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| Number | Title | Issue Date |
| 7371831 | Azo dyestuffs Compounds of formula (I) wherein all substituents have the meanings as defined in the Specification, their production and their use. ... | 05/13/2008 |
| 7173114 | Lightfast colorant and lightfast ink composition including the same A lightfast colorant and a lightfast ink composition including the lightfast colorant utilize a lightfast colorant that is derived by covalently binding a cinnamate derivative and a conventional colorant. The lightfast colorant improves storage stability as well as ... | 02/06/2007 |
| 7125443 | Lightfast colorant and lightfast ink composition including the same A lightfast colorant and a lightfast ink composition include a lightfast colorant that is derived by covalently binding a benzophenone derivative and a conventional colorant and that imparts effective lightfastness and long-term storage stability to an ink compositi... | 10/24/2006 |
| 6399752 | Polyazo compound or salt thereof and dye-based polarization film containing the same A polyazo compound or salt thereof of the following formula (I): ##STR1## wherein, A represents a naphthyl having 1 to 3 sulfos or a phenyl having 1 to 2 hydrophilic groups selected from sulfo and carboxyl and optionally having a lower alkyl or lower alko... | 06/04/2002 |
| 6005085 | Condensed azo compounds and process for preparing the same The present invention provides novel condensed azo compounds using bisamide compounds of 2-hydroxynaphthalene-3,6-dicarboxylic acid, amide, or ester as the couplers, which have excellent properties such as excellent water resistance, chemical resistance, ... | 12/21/1999 |
| 5965715 | Bisazo compounds and process for the preparation thereof The invention provides novel bisazo compounds which is obtained by coupling two molecules of a 2-hydroxynaphthalene-3,6-dicarboxylic acid derivative and a compound having two diazo groups in its molecule, as well as a process for producing the same. The p... | 10/12/1999 |
| 5569749 | Organic photoconductive material and a photosensitive material for electronic photography using it An organic photoconductive material is represented by the following general formula [1]: A1 --N.dbd.N--B--N.dbd.N--A2 [1], wherein B is a divalent organic group bonded to nitrogen atoms forming azo groups, A1 | 10/29/1996 |
| 5506346 | Organic photoconductive material and a photosensitive material for electronic photography using it An organic photoconductive material is represented by the following general formula [1]: A1 -N.dbd.N-B-N.dbd.N-A2 [1], wherein B is a divalent organic group bonded to nitrogen atoms forming azo groups, A1 | 04/09/1996 |
| 5213614 | Ink, ink jet recording process and recording apparatus using the same An ink comprising: water, a water soluble organic solvent, and a colorant represented by the following general formula (I): ##STR1## wherein Q1 is a substituted phenyl group; Q2 is a substituted or unsubstituted p-phenylene or a substituted or unsubs... | 05/25/1993 |
| 5198022 | Waterfast dye and aqueous ink A alkali-soluble dye for a waterfast ink having structural formula as follows: ##STR1## and an ink containing the dye dissolved in water. Printing from the ink is insoluble below pH 6.0; is an intense black at low concentration; and remains blac... | 03/30/1993 |
| 5180817 | Trisazo compounds and use thereof A trisazo compound represented by the following formula in the free acid form: ##STR1## wherein Q1 and Q2 independently of one another are each unsubstituted or substituted phenyl or naphthyl group and l represents 0 or 1, ... | 01/19/1993 |
| 5178671 | Ink, and ink-jet recording method and apparatus employing the ink Provided is an ink comprising a recording agent and a liquid medium for dissolution or dispersion thereof, the recording agent being a compound represented by the general formula ##STR1## where R1 is a radical selected from the group of lo... | 01/12/1993 |
| 5167703 | Ink, ink-jet recording process and instrument making use of the ink Provided is an ink comprising at least water, a water-soluble organic solvent, and a dye, the dye comprising a compound represented by the general formula (I): ##STR1## wherein R1, R2, and R3 are respectively hydrogen... | 12/01/1992 |
| 5127946 | Ink, and ink-jet recording method and apparatus employing the ink Provided is an ink containing a recording agent and a liquid medium for dissolution or dispersion thereof, said ink comprising, as the recording agent, a compound represented by the general formula (A) ##STR1## where n is 0 or 1; R1, R | 07/07/1992 |
