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| Number | Title | Issue Date |
| 7358344 | Azo dye An azo dye represented by formula (I): A-N═N—B formula (I) wherein, A represents a group having a substituent required for inducing an intramolecular nucleophilic substitution reaction with a nitrogen atom of a r... | 04/15/2008 |
| 7358345 | Disperse azo dyestuffs The present invention claims dyestuffs of formula (I), wherein D, R1 to R7 and n are defined as given in claim 1, a process for their preparation and their use ... | 04/15/2008 |
| 6461416 | 1,3,4,-thiadiazolylazo dyes and ink compositions containing the same A dye of Formula (1): ##STR1## R1 and D are each independently H or a substituent; R2 and R3 are each independently optionally substituted alkyl, aryl or aralkyl, or R2 and R3 together with the carbon atom... | 10/08/2002 |
| 6187084 | Ink compositions An ink comprising water, a water-dissipatable polymer and one or more dyes of Formula (1): ##STR1## wherein: R1 is H or a substituent; R2 and R3 are each independently optionally substituted alkyl, aryl or aralkyl, or R | 02/13/2001 |
| 5789560 | Azo dyes with a coupling component of the aminothiazole series Azo dyes of the formula ##STR1## where D is the radical of a diazo component of the aniline series or the series of the aromatic heterocyclic amines, R1 and R2 are each C1 -C10 -alkyl, which may be substitu... | 08/04/1998 |
| 5723587 | Azo dyes Disperse dyes of formula ##STR1## wherein D is the radical of a diazo component of the benzene, naphthalene, diphenyl, azobenzene, thiophene, benzothiazole, benzisothiazole, thiazole, thiadiazole, indazole, benzotriazole, pyrazole, anthraquinone, ... | 03/03/1998 |
| 5696243 | Diphenylamine compounds, polymers prepared therefrom and non-linear optics devices containing the same Diphenylamines of the formula ##STR1## where the ring A can be benzo-fused, and D is aryl or a five-membered aromatic heterocyclyl which contains one to three hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur, in the hete... | 12/09/1997 |
| 5693766 | Dye diffusion thermal transfer printing A thermal transfer sheet comprising a substrate having a coating comprising a dye of Formula (1): ##STR1## wherein: Y is --H, alkyl, alkoxy, --NHCOalkyl, NHCOaryl, --NHSO2 alkyl or --NHSO2 aryl; Ring A is unsubstituted apart fro... | 12/02/1997 |
| 5663308 | Organosilicon polymers, and dyes, exhibiting nonlinear optical response Organosilicon polymers, including crosslinked polymers and crosslinkable prepolymers, of cyclic polysiloxane, organic dyes, and, optionally, polyenes. The dyes include those with delocalized Pi electron systems linking electron donor groups and electron a... | 09/02/1997 |
| 5652344 | 2-amino-5-nitrothiazole derived monoazo disperse dyes 2-amino-5-nitrothiazole derived compounds having the following formula: ##STR1## Wherein R1=H or alkyl of 1-4 carbons, R2=alkyl of 1-4 carbons or allyl group and R3=H, halogen or alkyl of 1-4 carbons. The invented compounds are suited for disperse dyestuf... | 07/29/1997 |
| 5616697 | Thiazolylazoaniline dyes for use in thermal dye sublimination transfer Dye-donor element for use according to thermal dye sublimation transfer comprising a support having thereon a dye layer containing a thiazolylazoaniline dye, said thiazolylazoaniline dye containing on the 4-position of the thiazolyl ring a substituent sel... | 04/01/1997 |
| 5616797 | N-(carbonyl, carbonimidoyl, carbonothioyl)sulfonamide charge control agents and toners and developers An electrophotographic toner having polymeric binder and a charge control agent selected from the group consisting of sulfonamides having the general structure: ##STR1## and metal salts thereof. T1 is independently selected from H, alkyl ... | 04/01/1997 |
| 5550218 | Azo compounds having unsubstituted or substituted 2-phenoxycarbonylethyl groups Compounds of the formula ##STR1## wherein A is C1-6 alkylene, D is a diazo component radical of the triazolyl, pyrazolyl, cyano(C1-4 alkyl)-imidazolyl, 4-chlorothiazolyl, 4-chlorotheinyl-2, 3-phenyl-1,2,4-thiadiazolyl-5, is... | 08/27/1996 |
