Patents by Inventor David Kurceba
David Kurceba 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: 9201321Abstract: A phase inversion emulsification process includes dissolving a polyester resin in a mixture comprising (1) an organic solvent, (2) a first portion of a total amount of neutralizing agent, and (3) a first portion of water, neutralizing the dissolved polyester resin with a second portion of neutralizing agent, the second portion of neutralizing agent including the remaining amount of the total amount neutralizing agent, forming an emulsion by adding a second portion of water after the neutralizing step, and removing a portion of the organic solvent from the emulsion to provide a latex.Type: GrantFiled: June 17, 2013Date of Patent: December 1, 2015Assignee: XEROX CORPORATIONInventors: Shigang Steven Qiu, Chieh-Min Cheng, Amy Grillo, Yulin Wang, Rashid Mahmood, David Kurceba
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Publication number: 20140370438Abstract: A phase inversion emulsification process includes dissolving a polyester resin in a mixture comprising (1) an organic solvent, (2) a first portion of a total amount of neutralizing agent, and (3) a first portion of water, neutralizing the dissolved polyester resin with a second portion of neutralizing agent, the second portion of neutralizing agent including the remaining amount of the total amount neutralizing agent, forming an emulsion by adding a second portion of water after the neutralizing step, and removing a portion of the organic solvent from the emulsion to provide a latex.Type: ApplicationFiled: June 17, 2013Publication date: December 18, 2014Inventors: Shigang Steven Qiu, Chieh-Min Cheng, Amy Grillo, Yulin Wang, Rashid Mahmood, David Kurceba
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Patent number: 8735033Abstract: A process for making emulsion aggregation (EA) toners is provided. In embodiments, the process comprises aggregating a mixture comprising a latex resin, and at least one colorant in a reactor to form aggregated toner particles, adding a shell resin to form a shell over the aggregated toner particles, coalescing the aggregated toner particles, and recovering the toner particles.Type: GrantFiled: March 29, 2012Date of Patent: May 27, 2014Assignee: Xerox CorporationInventors: Yulin Wang, Kimberly Nosella, David Kurceba, Santiago Faucher
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Publication number: 20130260310Abstract: A process for making emulsion aggregation (EA) toners is provided. In embodiments, the process comprises aggregating a mixture comprising a latex resin, and at least one colorant in a reactor to form aggregated toner particles, adding a shell resin to form a shell over the aggregated toner particles, coalescing the aggregated toner particles, and recovering the toner particles.Type: ApplicationFiled: March 29, 2012Publication date: October 3, 2013Applicant: XEROX CORPORATIONInventors: Yulin Wang, Kimberly Nosella, David Kurceba, Santiago Faucher
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Patent number: 8142975Abstract: A method of making toner particles, including mixing at least one emulsion of at least one resin, a colorant, an optional wax, and optional additives to form a slurry; heating the slurry to form aggregated particles in the slurry; freezing aggregation of the particles by adjusting the pH; and heating the aggregated particles in the slurry to coalesce the particles into toner particles.Type: GrantFiled: June 29, 2010Date of Patent: March 27, 2012Assignee: Xerox CorporationInventors: Daryl W. Vanbesien, Paul Gerroir, Karen A. Moffat, Melanie L. Davis, Abdisamed Sheik-Qasim, David Kurceba, Faisal Shamshad, Michael D'Amato, Juan A. Morales-Tirado
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Publication number: 20110318685Abstract: A method of making toner particles, including mixing at least one emulsion of at least one resin, a colorant, an optional wax, and optional additives to form a slurry; heating the slurry to form aggregated particles in the slurry; freezing aggregation of the particles by adjusting the pH; and heating the aggregated particles in the slurry to coalesce the particles into toner particles.Type: ApplicationFiled: June 29, 2010Publication date: December 29, 2011Applicant: XEROX CORPORATIONInventors: Daryl W. Vanbesien, Paul Gerroir, Karen A. Moffat, Melanie L. Davis, Abdisamed Sheik-Qasim, David Kurceba, Faisal Shamshad, Michael D'Amato, Juan A. Morales-Tirado
