Patents by Inventor Abul Iqbal
Abul Iqbal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7175948Abstract: There are provided a pigment-containing coloring material stably dispersible in a high concentration in various organic solvents, and a process for producing the same. The production process of the coloring material is characterized by comprising the steps of: providing a solution comprising (1) a soluble pigment precursor which is convertible into an insoluble pigment, (2) a solvent capable of dissolving the soluble pigment precursor therein, and (3) a stabilizing agent comprising an organic compound having a structure or a functional group capable of stabilizing the dispersibility of the insolubilized pigment in the solvent; and converting said soluble pigment precursor into an insoluble pigment to obtain the coloring material containing the insolubilized pigment dispersed stably in the solvent.Type: GrantFiled: August 18, 2003Date of Patent: February 13, 2007Assignee: Dai Nippon Printing Co., Ltd.Inventors: Toshio Yoshihara, Kiyoshi Itou, Kazuhiko Nakamura, Minoru Furukawa, Abul Iqbal, Zhimin Hao
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Patent number: 7060843Abstract: Electroluminescent device comprising in this order (a) an anode (b) a hole transporting layer (c) a light-emitting layer (d) optionally an electron transporting layer and (e) a cathode and a light-emitting substance, wherein the light-emitting substance is a diketopyrrolopyrrole represented by formula I or formula III processes for the preparation of compounds I, its uses and compositions comprising the compounds I and/or III.Type: GrantFiled: September 8, 2000Date of Patent: June 13, 2006Assignee: Ciba Specialty Chemicals CorporationInventors: Junji Otani, Hiroshi Yamamoto, Norihisa Dan, Abul Iqbal, Robert Moretti
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Patent number: 7041235Abstract: The present invention relates to fluorescent diketopyrrolopyrrole analogues of the general formula (I), wherein A1 and A2 are C1–C18alkyl, C2–C18alkenyl, C2–C18alkynyl, C5–C8cycloalkyl, C5–C8cycloalkenyl, aryl or heteroaryl, A3 and A4 are independently of each other C1–C18alkyl, Ar3, —CR30R31—(CH2)m—Ar3, or Y—R32, wherein R30 and R31 independently of each other stand for hydrogen or C1–C4alkyl, or phenyl which can be substituted up to three times with C1–C3alkyl, Ar3 stands for aryl, in particular phenyl or 1- or 2-naphthyl, C5–C8cycloalkyl, in particular cyclohexyl, or heteroaryl, which can be substituted one to three times with C1–C8alkyl, C1–C8alkoxy, halogen or phenyl, which can be substituted with C1–C8alkyl or C1–C8alkoxy one to three times, and m stands for 0, 1, 2, 3 or 4, Y is C(O)— or SO2— and R32 is C1–C18alkyl, Ar3, or aralkyl and A3 can additionally be hydrogen, C1–C8alkyloxycarbonyl, such as tertbutoxycarbonyl, or aralkyloxycarbonyl, such as benzyloxycarbonyl, a process for their preparation andType: GrantFiled: August 1, 2002Date of Patent: May 9, 2006Assignee: Ciba Specialty Chemicals CorporationInventors: Colin Morton, David Macdonald Smith, Abul Iqbal
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Patent number: 7001677Abstract: Electroluminescent device comprising in this order (a) an anode (b) a hole transporting layer (c) a light-emitting layer (d) optionally an electron transporting layer and (e) a cathode and a light-emitting substance, wherein the light-emitting substance is a diketopyrrolopyrrole represented by formula I or formula III processes for the preparation of compounds I, its uses and compositions comprising the compounds I and/or III.Type: GrantFiled: April 29, 2003Date of Patent: February 21, 2006Assignee: Ciba Specialty Chemicals CorporationInventors: Junji Otani, Hiroshi Yamamoto, Norihisa Dan, Abul Iqbal, Robert Moretti
