Patents by Inventor Alan E. J. Toth
Alan E. J. Toth 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: 20150030974Abstract: Described herein is a photoreceptor having a substrate, a charge generating layer, a charge transport layer comprising N,N,N?N?-tetra(4-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine having a purity of from about 95 percent to about 100 percent, and a protective overcoat layer. The N,N,N?N?-tetra(4-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine has been treated by a purification process two or more times.Type: ApplicationFiled: July 23, 2013Publication date: January 29, 2015Applicant: XEROX CORPORATIONInventors: Gregory M. McGuire, Jennifer A. Coggan, Alan E.J. Toth, Nan-Xing Hu, Yu Liu
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Patent number: 8080351Abstract: Triarylmethane compounds used as antioxidants in overcoat layers to alleviate printing defects and an improved chemical process for the synthesis of these triarylmethane compounds using an acetal derivative of an aldehyde which significantly reduces reaction time and results with the formation of substantially no byproducts.Type: GrantFiled: June 2, 2008Date of Patent: December 20, 2011Assignee: Xerox CorporationInventors: Matthew A. Heuft, Alan E. J. Toth, Nan-Xing Hu, Marko Saban
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Publication number: 20090297960Abstract: Triarylmethane compounds used as antioxidants in overcoat layers to alleviate printing defects and an improved chemical process for the synthesis of these triarylmethane compounds using an acetal derivative of an aldehyde which significantly reduces reaction time and results with the formation of substantially no byproducts.Type: ApplicationFiled: June 2, 2008Publication date: December 3, 2009Applicant: XEROX CORPORATIONInventors: Matthew A. Heuft, Alan E.J. Toth, Nan-Xing Hu, Marko Saban
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Patent number: 7297459Abstract: A process for manufacturing a toner having improved relative humidity sensitivity is described. The process comprises forming polyester toner particles by emulsion/aggratation, fluidizing the toner particles with a stream of inert gas while spraying the toner particles with a solution containing an additive affecting relative humidity sensitivity, and wherein the additive contacts a surface of the toner particles and the additive remains on the surface of the toner particles.Type: GrantFiled: November 1, 2004Date of Patent: November 20, 2007Assignee: Xerox CorporationInventors: Milan Maric, Alan E. J. Toth, Marko D. Saban
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Patent number: 7029817Abstract: A toner process comprising the aggregation and coalescence of a sulfonated polyester and a colorant, and wherein said polyester possesses a degree of sulfonation or a sulfonation percentage of from about 0.5 to about 3 mol percent.Type: GrantFiled: February 13, 2004Date of Patent: April 18, 2006Assignee: Xerox CorporationInventors: Sarah J. P. Robinson, Thomas E. Enright, Alan E. J. Toth, Milan Maric, Michael S. Hawkins, Marko D. Saban, Guerino G. Sacripante, George Liebermann
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Patent number: 6764802Abstract: A process including: agitating a mixture including a liquid and a plurality of resin particles within a vessel at a first shear condition; circulating a portion of the mixture from the vessel through a mixer; adding not all at once an aggregating agent for the resin particles and mixing the aggregating agent with the circulating mixture portion within the mixer at a second shear condition more intensive than the first shear condition to result in a post-mixer circulating composition; and returning the post-mixer circulating composition to the vessel wherein the post-mixer circulating composition undergoes the agitating at the first shear condition.Type: GrantFiled: July 29, 2002Date of Patent: July 20, 2004Assignee: Xerox CorporationInventors: Milan Maric, Alan E. J. Toth, Thomas E. Enright, Marko D. Saban
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Publication number: 20040018441Abstract: A process including:Type: ApplicationFiled: July 29, 2002Publication date: January 29, 2004Applicant: Xerox CorporationInventors: Milan Maric, Alan E.J. Toth, Thomas E. Enright, Marko D. Saban
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Patent number: 6291122Abstract: A branched polyester resin of the Formula wherein n and m represent randomly repeating segments, and the number of n and m segments in the polymer backbone are each of from about 10 to about 10,000; X is an alkylene group, an olefinic group, or an arylene; Y is an organic dioxy group or radical of I, II, or mixtures thereof; Z is an organic trioxy radical of III, IV, or mixtures thereof; and wherein R and R1 is a hydrogen atom or an alkyl group; G is an alkylene or arylene group, and a is 0 or 1.Type: GrantFiled: September 14, 2000Date of Patent: September 18, 2001Assignee: Xerox CorporationInventors: Guerino G. Sacripante, Alan E. J. Toth, Marko D. Saban
