Patents by Inventor Walter Mychajlowskij
Walter Mychajlowskij 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: 8313880Abstract: The present disclosure relates to a magenta toner formulation that may be used in a toner printer cartridge for an electrophotographic printer. The magenta toner may include polymer resin binder containing three polymer resins with different number average molecular weight values. The concentration of such polymer resins may be selected to provide a desired temperature versus viscosity behavior for the magenta toner that may be configured to conform to the viscosity versus temperature provide for yellow, cyan and black toner.Type: GrantFiled: August 13, 2009Date of Patent: November 20, 2012Assignee: Lexmark International, Inc.Inventors: Danielle Renee Ashley, James Robert Combes, John Joseph Earley, Lale Gokbudak Lovell, George Pharris Marshall, Walter Mychajlowskij
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Publication number: 20110039198Abstract: The present disclosure relates to a magenta toner formulation that may be used in a toner printer cartridge for an electrophotographic printer. The magenta toner may include polymer resin binder containing three polymer resins with different number average molecular weight values. The concentration of such polymer resins may be selected to provide a desired temperature versus viscosity behavior for the magenta toner that may be configured to conform to the viscosity versus temperature provide for yellow, cyan and black toner.Type: ApplicationFiled: August 13, 2009Publication date: February 17, 2011Inventors: Danielle Renee Ashley, James Robert Combes, John Joseph Earley, Lale Gokbudak Lovell, George Pharris Marshall, Walter Mychajlowskij
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Publication number: 20080299476Abstract: The present disclosure relates to a method of forming a toner composition, and to a toner composition, that has a controlled particle size distribution, wherein the particle size distribution may be controlled by adjusting the concentration of a charge control additive in a chemical process of toner manufacture. The toner may therefore have a controlled amount of toner particles having diameters of less than or equal to about 4.0 microns. The toner may therefore provide improved resistance to filming on a given printer component.Type: ApplicationFiled: June 4, 2007Publication date: December 4, 2008Inventors: Danielle Renee Ashley, James Robert Combes, John Joseph Earley, Lale Gokbudak Lovell, George Pharris Marshall, Walter Mychajlowskij, Tao Yu
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Publication number: 20080227020Abstract: The present disclosure relates to chemically processed toner, wherein fuser release agent (wax) may be dispersed in a fluid containing a dispersant. Introduced to the wax dispersion are one or more polymerizable monomers which may be polymerized to form a latex of polymer particles. The polymer particles may then serve as a binder for the formation of toner for use in an electrophotographic printer. The polymerizable monomers may utilize acrylic esters that include relatively long chain hydrocarbon type substitution.Type: ApplicationFiled: March 14, 2007Publication date: September 18, 2008Inventors: Rick Owen Jones, Lale Gokbudak Lovell, Walter Mychajlowskij, John Melvin Olson, Kasturi Rangan Srinivasan
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Patent number: 6673505Abstract: A process for the preparation of a toner by mixing a colorant, a latex, optionally a wax and a polyamine salt coagulant to form toner size aggregates, wherein the polyamine salt is then neutralized or converted to an amide or hydrolyzed to an acid by the introduction of a base followed by a pH reduction with an acid to enable rapid coalescence or fusion of the aggregates.Type: GrantFiled: March 25, 2002Date of Patent: January 6, 2004Assignee: Xerox CorporationInventors: Lu Jiang, Armin R. Volkel, Chieh-Min Cheng, Michael A. Hopper, Walter Mychajlowskij, Raj D. Patel
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Publication number: 20030180652Abstract: A process for the preparation of a toner by mixing a colorant, a latex, optionally a wax and a polyamine salt coagulant to form toner size aggregates, wherein the polyamine salt is then neutralized or converted to an amide or hydrolyzed to an acid by the introduction of a base followed by a pH reduction with an acid to enable rapid coalescence or fusion of the aggregates.Type: ApplicationFiled: March 25, 2002Publication date: September 25, 2003Applicant: Xerox CorporationInventors: Lu Jiang, Armin R. Volkel, Chieh-Min Cheng, Michael A. Hopper, Walter Mychajlowskij, Raj D. Patel