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Patent number: 7977025Abstract: A method of making toner particles, including: mixing, at less than about 17° C. and without homogenizing, a resin emulsion with a coagulant, a colorant, an optional wax, and optional additives, to form pre-aggregated particles in a slurry; heating the slurry to form aggregated toner particles; freezing aggregation of the particles in the slurry once at a desired aggregated particle size; and further heating the aggregated particles in the slurry to coalesce the aggregated particles into toner particles.Type: GrantFiled: December 3, 2009Date of Patent: July 12, 2011Assignee: Xerox CorporationInventors: Kimberly D. Nosella, Tie Hwee Ng, Allan K. Chen, Abdisamed Sheik-Qasim, David Kurceba, Shigang Qiu, Santiago Faucher
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Publication number: 20110136058Abstract: A method of making toner particles, including: mixing, at less than about 17° C. and without homogenizing, a resin emulsion with a coagulant, a colorant, an optional wax, and optional additives, to form pre-aggregated particles in a slurry; heating the slurry to form aggregated toner particles; freezing aggregation of the particles in the slurry once at a desired aggregated particle size; and further heating the aggregated particles in the slurry to coalesce the aggregated particles into toner particles.Type: ApplicationFiled: December 3, 2009Publication date: June 9, 2011Applicant: XEROX CORPORATIONInventors: Kimberly D. NOSELLA, Tie Hwee NG, Allan K. CHEN, Abdisamed SHEIK-QASIM, David KURCEBA, Shigang QIU, Santiago FAUCHER
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Patent number: 7439004Abstract: Methods include washing and de-watering toner particles using a horizontal filter press.Type: GrantFiled: November 30, 2004Date of Patent: October 21, 2008Assignee: Xerox CorporationInventors: Steven M Malachowski, Chieh-Min Cheng, David Kurceba, Tie Hwee Ng, Abdisamed Sheik-Qasim, Melanie Davis
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Patent number: 7217484Abstract: Disclosed is an oil-less toner composition exhibiting good low temperature release and stripping in fixing, enhanced surface gloss of fixed image, and/or OHP transparency. By controlling one or more properties, such as the relative thermal energy input during the EA aggregation/coalescence process, using a wax having a certain dispersion size (D50), molecular weight and/or melting temperature, the toner particle produced thereby can achieve optimal surface wax protrusion with a surface wax content of about 12 to about 25 weight percent. This is based on the total amount of wax in the toner, as determined by x-ray photoelectron spectroscopy (XPS). The contamination of wax on developing rolls, photoreceptor and carriers, which lowers the reliability of the developer, is suppressed with the present exemplary embodiment.Type: GrantFiled: April 3, 2006Date of Patent: May 15, 2007Assignee: Xerox CorporationInventors: Vincenzo Marcello, David Kurceba, Nancy Hunt, Cheih-Min Cheng, Tie Hwee Ng
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Publication number: 20060194134Abstract: Disclosed is an oil-less toner composition exhibiting good low temperature release and stripping in fixing, enhanced surface gloss of fixed image, and/or OHP transparency. By controlling one or more properties, such as the relative thermal energy input during the EA aggregation/coalescence process, using a wax having a certain dispersion size (D50), molecular weight and/or melting temperature, the toner particle produced thereby can achieve optimal surface wax protrusion with a surface wax content of about 12 to about 25 weight percent. This is based on the total amount of wax in the toner, as determined by x-ray photoelectron spectroscopy (XPS). The contamination of wax on developing rolls, photoreceptor and carriers, which lowers the reliability of the developer, is suppressed with the present exemplary embodiment.Type: ApplicationFiled: April 3, 2006Publication date: August 31, 2006Inventors: Vincenzo Marcello, David Kurceba, Nancy Hunt, Cheih-Min Cheng, Tie Ng
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Publication number: 20060115764Abstract: Methods include washing and de-watering toner particles using a horizontal filter press.Type: ApplicationFiled: November 30, 2004Publication date: June 1, 2006Applicant: XEROX CORPORATIONInventors: Steven Malachowski, Chieh-Min Cheng, David Kurceba, Tie Ng, Abdisamed Sheik-Qasim, Melanie Davis