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Publication number: 20040050294Abstract: There are provided a pigment-containing coloring material stably dispersible in a high concentration in various organic solvents, and a process for producing the same. The production process of the coloring material is characterized by comprising the steps of: providing a solution comprising (1) a soluble pigment precursor which is convertible into an insoluble pigment, (2) a solvent capable of dissolving the soluble pigment precursor therein, and (3) a stabilizing agent comprising an organic compound having a structure or a functional group capable of stabilizing the dispersibility of the insolubilized pigment in the solvent; and converting said soluble pigment precursor into an insoluble pigment to obtain the coloring material containing the insolubilized pigment dispersed stably in the solvent.Type: ApplicationFiled: August 18, 2003Publication date: March 18, 2004Applicant: Dai Nippon Printing Co., Ltd.Inventors: Toshio Yoshihara, Kiyoshi Itou, Kazuhiko Nakamura, Minoru Furukawa, Abul Iqbal, Zhimin Hao
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Publication number: 20040009368Abstract: Electroluminescent device comprising in this orderType: ApplicationFiled: April 29, 2003Publication date: January 15, 2004Inventors: Junji Otani, Hiroshi Yamamoto, Norihisa Dan, Abul Iqbal, Robert Moretti
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Patent number: 6656985Abstract: There are provided a pigment-containing coloring material stably dispersible in a high concentration in various organic solvents, and a process for producing the same. The production process of the coloring material is characterized by comprising the steps of: providing a solution comprising (1) a soluble pigment precursor which is convertible into an insoluble pigment, (2) a solvent capable of dissolving the soluble pigment precursor therein, and (3) a stabilizing agent comprising an organic compound having a structure or a functional group capable of stabilizing the dispersibility of the insolubilized pigment in the solvent; and converting said soluble pigment precursor into an insoluble pigment to obtain the coloring material containing the insolubilized pigment dispersed stably in the solvent.Type: GrantFiled: August 17, 2000Date of Patent: December 2, 2003Assignee: Dai Nippon Printing Co., Ltd.Inventors: Toshio Yoshihara, Kiyoshi Itou, Kazuhiko Nakamura, Minoru Furukawa, Abul Iqbal, Zhimin Hao
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Patent number: 6486332Abstract: Compounds of formula A(B)x, (I) wherein x is an integer from 1 to 4, A is the radical of a chromophore of the quinacridone, anthraquinone, perylene, indigo, quinophthalone, isoindolinone, isoindoline, dioxazine, phthalocyanine or azo series, which radical contains x N-atoms attached to B, preferably with at least one directly adjacent or conjugated carbonyl group, B is a group of formula and, if x is 2, 3 or 4, may also be one, two or three hydrogen atoms. The symbols Q, R1, R2, R3, R4, X, Y, Z, m and n, are as defined in claim 1. These carbamate group-containing soluble chromophores are distinguished by outstanding solid state fluorescence in the UV range as well as the by ease with which they can be converted to the corresponding pigments in the substrate in which they are incorporated.Type: GrantFiled: February 6, 2001Date of Patent: November 26, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Zhimin Hao, John S. Zambounis, Abul Iqbal
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Publication number: 20010039358Abstract: Compounds of formulaType: ApplicationFiled: February 6, 2001Publication date: November 8, 2001Inventors: Zhimin Hao, John S. Zambounis, Abul Iqbal
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Patent number: 6274065Abstract: Preparation of a solid fluorescent composition comprising (1) mixing a host chromophore and an effective amount of a pigment precursor in a solvent, then generating a pigment as guest chromophore in-situ from the pigment precursor, and, subsequently, isolating the mixture of the host and guest chromophores, thereby forming a solid solution, or (2) mixing a polymer as a matrix or a polymer precursor and a pigment precursor in a solvent, if desired in the presence of a chromophore being a host component, then generating a pigment in-situ from the pigment precursor (being the guest component if a host component is present), and, subsequently, isolating the mixture of polymer and pigment, and—if present—the host component, thereby forming a solid solution, wherein in all cases where there is a host component, the absorption spectrum of the pigment (guest chromophore) overlaps with the fluorescence emission spectrum of the host chromophore.Type: GrantFiled: February 3, 1998Date of Patent: August 14, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Takashi Deno, Kunihiko Kodama, Abul Iqbal, Brian Gerrard Devlin