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Patent number: 6582873Abstract: A toner process including, for example, mixing a latex with a colorant wherein the latex contains resin and an ionic surfactant, and the colorant contains a surfactant and a colorant; adding a polyaluminum chloride; affecting aggregation by heating; adding a chelating component and a base wherein the base increases the pH of the formed aggregates; heating the resulting mixture to accomplish coalescence; and isolating the toner.Type: GrantFiled: June 5, 2002Date of Patent: June 24, 2003Assignee: Xerox CorporationInventors: Lu Jiang, Nan-Xing Hu, Raj D. Patel, Walter Mychajlowskij, Michael A. Hopper
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Patent number: 6541175Abstract: A process involving, for example, providing or generating an emulsion latex comprised of sodio sulfonated polyester resin particles by adding with shearing to the latex a colorant dispersion comprising from about 20 to about 50 percent of a predispersed colorant in water, followed by the addition of an organic or an inorganic acid; heating the resulting mixture at a temperature of from about 45° C. to about 65° C. followed by the addition of an water insoluble metal salt or water insoluble metal oxide thereby releasing metal ions and permitting aggregation and coalescence, resulting in toner particles; and optionally cooling the mixture and isolating the product.Type: GrantFiled: February 4, 2002Date of Patent: April 1, 2003Assignee: Xerox CorporationInventors: Lu Jiang, Walter Mychajlowskij, Guerino G. Sacripante, Raj D. Patel, Michael A. Hopper
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Publication number: 20030018100Abstract: An ink composition containing a vehicle, a colorant and an alkali sulfonated polyester-amine resin composition generated, for example, from the reaction of an organic diol, an organic diacid, an alkali sulfonated diacid and an amino-organic diacid.Type: ApplicationFiled: April 19, 2001Publication date: January 23, 2003Applicant: Xerox Corporation.Inventors: Daniel A. Foucher, Walter Mychajlowskij, Raj D. Patel, Guerino G. Sacripante
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Patent number: 6495302Abstract: A toner process including, for example, mixing a latex with a colorant wherein the latex contains resin and an ionic surfactant, and the colorant contains a surfactant and a colorant; adding a polyaluminum chloride; affecting aggregation by heating; adding a chelating component and a base wherein the base increases the pH of the formed aggregates; heating the resulting mixture to accomplish coalescence; and isolating the toner.Type: GrantFiled: June 11, 2001Date of Patent: December 17, 2002Assignee: Xerox CorporationInventors: Lu Jiang, Nan-Xing Hu, Raj D. Patel, Walter Mychajlowskij, Michael A. Hopper
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Publication number: 20020187416Abstract: A toner process including, for example, mixing a latex with a colorant wherein the latex contains resin and an ionic surfactant, and the colorant contains a surfactant and a colorant; adding a polyaluminum chloride; affecting aggregation by heating; adding a chelating component and a base wherein the base increases the pH of the formed aggregates; heating the resulting mixture to accomplish coalescence; and isolating the toner.Type: ApplicationFiled: June 5, 2002Publication date: December 12, 2002Applicant: Xerox CorporationInventors: Lu Jiang, Nan-Xing Hu, Raj D. Patel, Walter Mychajlowskij, Michael A. Hopper
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Publication number: 20020187415Abstract: A toner process including, for example, mixing a latex with a colorant wherein the latex contains resin and an ionic surfactant, and the colorant contains a surfactant and a colorant; adding a polyaluminum chloride; affecting aggregation by heating; adding a chelating component and a base wherein the base increases the pH of the formed aggregates; heating the resulting mixture to accomplish coalescence; and isolating the toner.Type: ApplicationFiled: June 11, 2001Publication date: December 12, 2002Applicant: Xerox CorporationInventors: Lu Jiang, Nan-Xing Hu, Raj D. Patel, Walter Mychajlowskij, Michael A. Hopper
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Patent number: 6432601Abstract: A toner composition containing colorant and an alkali sulfonated polyester-amine resin composition generated, for example, from the reaction of an organic diol, an organic diacid, an alkali sulfonated diacid and an amino-organic diacid.Type: GrantFiled: April 19, 2001Date of Patent: August 13, 2002Assignee: Xerox CorporationInventors: Daniel A. Foucher, Walter Mychajlowskij, Raj D. Patel, Guerino G. Sacripante
