Patents by Inventor John Zambounis
John Zambounis 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: 6767620Abstract: A coloured porous material comprising in its pores an effectively colouring amount of an organic pigment which is obtainable by fragmenting a meltable or solvent-soluble pigment precursor, and a process for its preparation. The instant coloured porous material powders are used as pigments for high molecular weight organic materials.Type: GrantFiled: July 22, 2002Date of Patent: July 27, 2004Assignee: Ciba Specialty Chemicals CorporationInventors: John Zambounis, Patrick Verhoustraeten, Henri Dubas, Zhimin Hao, Patrice Bujard
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Publication number: 20030012943Abstract: The present invention relates to a colored porous material comprising in its pores an effectively coloring amount of an organic pigment which is obtainable by fragmenting a meltable or solvent-soluble pigment precursor, and to a process for its preparation.Type: ApplicationFiled: July 22, 2002Publication date: January 16, 2003Inventors: John Zambounis, Patrick Verhoustraeten, Henri Dubas, Zhimin Hao, Patrice Bujard
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Patent number: 6359122Abstract: The invention relates to the preparation of pyrocarbonic acid diesters by an improved process and to the novel pyrocarbonic acid diesters prepared according to said process as well as to the use thereof. The core of the invention is a process for the preparation of a pyrocarbonic acid diester of formula (I) wherein R1 and R1′ are each independently of the other branched or straight-chain C1-C24alkyl, C3-C24alkenyl, C3-C24alkynyl, C4-C12cycloalkyl, C4-C12cycloalkenyl or C7-C24aralkyl, each of which is unsubstituted or substituted by one or more than one substituent which is inert under the reaction conditions, by reacting at least one ester carbonate of formula (II) with 40-50 mol % of a sulfochloride of formula (IV) in the presence of 0.Type: GrantFiled: January 23, 2001Date of Patent: March 19, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: John Zambounis, Véronique Hall-Goulle
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Publication number: 20010012559Abstract: The present invention relates to a coloured porous material comprising in its pores an effectively colouring amount of an organic pigment which is obtainable by fragmenting a meltable or solvent-soluble pigment precursor, and to a process for its preparation. The present invention also relates to the use of the instant coloured porous material powders as pigments for high molecular weight organic materials.Type: ApplicationFiled: June 11, 1998Publication date: August 9, 2001Inventors: JOHN ZAMBOUNIS, PATRICK VERHOUSTRAETEN, HENRI DUBAS, ZHIMIN HAO, PATRICE BUJARD
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Patent number: 6222047Abstract: The invention relates to the preparation of pyrocarbonic acid diesters by an improved process and to the novel pyrocarbonic acid diesters prepared according to said process as well as to the use thereof. The core of the invention is a process for the preparation of a pyrocarbonic acid diester of formula (I) wherein R1 and R1′ are each independently of the other branched or straight-chain C1-C24alkyl, C3-C24alkenyl, C3-C24alkynyl, C4-C12cycloalkyl, C4-C12cycloalkenyl or C7-C24aralkyl, each of which is unsubstituted or substituted by one or more than one substituent which is inert under the reaction conditions, by reacting at least one ester carbonate of formula (II) with 40-50 mol % of a sulfochloride of formula (IV) in the presence of 0.Type: GrantFiled: January 13, 1998Date of Patent: April 24, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: John Zambounis, Véronique Hall-Goulle
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Patent number: 5840449Abstract: The present invention provides a process for the preparation of a material comprising a substrate on whose surface there is at least one pigment coating consisting of one or more pigments of the formula (I) or (II) or derivatives thereofA(D.sub.1)(D.sub.2).sub.x (I)Pc (II)in whichA is the radical of a chromophore of the quinacridone, anthraquinone, perylene, indigo, azo, quinophthalone, isoindolinone, isoindoline, dioxazine, phthalocyanine or diketopyrrolopyrrole series which contains nitrogen atoms attached to D.sub.1 and to x D.sub.2, each nitrogen atom present in A being able independently of the others to be attached to 0, 1 or 2 groups D.sub.1 or D.sub.2,D.sub.1 and D.sub.Type: GrantFiled: May 6, 1996Date of Patent: November 24, 1998Assignee: Ciba Specialty Chemicals CorporationInventors: John Zambounis, Manfred Hofmann
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Patent number: 5830267Abstract: The invention relates to the coloration of high molecular weight organic materials in the mass with soluble phthalocyanine precursors of structure ##STR1## or isomers thereof, to the soluble phthalocyanine precursors as such wherein M is Zn, Ti or V or wherein L.sub.1 is morpholino, pyrrolidino or with C.sub.1 -C.sub.12 alkyl substituted piperidino, to compositions containing high molecular weight organic materials and the above soluble phthalocyanine precursors, and to a process for making structured color images and applications thereof.Type: GrantFiled: May 6, 1996Date of Patent: November 3, 1998Assignee: Ciba Specialty Chemicals CorporationInventors: John Zambounis, Heinz Wolleb