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Patent number: 6271401Abstract: Compounds of formula A(B)x, (I), wherein x is an integer from 1 to 4, A is the radical of a chromophore of the quinacridone, anthraquinone, perylene, indigo, quinophthalone, isoindolinone, isoindoline, dioxazine, phthalocyanine or azo series, which radical contains x N-atoms attached to B, preferably with at least one directly adjacent or conjugated carbonyl group, B is a group of formula and, if x is 2, 3 or 4, may also be one, two or three hydrogen atoms. The symbols Q, R1, R2, R3, R4, X, Y, Z, m and n, are as defined in claim 1. These carbamate group-containing soluble chromophores are distinguished by outstanding solid state fluorescence in the UV range as well as the by ease with which they can be converted to the corresponding pigments in the substrate in which they are incorporated.Type: GrantFiled: July 9, 1996Date of Patent: August 7, 2001Assignee: Ciba Specialty Chemicals Corp.Inventors: Zhimin Hao, John S. Zambounis, Abul Iqbal
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Patent number: 6261359Abstract: Compounds of formula A(B)x, (I), wherein x is an integer from 1 to 4, A is the radical of a chromophore of the quinacridone, anthraquinone, perylene, indigo, quinophthalone, isoindolinone, isoindoline, dioxazine, phthalocyanine or azo series, which radical contains x N-atoms attached to B, preferably with at least one directly adjacent or conjugated carbonyl group, B is a group of formula and, if x is 2, 3 or 4, may also be one, two or three hydrogen atoms. The symbols Q, R1, R2, R3, R4, X, Y, Z, m and n, are as defined in claim 1.Type: GrantFiled: June 11, 1998Date of Patent: July 17, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Zhimin Hao, John S. Zambounis, Abul Iqbal
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Patent number: 6248165Abstract: Ternary solid solutions useful as pigments are disclosed. The ternary solid solutions result from incorporating a third component, which is a diketopyrrolopyrrole or quinacridone pigment, into the crystal lattice of the mixed crystal formed from equimolar amounts of two different diketopyrrolopyrrole pigments.Type: GrantFiled: February 9, 2000Date of Patent: June 19, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Shivakumar Basalingappa Hendi, Fridolin Bäbler, Zhimin Hao, Abul Iqbal
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Patent number: 6180315Abstract: Novel compositions for making structured color images and application thereof Compositions for making structured color images comprising (a) a soluble pigment precursor which can be transformed to an insoluble pigment by means of chemical, thermal, photolytic or radiation-induced method, and (b) a binder polymer or prepolymer, or a positive or negative resist-type resin which can be structured by crosslinking, polymerization or depolymerization by applying heat or electromagnetic irradiation. The compositions can be applied to optical and thermal recording, printing, and the production of color filters for Liquid Crystal Displays, with high accuracy, high transparency and high stability.Type: GrantFiled: December 10, 1999Date of Patent: January 30, 2001Assignee: Ciba Specialty Chemcials CorporationInventors: Ulrich Sch{umlaut over (a)}deli, John S. Zambounis, Abul Iqbal, Zhimin Hao, Henri Dubas
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Patent number: 6160037Abstract: Pigment composition obtainable by(a) mixing a latent pigment with a polymerizable substance, and(b) treating the mixture of step (a) with heat while mixing the reaction mixture, and(c) cooling the treated reaction mixture to room temperature, and, if desired, working up the obtained pigment composition, a process for its preparations, its use and compositions comprising it.Type: GrantFiled: July 8, 1998Date of Patent: December 12, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Johannes Leugs, Zhimin Hao, Abul Iqbal