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Patent number: 6180747Abstract: A branched polyester resin of the Formula wherein n and m represent randomly repeating segments, and the number of n and m segments in the polymer backbone are each of from about 10 to about 10,000; X is an alkylene group, an olefinic group, or an arylene; Y is an organic dioxy group or radical of I, II, or mixtures thereof; Z is an organic trioxy radical of III, IV, or mixtures thereof; and wherein R and R1 is a hydrogen atom or an alkyl group; G is an alkylene or arylene group, and a is 0 or 1.Type: GrantFiled: February 28, 2000Date of Patent: January 30, 2001Assignee: Xerox CorporationInventors: Guerino G. Sacripante, Alan E. J. Toth, Marko D. Saban
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Patent number: 6127080Abstract: A process for the preparation of an unsaturated polyester which comprises (i) reacting an organic diol with a cyclic akylene carbonate in the presence of a first catalyst to thereby form a polyalkoxy diol, and (ii) optionally adding thereto a further amount of cyclic alkylene carbonate in the presence of a second catalyst, and (iii) subsequently polycondensing the resulting mixture with a dicarboxylic acid.Type: GrantFiled: March 10, 2000Date of Patent: October 3, 2000Assignee: Xerox CorporationInventors: Guerino G. Sacripante, Daniel A. Foucher, J. Stephen Kittelberger, Dongming Li, Marko D. Saban, Alan E. J. Toth, Robert D. Bayley
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Patent number: 6063827Abstract: A process for the preparation of an unsaturated polyester which comprises (i) reacting an organic diol with a cyclic akylene carbonate in the presence of a first catalyst to thereby form a polyalkoxy diol, and (ii) optionally adding thereto a further amount of cyclic alkylene carbonate in the presence of a second catalyst, and (iii) subsequently polycondensing the resulting mixture with a dicarboxylic acid.Type: GrantFiled: July 22, 1998Date of Patent: May 16, 2000Assignee: Xerox CorporationInventors: Guerino G. Sacripante, Daniel A. Foucher, J. Stephen Kittelberger, Dongming Li, Marko D. Saban, Alan E. J. Toth, Robert D. Bayley
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Patent number: 6017671Abstract: A toner composition comprised of a polyester resin with hydrophobic end groups, colorant, optional wax, optional charge additive, and optional surface additives.Type: GrantFiled: May 24, 1999Date of Patent: January 25, 2000Assignee: Xerox CorporationInventors: Guerino G. Sacripante, Marko D. Saban, Alan E. J. Toth, Michael L. Grande, J. Stephen Kittelberger
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Patent number: 5370955Abstract: A process for the preparation of aryl amine polycondensation polymers comprising the interfacial polymerization of an aryl amine diol dissolved in an alkaline aqueous phase, to which has been added a water miscible organic solvent, with a bifunctional acid halide dissolved in a water immiscible organic solvent, and wherein said polymers possess a high molecular weight of from between about 50,000 to about 350,000, and narrow molecular weight distribution M.sub.w /M.sub.n of from about 1 to about 4.Type: GrantFiled: September 27, 1993Date of Patent: December 6, 1994Assignee: Xerox CorporationInventors: Alan E. J. Toth, Walter Mychajlowskij, Dale S. Renfer
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Patent number: 5342719Abstract: An electrophotographic imaging member including a charge generating layer, a charge transport layer with charge transport molecules and as sensitizing additive or dopant a hydroxy derivative of the transport molecule.Type: GrantFiled: March 1, 1993Date of Patent: August 30, 1994Assignee: Xerox CorporationInventors: Damodar M. Pai, John F. Yanus, Paul J. DeFeo, Alan E. J. Toth, Walter Mychajlowskij, Zoran Popovic
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Patent number: 4771133Abstract: A process is described for preparing vanadyl phthalocyanine for electrophotographic devices comprising reacting vanadium pentoxide and phthalonitile to form vanadyl phthalocyanine pigment and other reaction products, separating crude vanadyl phthalocyanine pigment from the other reaction products, washing the crude vanadyl phthalocyanine pigment, drying the crude vanadyl phthalocyanine pigment, mixing the crude vanadyl phthalocyanine pigment with a solution of between about 60 percent and about 80 percent by weight of H.sub.2 SO.sub.4 to form a H.sub.2 SO.sub.4 -vanadyl phthalocyanine pigment mixture, diluting the H.sub.2 SO.sub.Type: GrantFiled: February 26, 1987Date of Patent: September 13, 1988Assignee: Xerox CorporationInventors: George Liebermann, Ah-Mee Hor, Alan E. J. Toth