| 5532342 | Azo metal chelate compound An azo metal chelate compound of an azo compound of the formula (I) with a metal: ##STR1## wherein A is a residue forming a heterocyclic ring together with the carbon atom and the nitrogen atom to which it is bonded, X is a residue forming an ar... | 07/02/1996 |
| 5514819 | Oxalylamino substituted indoaniline dyes The present invention provides a dye-donor element for use according to thermal dye sublimation transfer, said dye-donor element comprising a support provided with a dye layer containing a dye and a polymeric binder, characterized in that said dye corresp... | 05/07/1996 |
| 5466790 | Azo dyes with an acetalized diazo component of the thiophene or thiazole series Azo dyes of the formula ##STR1## where L1 is hydrogen, C1 -C8 -alkyl or phenyl, L2 and L3 are each substituted or unsubstituted C1 -C8 -alkyl, or together a radical of the formul... | 11/14/1995 |
| 5436323 | Cationic 1,3,4-thiadiazole dyestuffs Cationic 1,3,4-thiadiazolyldiphenylamine dyestuffs and corresponding anhydro bases, the dyestuffs having the formula (I) ##STR1## their preparation and their use, and materials dyed with such dyestuffs.... | 07/25/1995 |
| 5420254 | Disperse dyes A compound of the formula I ##STR1## in which D is a diazo component, K is an aromatic group of formula a, b or c, ##STR2## Y is C2-3 alkylene and the remaining symbols are as defined in the specification. These compounds are useful f... | 05/30/1995 |
| 5328994 | Azinoneutromethines New azinoneutromethines of the formula ##STR1## in which the symbols used have the meaning given in the description, a process for their preparation and their use in thermal and photochromic recording materials, as nonlinear optical materials, as pho... | 07/12/1994 |
| 5283326 | Dyes containing thiophene radicals The compounds of the general formula ##STR1## where X is fluorine, chlorine, bromine, SO2 E or unsubstituted or substituted hydroxyl or mercapto, E is alkyl, alkenyl, cycloalkyl, aralkyl, aryl, chlorine or unsubstituted or substituted hydr... | 02/01/1994 |
| 5278293 | Azo dyestuffs and intermediate products for their preparation Azo dyestuffs of the formula ##STR1## having the substituent meanings given in the description, are outstandingly suitable for dyeing and printing materials containing hydroxyl groups and amide groups.... | 01/11/1994 |
| 5208325 | Cationic 1,3,4-thiadiazole dyestuffs Cationic 1,3,4-thiadiazole dyestuff of the formula ##STR1## in which R1 and R2, independently of one another, denote hydrogen, alkyl, alkenyl, cycloalkyl, aralkyl, aryl, a heterocycle, said heterocycle having a direct bond to the nit... | 05/04/1993 |
| 5206376 | Preparation of 2-amino-5-formyl-4-halothiazoles A process for the preparation of 2-amino-5-formyl-4-halothiazoles by reaction, in a first stage, of thiourea with chloroacetic or bromoacetic acid in the presence of an N,N-disubstituted formamide, followed by treatment of the reaction mixture with a phos... | 04/27/1993 |
| 5186865 | Electro-optical materials and light modulator devices containing same Azo-type optically active compounds and polymers are provided based on compounds of the general structure [substituted aryl]--N.dbd.N--[substituted aryl] wherein aryl substituents are introduced which hinder or prohibit rotation around the single bonds of the ... | 02/16/1993 |
| 5055567 | Disperse dyes which are convertible into a thermo-migration fast form The dyes according to the invention consist of a chromophore and a radical which, on heating, forms an isocyanate or isothiocyanate group. The latter reacts with a suitable group in the environment. Dyeings of excellent thermomigration fastness are obtain... | 10/08/1991 |
| 5043269 | Chromogenic substrate to peroxidase enzymes A novel chromogenic substrate to peroxidase enzymes is provided which is comprised of a mixture of a colorless mixture of two compounds, such as, 3-methyl-2-benzothiazolinone hydrazone and 2-hydroxy-2,4,6-cycloheptatrienone, which undergo an oxidative cou... | 08/27/1991 |
| 4994563 | Monoazo dyes containing a 3-sulfoalkanoylamino or 3-sulfoalkylsulfonylaminoaniline coupling component The azo dyes of the formula ##STR1## in which D is a diazo component, R1 and R2 independently of one another are each a C1 -C10 alkyl, C5 -C7 cycloalkyl, phenyl or naphthyl radical eac... | 02/19/1991 |