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Patent number: 6146809Abstract: Composition comprising a solid organic support material to which either directly or via a bridging group, are covalently linked fluorescent host chromophores and fluorescent guest chromophores, wherein the fluorescence emission spectrum of the host chromophore overlaps with the absorption spectrum of the guest chromophore, wherein the host chromophore is selected from the group consisting of benzo[4,5]imidazo[2,11-a]isoindol-11-ones.Type: GrantFiled: February 3, 1998Date of Patent: November 14, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Brian Gerrard Devlin, Junji Otani, Kazuhiko Kunimoto, Abul Iqbal, Sameer Hosam Eldin
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Patent number: 6127549Abstract: Compounds of formula:A(B).sub.x, (I),wherein x is an integer from 1 to 4,A is the radical of a chromophore of the quinacridone, anthraquinone, perylene, indigo, quinophthalone, isoindolinone, isoindoline, dioxazine, phthalocyanine or azo series, which radical contains x N-atoms attached to B, preferably with at least one directly adjacent or conjugated carbonyl group,B is a group of formula: ##STR1## and, if x is 2, 3 or 4, may also be one, two or three hydrogen atoms. The symbols Q, R.sub.1, R.sub.2, R.sub.3, R.sub.4, X, Y, Z, m und n, are as defined in claim 1.These carbamate group-containing soluble chromophores are distinguished by outstanding solid state fluorescence in the UV range as well as the by ease with which they can be converted to the corresponding pigments in the substrate in which they are incorporated.Type: GrantFiled: June 2, 1998Date of Patent: October 3, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Zhimin Hao, John S. Zambounis, Abul Iqbal
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Patent number: 6120944Abstract: The invention relates to a color-pigmented high molecular weight organic material structured from a radiation-sensitive precursor by irradiation, the pigmentation of which material consists of extremely fine particles, at least 80 mol % of the pigmentation consisting of a pigment of the class diketopyrrolopyrrole, dioxazine, isoindoline, isoindolinone, disazo condensation yellow or benzimidazolonazo, each containing at least one --NHCO-- group, and, where appropriate, a second pigment of the class diketopyrrolopyrrole, dioxazine, isoindoline, isoindolinone, benzimidazolonazo, disazo or phthalocyanine, and, when the structure of the main pigment is point-symmetrical, the two pigments being present in a balanced molar ratio of from 1:1 to 7:3. Those materials are used preferably in the form of thin layers which are built up in patterns in one or more layers on a transparent substrate and can be used, for example, as optical color filters.Type: GrantFiled: April 8, 1998Date of Patent: September 19, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Ulrich Schadeli, Eric Tinguely, Veronique Hall-Goulle, Heinz Wolleb, Zhimin Hao, Abul Iqbal
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Patent number: 6080516Abstract: Solid-state fluorescent composition comprising at least one host chromophore selected from the group consisting of a benzo[4,5] imidazo[2,1-a]isoindol-11-ones and an effective amount of at least one guest chromophore, and if desired a polymer C, wherein the emission spectrum of the host chromophore overlaps with the absorption spectrum of the guest chromophore, and wherein (a1) the host chromophore is covalently linked to a polymer backbone A ("host polymer"), and/or (a2) the guest chromophore is covalently linked to a polymer backbone B ("guest polymer").Type: GrantFiled: February 3, 1998Date of Patent: June 27, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Brian Gerrard Devlin, Junji Otani, Kazuhiko Kunimoto, Takashi Deno, Abul Iqbal, Sameer Hosam Eldin
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Patent number: 6048918Abstract: 1,4-Diketopyrrolopyrroles of the formula ##STR1## in which A and B independently of one another are a group of the formula ##STR2## R.sub.1 is a long-chain radical containing a reactive group capable of polymerization, andR.sub.2 is C.sub.1 -C.sub.6 alkyl, ##STR3## or R.sub.1. For the definition of the radicals R.sub.3 -R.sub.9, refer to claim 1.The novel diketopyrrolopyrroles are suitable for preparing colored polymers with unexpectedly advantageous color effects.Type: GrantFiled: September 3, 1998Date of Patent: April 11, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Sameer Hosam Eldin, Abul Iqbal