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Patent number: 7052818Abstract: Disclosed is an oil-less toner composition exhibiting good low temperature release and stripping in fixing, enhanced surface gloss of fixed image, and/or OHP transparency. By controlling one or more properties, such as the relative thermal energy input during the EA aggregation/coalescence process, using a wax having a certain dispersion size (D50), molecular weight and/or melting temperature, the toner particle produced thereby can achieve optimal surface wax protrusion with a surface wax content of about 12 to about 25 weight percent. This is based on the total amount of wax in the toner, as determined by x-ray photoelectron spectroscopy (XPS). The contamination of wax on developing rolls, photoreceptor and carriers, which lowers the reliability of the developer, is suppressed with the present exemplary embodiment.Type: GrantFiled: December 23, 2003Date of Patent: May 30, 2006Assignee: Xerox CorporationInventors: Vincenzo Marcello, David Kurceba, Nancy Hunt, Cheih-Min Cheng, Tie Hwee Ng
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Publication number: 20050136350Abstract: Disclosed is an oil-less toner composition exhibiting good low temperature release and stripping in fixing, enhanced surface gloss of fixed image, and/or OHP transparency. By controlling one or more properties, such as the relative thermal energy input during the EA aggregation/coalescence process, using a wax having a certain dispersion size (D50), molecular weight and/or melting temperature, the toner particle produced thereby can achieve optimal surface wax protrusion with a surface wax content of about 12 to about 25 weight percent. This is based on the total amount of wax in the toner, as determined by x-ray photoelectron spectroscopy (XPS). The contamination of wax on developing rolls, photoreceptor and carriers, which lowers the reliability of the developer, is suppressed with the present exemplary embodiment.Type: ApplicationFiled: December 23, 2003Publication date: June 23, 2005Inventors: Vincenzo Marcello, David Kurceba, Nancy Hunt, Cheih-Min Cheng, Tie Ng
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Patent number: 6447974Abstract: A process for the preparation of a latex polymer by (i) preparing or providing a water aqueous phase containing an anionic surfactant in an optional amount of less than or equal to about 20 percent by weight of the total amount of anionic surfactant used in forming the latex polymer; (ii) preparing or providing a monomer emulsion in water which emulsion contains an anionic surfactant; (iii) adding about 50 percent or less of said monomer emulsion to said aqueous phase to thereby initiate seed polymerization and to form a seed polymer, said aqueous phase containing a free radical initiator; and (iv) adding the remaining percent of said monomer emulsion to the composition of (iii) and heating to complete an emulsion polymerization thus forming a latex polymer.Type: GrantFiled: July 2, 2001Date of Patent: September 10, 2002Assignee: Xerox CorporationInventors: Allan K. Chen, George Liebermann, Tie Hwee Ng, Arthur Helbrecht, Abdisamed Sheik-qasim, David Kurceba, Chieh-Min Cheng, Emily L. Moore
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Patent number: 5650255Abstract: An in situ chemical process for the preparation of toner comprised of(i) the provision of a latex, which latex is comprised of polymeric resin particles, an ionic surfactant and a nonionic surfactant;(ii) providing a pigment dispersion, which dispersion is comprised of a pigment solution, a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant, and optionally a charge control agent;(iii) mixing said pigment dispersion with said latex with a stirrer equipped with an impeller, stirring at speeds of from about 100 to about 900 rpm for a period of from about 10 minutes to about 150 minutes;(iv) heating the above resulting blend of latex and pigment mixture to a temperature below about the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates;(v) adding further aqueous ionic surfactant or stabilizer in the range amount of from about 0.Type: GrantFiled: September 3, 1996Date of Patent: July 22, 1997Assignee: Xerox CorporationInventors: T. Hwee Ng, Arthur Helbrecht, Raj D. Patel, Grazyna E. Kmiecik-Lawrynowicz, David Kurceba, Francisco E. Torres, David J. Sanders