Patents by Inventor George Kvakovszky
George Kvakovszky 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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Publication number: 20090005601Abstract: The disclosed process relates to the removal of malodorous compounds from dimethyl sulfoxide.Type: ApplicationFiled: September 17, 2007Publication date: January 1, 2009Inventors: George Kvakovszky, David Villarrubia, II, Scott Stevenson, Charles G. Ashe
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Patent number: 6673157Abstract: The invention relates to a method for stripping paint from surfaces, comprising: a) contacting a painted surface with a paint stripping composition, and b) separating at least some of the paint contacted with the paint stripping composition from the painted surface; c) wherein the paint stripping composition comprises: i) from about 60 to about 99% by volume of one or more environmentally acceptable esters selected from the group consisting of t-butyl acetate, a carboxylic acid methyl ester having a caboxylate residue of at least three carbon atoms, an ester of lactic acid, an ester of oxalic acid having two alkoxy residues wherein each alkoxy residue has at least three carbon atoms, diethyl tartrate, triethyl citrate, tributyl citrate, and one or more sugar esters; and ii) dimethyl sulfoxide which is present in an amount from about 1 to about 40% by volume of the composition.Type: GrantFiled: February 24, 2000Date of Patent: January 6, 2004Assignee: Gaylord Chemical CorporationInventors: Artie S. McKim, George Kvakovszky, James E. Schmidheiser
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Patent number: 6670033Abstract: A process for the formation of a purified anhydrosugar alcohol is disclosed, whereby the resultant purified anhydrosugar alcohol has a purity of at least 99.8% and is substantially colorless. The anhydrosugar alcohol is purified by distillation, recrystallization from methanol, ethanol or ethylene glycol, melt recrystallization, or a combination thereof. Preferably, the purification is by distillation followed by recrystallization from methanol, ethanol or ethylene glycol. A test for determining the purity of the anhydrosugar alcohol is disclosed, wherein the color of the anhydrosugar alcohol after annealing at a temperature of at least 260° C. for at least four hours is examined. Alternatively, purity can be determined by examination of ultraviolet (UV) transmittance of the purified anhydrosugar alcohol at various wavelengths.Type: GrantFiled: November 27, 2001Date of Patent: December 30, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Michael A. Hubbard, Michael Wohlers, Helmut B. Witteler, Edward G. Zey, George Kvakovszky, Thomas H. Shockley, Larry F. Charbonneau, Norbert Kohle, Jochen Rieth
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Patent number: 6660899Abstract: The invention relates to a distillation process composition at least partially separating mixtures of aromatic and non-aromatic hydrocarbon compounds employing an extractive distillation composition comprising: a. at least one organic sulfoxide of the formula R1—SO—R2, and b. at least one acrylic sulfone of the formula R3—SO2—R4 wherein R1, R2, R3, and R4 have at least one carbon atom and can be the same or different, and wherein the at least one organic sulfoxide is present in an amount effective to provide improved separation of the aromatic and non-aromatic hydrocarbon compounds, as compared to a process employing the same extractive distillation composition not comprising the organic sulfoxide.Type: GrantFiled: February 14, 2001Date of Patent: December 9, 2003Assignee: Gaylord Chemical CorporationInventors: Artie S. McKim, George Kvakovszky, Michael D. Donahue
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Patent number: 6639067Abstract: A process is described for continuous production of anhydrosugar alcohol by continuous introducing of sugar alcohols and/or monoanhydrosugar alcohols into a reaction vessel and dehydration in the presence of an acid catalyst and solvent in which the resultant reaction product is soluble. Water and the solvent having the dissolved reaction product are each cointinuously removed from the reaction vessel. The reaction product is separated from the removed solvent and the product is optionally purified to a purity of 99.0% the solvent is recycled in the reaction vessel.Type: GrantFiled: September 27, 2001Date of Patent: October 28, 2003Inventors: Willard C. Brinegar, Michael Wohlers, Michael A. Hubbard, Edward G. Zey, George Kvakovszky, Thomas H. Shockley, Rainer Roesky, Uwe Dingerdissen, Werner Kind
