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| Number | Title | Issue Date |
| 7078497 | Disazo dyes, and copper complexes thereof, for dyeing paper The dyes of formula (1) according to claim 1 and the copper complexes of dyes of formula (2) according to claim 9 or the mixtures of mono-copper complex with the bis-copper complex are excellently suitable for dyeing paper with good light-fastness prop... | 07/18/2006 |
| 6143062 | Water-soluble disazo compounds, aqueous ink compositions, and colored articles Are disclosed disazo compounds represented by the general formula (1): ##STR1## wherein A represents a phenylene or naphthylene group which may be optionally substituted; each of R1 and R2 represent independently a hydrogen atom... | 11/07/2000 |
| 5882391 | Bisazo inkjet dyes A bisazo dye of Formula (1) and salts thereof: ##STR1## in which R is H or ##STR2## R1 and R2 each independently is H, optionally substituted C1-4 -alkyl or optionally substituted aryl; R3 and R5 | 03/16/1999 |
| 5494507 | Dye having hydrophobic substituent and aqueous ink A dye having a representative formula as follows and an ink providing waterfast printing having the dye, in which a surfactant is not essential: ##STR1##... | 02/27/1996 |
| 5370730 | Dye composition and aqueous ink derived therefrom Dye compositions and aqueous inks derived therefrom, especially suitable for use in ink jet printing in which the dye composition contains (a) one or more dyes which, in the free acid form, are of Formula (1): ##STR1## wherein W is H or COOH; X is H ... | 12/06/1994 |
| 5203912 | Anionic dye A dye which, in the free acid form, has the formula ##STR1## wherein W is COOH X is selected from H, COOH, SO3 H, halo, hydroxy, nitro, cyano, C1-6 -alkyl, C1-6 -alkoxy and C1-6 -acylamino; Y is H, COOH or SO | 04/20/1993 |
| 5062893 | Ink formulations by mixing anionic waterfast dyes containing two or more carboxyl groups Inks are provided comprising (a) at least two dyes corresponding to the formula ##STR1## wherein W is COOH, X is H, or COOH, Y is H, COOH, or SO3 H, Z is H, COOH, or SO3 H, and R is H, CH2 COOH, or CH2 CH2 | 11/05/1991 |
| 4973672 | Water-soluble aminonaphthol disazo dyestuffs, their preparation and their use Coloring natural or synthetic fiber material containing hydroxyls or nitrogen is achieved by printing or dyeing the fiber material with a water-soluble disazo dyestuff of the formula ##STR1## wherein R1 is alkyl, alkoxy or alkoxyethoxy, ea... | 11/27/1990 |
| 4963189 | Waterfast ink formulations with a novel series of anionic dyes containing two or more carboxyl groups Inks are provided comprising (a) a dye corresponding to the formula ##STR1## wherein W is COOH, X is H, or COOH, Y is H, COOH, or SO3 H, Z is H, COOH, or SO3 H, and R is H, CH2 COOH, or CH2 CH2 COOH; with ... | 10/16/1990 |
| 4752337 | Recording liquid for ink jet recording systems Recording liquid for ink jet recording systems containing dyestuffs of the formulae ##STR1## with the substituent definitions given in the description. They form high-contrast images of high fastness to water, light and abrasion.... | 06/21/1988 |
| 4562249 | Bis(4-((chloro substituted phenyl)azo)anilino methylenes There are described novel yellow to red azo compounds of the formula I ##STR1## wherein each D independently of the other is the radical of an aromatic or heterocyclic diazo component, each Z independently of the other is hydrogen or a C1 ... | 12/31/1985 |
| 4519935 | Liquid-crystalline material containing azo dyestuffs Liquid-crystalline material containing an azo dyestuff of the formula ##STR1## in which A and B are radicals of coupling components in particular of the benzene, naphthalene and pyrazole series and R1, R2, R3, R4 | 05/28/1985 |
| 4123428 | Metallized polyazo dyes derived from a coupling component obtained by acidic condensation of formaldehyde with at least one phenolic compound Metal complex polyazo dyes having, as a coupling component radical, the radical of a coupling component K, being the product of the condensation, under acidic conditions, of the formaldehyde with a compound or mixture of compounds of formula (a), ##S... | 10/31/1978 |
| 4008215 | Sulfonic-acid substituted disazo dyestuffs Dyestuffs of the formula: ##STR1## are described, wherein K denotes the radical of a coupling component KH which can belong to the benzene, naphthalene or heterocyclic series. The dyestuffs are prepared by one-sided coupling of tetrazotized 4,4'... | 02/15/1977 |
| 3941768 | One step diazotization coupling process A process for producing metal-free azo pigments in purely organic liquid or aqueous/organic liquid containing at most 10% of water calculated on the total weight of the suspension is described. In this one-step process, a suitable aromatic amine is diazot... | 03/02/1976 |