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Patent number: 5750758Abstract: This invention is a process for the preparation of a pyrocarbonic acid diester of formula (I) ##STR1## wherein R.sub.1 and R.sub.1 ' are each, independently of the other, an optionally substituted branched or straight-chain C.sub.1 -C.sub.24 alkyl, C.sub.3 -C.sub.24 alkenyl, C.sub.3 -C.sub.24 alkynyl, C.sub.4 -C.sub.12 cycloalkyl, C.sub.4 -C.sub.12 cycloalkenyl or C.sub.7 -C.sub.24 aralkyl,by reacting at least one ester carbonate of formula (II) ##STR2## with 40-50 mol % of a sulfochloride of formula (IV) ##STR3## in the presence of 0.8-5 mol % of a catalyst of formula (V) ##STR4## and with minor amounts of a heterocyclic aromatic amine in a nonpolar inert solvent,in which process the amount of heterocyclic aromatic amine is 1-3 mol % and the reaction is carried out in the temperature range from -10.degree. C. to +25.degree. C., all molar amounts being based on 100 mol % of ester carbonate of formula (II).Type: GrantFiled: July 22, 1996Date of Patent: May 12, 1998Assignee: Ciba Specialty Chemicals CorporationInventors: John Zambounis, Veronique Hall-Goulle
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Patent number: 5725651Abstract: Mono-N-alkyl-quinacridone pigments are disclosed. They exhibit high light fastness, high temperature stability and high migration fastness. Moreover, they show hypsochromic shifts, fluorescence and high photoconductivity. These pigments are suited for coloring high molecular weight organic materials, for use as light emitting materials of organic electroluminescent elements as well as photoreceptors of electrophotography.Type: GrantFiled: March 10, 1997Date of Patent: March 10, 1998Assignee: Ciba Specialty Chemicals CorporationInventors: John Zambounis, Jin Mizuguchi
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Patent number: 5464697Abstract: Compounds of the formula I ##STR1## in which R.sub.1 and R.sub.2 independently of one another are C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.8 cycloalkyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, or phenyl or benzyl which is unsubstituted or substituted by F, Cl, Br, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy or di(C.sub.1 -C.sub.6 alkyl)amino.The compounds are suitable as .pi.-acceptors and electrical semiconductors, and they can be used for antistatic finishing of objects.Type: GrantFiled: March 14, 1995Date of Patent: November 7, 1995Assignee: Ciba-Geigy CorporationInventor: John Zambounis
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Patent number: 5426232Abstract: Compounds of the formula I ##STR1## in which R.sub.1 and R.sub.2 independently of one another are C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.8 cycloalkyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, or phenyl or benzyl which is unsubstituted or substituted by F, Cl, Br, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy or di(C.sub.1 -C.sub.6 alkyl)amino.The compounds are suitable as .pi.-acceptors and electrical semiconductors, and they can be used for antistatic finishing of objects.Type: GrantFiled: November 4, 1993Date of Patent: June 20, 1995Assignee: Ciba-Geigy CorporationInventor: John Zambounis
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Patent number: 5349062Abstract: Compounds of formula I ##STR1## wherein X.sub.1 and X.sub.2 are each independently of the other O, S or Se, and R.sub.1 and R.sub.2 are each independently of the other a monovalent radical of an aliphatic or aromatic hydrocarbon of 1 to 20 carbon atoms which is unsubstituted or substituted by NH.sub.2, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, phenyl or C.sub.3 -C.sub.8 cycloalkyl. The compounds of formula I are able to form electrically conductive charge transfer complexes.Type: GrantFiled: June 28, 1993Date of Patent: September 20, 1994Assignee: Ciba-Geigy CorporationInventor: John Zambounis
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Patent number: 5281730Abstract: Compounds of the formula I ##STR1## in which R.sub.1 and R.sub.2 independently of one another are C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.8 cycloalkyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, or phenyl or benzyl which is unsubstituted or substituted by F, Cl, Br, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy or di(C.sub.1 -C.sub.6 alkyl)amino.The compounds are suitable as .pi.-acceptors and electrical semiconductors, and they can be used for antistatic finishing of objects.Type: GrantFiled: April 15, 1993Date of Patent: January 25, 1994Assignee: Ciba-Geigy CorporationInventor: John Zambounis
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Patent number: 5084567Abstract: Compounds of the formula I ##STR1## in which X.sub.1, X.sub.2 and X.sub.3, independently of one another, are S or Se, R.sub.1 and R.sub.2, independently of one another, are H, linear or branched C.sub.1 -C.sub.18 alkyl-X.sub.4 - or R.sub.1 and R.sub.2 together are ##STR2## in which X.sub.4 is S or Se, z is 0 and n is an integer from 2 to 6 or z is 1 and n is an integer from 1 to 4, R.sub.4 and R.sub.5, independently of one another, are H or C.sub.1 -C.sub.6 alkyl, and R.sub.3 is linear or branched C.sub.1 -C.sub.12 alkyl or phenyl.The compounds can be converted into unsymmetrically substituted chalcogenofulvalenes, from which electrically conducting charge-transfer complex salts can be prepared.Type: GrantFiled: July 6, 1990Date of Patent: January 28, 1992Assignee: Ciba-Geigy CorporationInventors: Carl W. Mayer, John Zambounis