01/1991 | US4982112 Nonlinear optical material |
| 12/27/1990 | EP0403812A2 Diketopiperazine derivatives, their preparation and their use as dyestuff |
| 12/27/1990 | CA1278151C Method for improving strength of dry dye particles and reducing explosion hazards |
| 12/05/1990 | EP0400706A1 Dyes and dye-donor elements for use in thermal dye sublimation transfer |
| 12/04/1990 | US4975409 Heat transfer dye providing material |
| 12/04/1990 | CA1277132C Chemiluminescent composition |
| 11/30/1990 | CA2016687A1 Dyes and dye-donor elements for use in thermal dye sublimation transfer |
| 11/20/1990 | US4971596 Process for dyeing hair with hydroxyquinone dyes and metal salts |
| 11/14/1990 | EP0397170A1 Disperse benzodifuranone dye compounds, their production and their use for dyeing or printing hydrophobic fibers |
| 11/14/1990 | EP0396828A1 Unsymmetrical squaraine compositions and photoconductive imaging members using such compositions |
| 11/13/1990 | US4970310 Isoindoline pigment compounds |
| 11/13/1990 | US4970308 Di(bis-(indolyl)ethylenyl)tetrahalophtalides |
| 11/13/1990 | US4970248 Gamma modification of an azine pigment |
| 11/06/1990 | US4968657 Thermal transfer printing |
| 10/31/1990 | EP0395588A1 Dibenzofuranylbiphenyls |
| 10/31/1990 | EP0394998A2 Liquid detergent |
| 10/30/1990 | US4966930 Colorfastness |
| 10/28/1990 | CA2015565A1 Liquid detergent compositions |
| 10/18/1990 | DE4011927A1 New di:keto di:hydro-pyrrolo-pyrrole cpds. and di:thio cpds. - for dyeing cellulosic and nitrogenous material, e.g. polyamide |
| 10/16/1990 | US4963451 1,2,4,5-benzoylenebis(anthraquinone[1,2-d]imidazole) compounds and photosensitive members containing them |
| 10/09/1990 | US4962040 For colorimetric quantitative analysis |
| 10/02/1990 | US4960895 4'-alkoxy-2,2':6',2"-terpyridine derivatives |
| 09/27/1990 | DE3908312A1 Novel fluorescent perylene and diketopyrrolopyrrole colour pigments |
| 09/19/1990 | EP0387595A2 Heterocyclic compounds |
| 09/05/1990 | EP0385580A1 A toner for use in the development of electrostatic latent images |
| 09/05/1990 | EP0385330A2 Mixtures of dyestuffs comprising azo compounds on the basis of phenylox diazolyl aniline |
| 08/23/1990 | WO1990010004A1 Pyrazolotriazoles and processes for their formation |
| 08/23/1990 | CA2026440A1 Pyrazolotriazoles and processes for their formation |
| 08/21/1990 | US4950754 Chromogenic dicyanomethylenepyrazolinones |
| 08/21/1990 | CA1273023A1 Hydrolyzable fluorescent substrates for phosphatases and analytical use thereof |
| 08/08/1990 | EP0380642A1 Liquid crystal display devices and liquid crystal medium to be used therein |
| 07/18/1990 | EP0378510A2 Disperse dyes |
| 07/03/1990 | US4939012 Semiconductor laser sensitive |
| 06/26/1990 | US4937160 High contrast |
| 06/20/1990 | EP0373572A1 Thermally-transferable fluorescent compounds |
| 06/12/1990 | US4933471 Fluorescent, used in cell analysis, carboxy or sulfo substituted |
| 06/12/1990 | US4933448 Chromogenic lactone compounds of benzopyrano-2H-pyrazoles |
| 06/12/1990 | CA2004697A1 Thermally-transferable fluorescent compounds |
| 06/07/1990 | DE3939332A1 N-alkylated 1,8-naphtho:lactam(s) prodn. - by reacting 1,8-naphtho:lactam with an aryl or alkyl sulphonic acid alkyl ester under alkaline conditions in the melt |
| 06/06/1990 | EP0371223A1 Heterocyclic disperse dye compounds, their production and their use for dyeing or printing hydrophobic fibers |
| 06/05/1990 | US4931066 Hair dye mixture of direct dye and xanthine derivative |
| 05/30/1990 | EP0370693A2 Novel onium salts and the use thereof as photoinitiators |
| 05/23/1990 | EP0369599A1 Tint compositions useful for providing coloration to aqueous and non-aqueous liquids |
| 05/21/1990 | CA2002873A1 Onium salts and the use thereof as photoinitiators |
| 05/15/1990 | US4925595 Storage stable detergent |
| 05/09/1990 | EP0367067A2 Process for the preparation of vat dyestuffs and pigments of the perinone series |