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Patent number: 6617483Abstract: The invention relates to extractive distillation compositions for separating a mixture of hydrocarbon compounds, wherein the extractive distillation composition includes at least one alkylene glycol compound, and at least one compatibility agent, wherein the compatibility agent is selected from materials having polar parameters and hydrogen bonding parameters such that the extractive distillation composition provides improved separation of the hydrocarbon compounds, as compared to the use of the extractive distillation composition without the compatibility agent.Type: GrantFiled: May 3, 2000Date of Patent: September 9, 2003Assignee: Gaylord Chemical CorporationInventors: Artie S. McKim, George Kvakovszky, Michael D. Donahue, Chris B. Watts
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Patent number: 6555726Abstract: The invention relates to methods for enhanced extractive distillation of hydrocarbons that employ extrative distillation compositions comprising sulfolane or sulfolane derivatives in comination with compatibility agents.Type: GrantFiled: November 10, 1999Date of Patent: April 29, 2003Assignee: Gaylord Chemical CorporationInventors: Artie S. McKim, George Kvakovszky, Michael D. Donahue
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Publication number: 20030045766Abstract: The invention relates to an extractive distillation composition for at least partially separating a mixture of hydrocarbon compounds comprising:Type: ApplicationFiled: February 14, 2001Publication date: March 6, 2003Inventors: Artie S. McKim, George Kvakovszky, Michael D. Donahue
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Patent number: 5773591Abstract: A novel process for preparing sulfonic acid esters and amides of benzo-heterocyclic diazo diketo compounds, such as substituted diazo-4-oxo-3,4-dihydrocoumarins, which are useful synthetic intermediates in a wide variety of applications including photoresists, opto-electronics, agricultural, and pharmaceutical applications is disclosed and claimed. The process comprises the steps of (a) subjecting a substituted benzo-heterocyclic .beta.-keto-enol compound to suitable diazo transfer conditions in the presence of a diazo transfer agent; (b) subjecting the so formed diazo diketo compound to suitable halosulfonation conditions in the presence of a halosulfonation agent; and (c) subjecting the so formed halosulfonyl aromatic compound to suitable substitution reaction in the presence of an alcohol or an amine to form the corresponding sulfonic acid ester or amide of benzo-heterocyclic diazo diketo compound.Type: GrantFiled: March 7, 1997Date of Patent: June 30, 1998Assignee: Hoechst Celanese Corp.Inventors: Mohammad Aslam, Michael T. Sheehan, George Kvakovszky
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Patent number: 5739295Abstract: A new class of 3-diazo-3,4-dihydrocoumarin compounds which are useful as photoactive compounds in a wide variety of applications including photoresists and other opto-electronic applications are disclosed and claimed. Preferred embodiments include 6-sulfonyl-3-diazo-4-oxo-3,4-dihydrocoumarin esters. These compounds exhibit very high photosensitivity in the deep ultraviolet (DUV) region (ca. 250 nm), and therefore, are useful as photoactive compounds in DUV photoresist formulations.Type: GrantFiled: March 7, 1997Date of Patent: April 14, 1998Assignee: Hoechst Celanese CorporationInventors: Mohammad Aslam, Michael T. Sheehan, George Kvakovszky, Kenneth G. Davenport, Douglas J. Gordon
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Patent number: 5466873Abstract: Arylketoamines are prepared by reacting arylisonitrosoalkanones with hydrogen in the presence of a transition metal catalyst and a liquid carboxylic acid at a temperature of less than about 600.degree. C.Type: GrantFiled: November 30, 1994Date of Patent: November 14, 1995Assignee: Hoechst Celanese CorporationInventors: Ahmed M. Tafesh, George Kvakovszky, Charlet R. Lindley
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Patent number: 5464941Abstract: The present invention provides novel substituted biphenyl pyrazines or pyrazine derivatives ("BPD") which are functional and have useful application as a monomer for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, polyetherketones, epoxides, polyimides, polyamides, and polyamides-imides; and as pigments for coating compositions such as paints.Type: GrantFiled: October 19, 1994Date of Patent: November 7, 1995Assignee: Hoechst Celanese CorporationInventors: Richard Vicari, George Kvakovszky, Olan S. Fruchey, Hans J. Metz