| 4975410 | Thermally-transferred color filter array element and process for preparing A thermally-transferred color filter array element comprising a transparent support having thereon a thermally-transparent image comprising a repeating mosaic pattern of colorants in a receiving layer, one of the colorants being a mixture of a yellow dye ... | 12/04/1990 |
| 4960874 | Isothiazolylazo dyes having aminophenyl and aminonaphthyl components Compounds of the general formula I ##STR1## where R is alkyl or unsubstituted or substituted aryl and K is a radical of the formula ##STR2## B is C1 -C4 -alkyl or substituted amino, R1 is hydrogen, methyl, m... | 10/02/1990 |
| 4847365 | Metal complexes of substituted 4-(2-carboxy-phenylazo-5-pyrazolones The invention relates to novel 1:1 metal complexes of a divalent transition metal and an azo compound of the formula (1) ##STR1## wherein X is a hydrogen or a halogen atom, an alkyl, alkoxy, aryloxy, nitro, acylamino, ureido, arylureido, thioureido, ... | 07/11/1989 |
| 4837308 | Process for the preparation of azo compounds A universally usable process for preparing azo dyestuffs by oxidative coupling consists in carrying out the oxidation in the presence of redox mediators with a standard potential of 0.2-1.5 volts and, if appropriate, an additional oxidizing agent with a s... | 06/06/1989 |
| 4835261 | Nonionic azo compounds in which the coupling component is a 3,4-dialkoxy aniline derivative Azo compounds of the formula I ##STR1## where D=diazo component R1 and R2 =alkyl or aralkyl X=H, hydrocarbon radical or acyl are useful dyestuffs or dyestuff intermediates.... | 05/30/1989 |
| 4818815 | Cationic 1,2,3-thiadiazole-azo-aniline or tetrahydroquinoline compounds The invention relates to novel 1,2,3-thiadiazole-axo compounds of formula ##STR1## wherein R is unsubstituted or substituted alkyl or alkenyl, R1 is hydrogen or unsubstituted or substituted alkyl or alkenyl, R2 is hydrogen or unsubstitute... | 04/04/1989 |
| 4810783 | Process for the preparation of azo dyestuffs having an aniline-type coupler by aminolysis of the appropriate ether group-containing compounds An azo dyestuff of the formula ##STR1## wherein D=a diazo component, R1 and R2 =alkyl or aralkyl, R3 =H, R or OR1 and R4 =a hydrocarbon radical or acyl, which are prepared in a simple manner by aminolysis ... | 03/07/1989 |
| 4801696 | Phenylazocyanothiopheneazoaniline dyes for dyeing cellulose-containing fibers in blue to bluish green shades Disazo dyes for dyeing cellulose-containing fibers represented by the following general formula: ##STR1## wherein R1 and R2 each represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a thiocyanato group, a tr... | 01/31/1989 |
| 4795807 | Preparation of azo dyestuffs by diazotization and coupling in the presence of an ester Azo disperse dyestuffs are prepared by diazotization and coupling in an aqueous phase, the coupling being carried out in the presence of an ester of a lower aliphatic carboxylic acid.... | 01/03/1989 |
| 4795712 | Calcium complexing dyes and their use in analytical compositions, elements and methods Novel chromogenic derivatives of 1,2-bis-(o-aminoaryloxy)ethane-N,N,N',N'-tetraacetic acid are useful for the determination of calcium ions in both solution and dry assays. These compounds comprise a dye moiety which is directly conjugated to the acetic ... | 01/03/1989 |
| 4769447 | Gamma-Glutamyl-4-azoanilides The present invention provides gamma-glutamyl-4-azoanilides, processes for their preparation and their use as substrates for gamma-glutamyl transferase determination, of the formula ##STR1## wherein X is alkyl, --(CH2)m --COOH o... | 09/06/1988 |
| 4764600 | Isothiazolylazo dyes having aminophenyl and aminonaphthyl components An isothiazolylazo dye of the formula I ##STR1## wherein R is an alkyl group or unsubstituted aryl or substituted aryl group selected from the group consisting of ##STR2## and K is a radical of the formula ##STR3## where B is C1 | 08/16/1988 |
| 4743683 | Imidazole azo dyes A photographic recording material which contains at least one dye of the formula ##STR1## wherein D is the group of atoms necessary to complete a 5-membered ring that contains at least one nitrogen atom, A is hydrogen, alkyl, alkoxy, phenyl, alk... | 05/10/1988 |