| 5049238 | Method of dyeing paper utilizing trisazo dyes A method of dyeing paper utilizing dyes suitable for dyeing paper in blue shades having the formula ##STR1## wherein R is hydrogen, --OH, --OR1 , --NH2, NHR1, --NHCOR1, --NHSO2 R1, --N... | 09/17/1991 |
| 4600674 | Trisazo electrophotographic photoconductive material Disclosed is an electrophotographic photoconductive material excellent in sensitivity and durability which comprises an electroconductive substrate and, provided thereon, a photosensitive layer containing a trisazo pigment represented by the general formu... | 07/15/1986 |
| 4591634 | Trisazo/azoxy dyestuff mixtures Trisazo/azoxy dyestuff mixtures which in the form of free acid correspond to the formula ##STR1## in which R denotes H or optionally substituted alkyl, X and Y denote H, alkyl, alkoxy, halogen, hydroxyl, alkylsulphonyl, optionally mono- or di-alkyl-s... | 05/27/1986 |
| 4529678 | Electrophotographic photoconductor comprising a dithiol derivative An electrophotographic photoconductor is disclosed, which comprises an electroconductive support material and a photosensitive layer comprising at least one 1,3-dithiol derivative of the formula ##STR1## wherein R1 and R2 indepe... | 07/16/1985 |
| 4465627 | Sulfo group-free disazo, trisazo and tetrakisazo compounds containing at lease one basic or cationic group Disazo, trisazo and tetrakisazo compounds of the formula ##STR1## in which each D1 independently is a disazo component of the aniline series or the naphthylamine series; each K1 independently is a coupling and disazo component of the... | 08/14/1984 |
| 4433039 | Trisazo electrophotographic photosensitive material Disclosed is an electrophotographic photosensitive material comprising a photosensitive layer containing a tris-azo pigment represented by the following formula: ##STR1## wherein the ring A1 and A2 may have a halogen atom, an al... | 02/21/1984 |
| 4426432 | Electrophotosensitive receptor with trisazo compound There is disclosed an electrophotosensitive receptor which comprises a conductive support and an electrophotosensitive layer which comprises a carrier transporting material and a specified trisazo compound wherein the azo compound is applied as a coating ... | 01/17/1984 |
| 4279981 | Electrophotographic elements containing trisazo compounds The present invention provides trisazo compounds expressed by the general formula I ##STR1## [wherein A represents ##STR2## (wherein R represents hydrogen, alkyl radical, alkoxy radical, nitro radical, dialkylamino radical or halogen, and n... | 07/21/1981 |
| 4265813 | Azo dyestuffs Azo dyestuffs which, in the form of the free acid, correspond to the formula ##STR1## wherein R1 denotes hydrogen, methyl or chlorine, R2 denotes hydrogen, chlorine, acetylamino, methoxy, ethoxy, nitro or carboxyl, R3... | 05/05/1981 |
| 4051123 | Sulfonic-acid-group containing disazo dyestuffs In a first main aspect azo dyestuffs of the formula ##STR1## wherein A, B, X and Y are certain substituents, in a second main aspect azo dyestuffs of the formula ##STR2## wherein B' represents certain substituents and in a third main aspect azo ... | 09/27/1977 |
| 3998805 | Sulphatoethylene (sulphonyl or sulphonylamino) phenyleneazo dyestuffs Dyestuffs of the formula ##STR1## wherein B is the radical of a coupling component of the dispersion series, which is derived from an N-alkylated aniline or aminonaphthalene, and which contains in the o-position with respect to the azo bridge a free ... | 12/21/1976 |
| 3987024 | Bis- and trisazo sequential free radical initiators used in preparing block and graft copolymers Polyazo compounds containing at least one alkyl or aryl thia or oxa group alpha to at least one of the azo groups in the connecting chain between the azo groups, such as 4-t-butylazo-4-methyl-3-thiapentyl 4-t-butylazo-4-cyanovalerate, which are useful for... | 10/19/1976 |
| 3971741 | Water-insoluble polyazo dyestuff comprising two or three identical azo dyestuffs joined to a central nucleus by carboxyl bridges Waterinsoluble polyazo dyestuffs of the formula In which K denotes identical or different radicals of a coupling component, X denotes an aliphatic radical which is free of hydroxyl groups and is optionally interrupted by heteroatoms, or an aromatic-carbocyclic... | 07/27/1976 |