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Patent number: 5464923Abstract: The present invention provides novel substituted biphenyl pyrazines or pyrazine derivatives ("BPD") which are functional and have useful application as a monomer for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, polyetherketones, epoxides, polyimides, polyamides, and polyamides-imides; and as pigments for coating compositions such as paints. These BPD have the general formula: ##STR1## wherein R.sub.1 -R.sub.8 and n are defined herein.Type: GrantFiled: October 19, 1994Date of Patent: November 7, 1995Assignee: Hoechst Celanese CorporationInventors: Richard Vicari, George Kvakovszky, Olan S. Fruchey
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Patent number: 5459266Abstract: The present invention provides novel substituted pyrazines or pyrazine derivatives ("NPD") which are functional and have useful application as a monomer for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, polyetherketones, epoxides, polyimides, polyamides, and polyamides-imides. These NPD have the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are defined herein.Type: GrantFiled: February 4, 1994Date of Patent: October 17, 1995Assignee: Hoechst Celanese CorporationInventors: George Kvakovszky, Richard Vicari, Ahamed M. Tafesh, Kathleen N. Juneau, Olan S. Fruchey, Joseph A. McDonough, Debasish Kuila
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Patent number: 5457231Abstract: Arylketoamines are prepared by reacting arylisonitrosoalkanones with hydrogen in the presence of a transition metal catalyst and a liquid carboxylic acid at a temperature of less than about 60.degree. C.Type: GrantFiled: August 23, 1994Date of Patent: October 10, 1995Assignee: Hoechst Celanese CorporationInventors: Ahmed M. Tafesh, George Kvakovszky, Charlet R. Lindley
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Patent number: 5438142Abstract: Compounds useful as polymer stabilizers which are polymerizable into condensation polymer systems are disclosed and claimed. A particularly preferred embodiment is 1-(3'-(benzotriazol-2"-yl)-4'-hydroxyphenyl)-1,1-bis(4-hydroxyphenyl)ethan e.Type: GrantFiled: August 10, 1993Date of Patent: August 1, 1995Assignee: Hoechst Celanese Corp.Inventors: John R. Fritsch, Olan S. Fruchey, Debasish Kuila, George Kvakovszky, Mark A. Murphy, Michael T. Sheehan, James R Sounik, Richard Vicari
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Patent number: 5430123Abstract: The present invention provides new polymer compositions which contain novel substituted pyrazines or pyrazine derivatives ("NPD") which are functional and have useful application as a monomer (co-monomer) for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, polyetherketones, epoxides, polyimides, polyamides, and polyamides-imides. These NPD have the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are defined herein.Type: GrantFiled: November 1, 1994Date of Patent: July 4, 1995Assignee: Hoechst Celanese CorporationInventors: George Kvakovszky, Richard Vicari, Olan S. Fruchey, Ahmed M. Tafesh, Charles B. Hilton
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Patent number: 5399764Abstract: Arylketoamines are prepared by reacting arylisonitrosoalkanones with hydrogen in the presence of a transition metal catalyst and a liquid carboxylic acid at a temperature of less than about 60.degree. C.Type: GrantFiled: May 20, 1994Date of Patent: March 21, 1995Assignee: Hoechst Celanese CorporationInventors: Ahmed M. Tafesh, George Kvakovszky, Charlet R. Lindley
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Patent number: 5393860Abstract: The present invention provides new polymer compositions which contain novel substituted pyrazines or pyrazine derivatives ("NPD") which are functional and have useful application as a monomer (co-monomer) for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, polyetherketones, epoxides, polyimides, polyamides, and polyamides-imides. These NPD have the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are defined herein.Type: GrantFiled: February 4, 1994Date of Patent: February 28, 1995Assignee: Hoechst Celanese CorporationInventors: George Kvakovszky, Richard Vicari, Olan S. Fruchey, Ahmed M. Tafesh, Charles B. Hilton
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Patent number: 5349090Abstract: Arylketoamines are prepared by reacting arylisonitrosoalkanones with hydrogen in the presence of a transition metal catalyst and a liquid carboxylic acid at a temperature of less than about 60.degree. C.Type: GrantFiled: February 4, 1994Date of Patent: September 20, 1994Assignee: Hoechst Celanese CorporationInventors: Ahmed M. Tafesh, George Kvakovszky, Charlet R. Lindley