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Patent number: 6352810Abstract: A process for the preparation of toner comprising mixing a colorant, a latex, and a polyamine followed by aggregation and coalescence, and wherein said process is accomplished in the presence of an oxidizing agent.Type: GrantFiled: February 16, 2001Date of Patent: March 5, 2002Assignee: Xerox CorporationInventors: Lu Jiang, Walter Mychajlowskij, Michael A. Hopper
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Patent number: 6348561Abstract: An alkali sulfonated polyester-amine resin generated from the reaction of an organic diol, and a mixture of an organic diacid, an alkali sulfonated diacid and an amino-organic diacid.Type: GrantFiled: April 19, 2001Date of Patent: February 19, 2002Assignee: Xerox CorporationInventors: Walter Mychajlowskij, Daniel A. Foucher, Raj D. Patel, Guerino G. Sacripante
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Patent number: 6210783Abstract: Disclosed is a transparency comprised of a supporting substrate, and thereover and thereunder two coatings, a first heat dissipating antistatic coating layer in contact with the substrate, and wherein the first coating contains a heat dissipating binder optionally with a melting point, for example, in the range of from about 100 to about 260° C., and an antistatic compound and a second ink receiving coating layer thereover containing a blend of a binder polymer, an alkylated oxazoline, a lightfastness compound, and an optional biocide.Type: GrantFiled: July 17, 1998Date of Patent: April 3, 2001Assignee: Xerox CorporationInventors: Shadi L. Malhotra, Raymond W. Wong, Walter Mychajlowskij, Daniel A. Foucher
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Patent number: 6190820Abstract: A process for the preparation of toner by, for example (i) generating by emulsion polymerization in the presence of an initiator a first resin latex emulsion; (ii) generating in the presence of an oil soluble initiator by solution polymerization a second resin latex; (iii) mixing (ii) with a colorant; (iiib) mixing the resin latex emulsion of (i) with the resin/colorant mixture of (iii) to provide a blend of a resin and colorant; (iv) adding an aqueous inorganic cationic coagulant solution of a metal salt and optionally an organic cationic coagulant to the resin/colorant blend of (iiib); (v) heating at a temperature of from about 5° C. to about 10° C. below the resin Tg of (i), to form aggregate particles; (vi) adjusting the pH of (v) by the addition of a base; (vii) heating the aggregate particles of (v) at temperatures of from about 5° C. to about 50° C. above the Tg of the resin of (i), followed by the addition of an acid.Type: GrantFiled: September 7, 2000Date of Patent: February 20, 2001Assignee: Xerox CorporationInventors: Raj D. Patel, Michael A. Hopper, Walter Mychajlowskij
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Patent number: 6110636Abstract: A surfactant free process for the preparation of toner comprising heating a mixture of an emulsion latex, a colorant, and a polyelectrolyte.Type: GrantFiled: October 29, 1998Date of Patent: August 29, 2000Assignee: Xerox CorporationInventors: Daniel A. Foucher, Walter Mychajlowskij, Guerino G. Sacripante, Raj D. Patel
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Patent number: 6020101Abstract: A toner comprised of a core comprised a first resin and colorant, and thereover a shell comprised of a second resin and wherein said first resin is an ion complexed sulfonated polyester resin, and said second resin is a transition metal ion complex sulfonated polyester resin.Type: GrantFiled: April 21, 1999Date of Patent: February 1, 2000Assignee: Xerox CorporationInventors: Guerino G. Sacripante, Raj D. Patel, Walter Mychajlowskij, Daniel A. Foucher
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Patent number: 5981651Abstract: A process comprising (1) polymerizing an organic phase of monomer in the presence of a carboxylic acid, an oil soluble chain transfer agent, and a partially water soluble chain transfer agent; and which polymerizing is accomplished in the presence of (2) an aqueous phase containing a nonionic surfactant, and an anionic surfactant, and wherein there is added to the aqueous phase an aqueous initiator solution of an inorganic persulfate, and wherein the resulting latex contains particles of polymer with carboxylic acid; aggregating said latex particles with colorant; thereafter adding an effective amount of anionic surfactant and heating the mixture resulting about equal to, or about above the polymer Tg resulting from said monomer, or said monomers.Type: GrantFiled: September 2, 1997Date of Patent: November 9, 1999Assignee: Xerox CorporationInventors: Raj D. Patel, Grazyna E. Kmiecik-Lawrynowicz, Michael A. Hopper, Walter Mychajlowskij