Patents by Inventor Shigang S. Qiu
Shigang S. Qiu 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: 8518627Abstract: The present disclosure provides processes for producing toners. In embodiments, silica is added as a chelating agent during the toner production process contributing to enhanced triboelectric charging properties of the toner particles.Type: GrantFiled: January 24, 2011Date of Patent: August 27, 2013Assignee: Xerox CorporationInventors: Allan K. Chen, Santiago Faucher, Shigang S. Qiu, Karen A. Moffat, Richard P. N. Veregin
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Publication number: 20130122418Abstract: A process including contacting an alkyl benzene sulfonate surfactant having an ammonium salt counter ion with a component to be emulsified or dispersed, wherein the alkyl benzene sulfonate surfactant is substantially free of sodium salt counter ions such that the sodium content of the alkyl benzene sulfonate surfactant is less than about 5,000 parts per million, and water to form a mixture; using the alkyl benzene sulfonate surfactant to emulsify the component and form an emulsion; or using the alkyl benzene sulfonate surfactant to disperse the component and form a dispersion.Type: ApplicationFiled: November 10, 2011Publication date: May 16, 2013Applicant: Xerox CorporationInventors: Kimberly D. Nosella, Shigang S. Qiu, Santiago Faucher, Allan Chen
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Patent number: 8338071Abstract: A process for making a latex emulsion suitable for use in a toner composition includes contacting at least one crystalline polyester resin with an organic solvent to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and continuously recovering latex particles.Type: GrantFiled: May 21, 2010Date of Patent: December 25, 2012Assignee: Xerox CorporationInventors: Shigang S. Qiu, David R. Kurceba, Zhaoyang Ou
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Publication number: 20120231386Abstract: A toner composition including a colorant-polyester polymer having at least one colorant and at least one polyester resin, an optional non-colorant polyester polymer, an optional additional colorant, an optional wax, and an optional additive, where the colorant is covalently linked to some or all of the polyester resin and the polyester resin is obtained by polymerizing a lactone using an enzyme catalyst. Methods for preparing a toner composition including an emulsion aggregation process.Type: ApplicationFiled: March 9, 2011Publication date: September 13, 2012Applicant: XEROX CORPORATIONInventors: Santiago FAUCHER, Kimberly D. NOSELLA, Shigang S. QIU
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Publication number: 20120189955Abstract: The present disclosure provides processes for producing toners. In embodiments, silica is added as a chelating agent during the toner production process contributing to enhanced triboelectric charging properties of the toner particles.Type: ApplicationFiled: January 24, 2011Publication date: July 26, 2012Applicant: XEROX CORPORATIONInventors: Allan K. Chen, Santiago Faucher, Shigang S. Qiu, Karen A. Moffat, Richard P.N. Veregin
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Publication number: 20120189956Abstract: The present disclosure provides processes for producing toners. In embodiments, alkyl or alkyl ether sulfates are used in a solvent-free toner production process as surfactants to provide for higher parent particle charge without adversely affecting particle size, distribution control and circularity of the toner particles. The present disclosure also provides a new formulation and process for the emulsification of polyester resins to form nano-scale particles dispersed in water (latex) without the use of organic solvents by an extrusion process.Type: ApplicationFiled: January 26, 2011Publication date: July 26, 2012Applicant: XEROX CORPORATIONInventors: Allan K. Chen, Santiago Faucher, John L. Pawlak, Joo T. Chung, Shigang S. Qiu, Michael S. Hawkins, Edward G. Zwartz, Abdisamed Sheik-Qasim, Melanie Lynn Davis
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Patent number: 8192913Abstract: A process for making a latex emulsion suitable for use in a toner composition includes contacting at least one amorphous polyester resin with an organic solvent to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, separating the solvent from water, and recycling the solvent from the resin mixture for utilization in a subsequent phase inversion emulsion process.Type: GrantFiled: May 12, 2010Date of Patent: June 5, 2012Assignee: Xerox CorporationInventors: Santiago Faucher, Kimberly D. Nosella, Shigang S. Qiu, Zhaoyang Ou
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Patent number: 8147714Abstract: Fluorescent organic nanoparticles and a process for producing fluorescent organic nanoparticles having a size of less than about 500 nanometers comprising a polymeric matrix comprising one or more crosslinked polymer resins, and comprising one or more fluorescent dyes incorporated into the polymer matrix.Type: GrantFiled: October 6, 2008Date of Patent: April 3, 2012Assignee: Xerox CorporationInventors: Gabriel Iftime, Daryl W. Vanbesien, Jordan H. Wosnick, Shigang S. Qiu, Kelly Zhou, Valerie M. Farrugia
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Publication number: 20110281216Abstract: A process for making a latex emulsion suitable for use in a toner composition includes contacting at least one crystalline polyester resin with an organic solvent to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and continuously recovering latex particles.Type: ApplicationFiled: May 21, 2010Publication date: November 17, 2011Applicant: XEROX CORPORATIONInventors: Shigang S. Qiu, David R. Kurceba, Zhaoyang Ou
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Publication number: 20110281215Abstract: A process for making a latex emulsion suitable for use in a toner composition includes contacting at least one amorphous polyester resin with an organic solvent to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, separating the solvent from water, and recycling the solvent from the resin mixture for utilization in a subsequent phase inversion emulsion process.Type: ApplicationFiled: May 12, 2010Publication date: November 17, 2011Applicant: XEROX CORPORATIONInventors: Santiago Faucher, Kimberly D. Nosella, Shigang S. Qiu, Zhaoyang Ou
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Publication number: 20110200930Abstract: A process for making a latex emulsion suitable for use in a toner composition includes contacting at least one polyester resin optionally with an organic solvent to form a resin mixture, adding a primary amine, optionally a surfactant, and deionized water to the mixture.Type: ApplicationFiled: February 18, 2010Publication date: August 18, 2011Applicant: XEROX CORPORATIONInventors: Shigang S. Qiu, Kimberly D. Nosella, Tie Hwee Ng, Santiago Faucher, Fumii Higuchi
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Patent number: 7989135Abstract: A process for making a resin emulsion suitable for use in forming toner particles includes melt mixing a resin possessing acid groups at a temperature higher than the glass transition temperature of the resin, optionally adding a surfactant before, prior to, during, or after melt mixing the resin, and adding a basic neutralization agent and water to the resin to form an emulsion. In embodiments, the resin emulsion thus produced may be utilized to form a toner.Type: GrantFiled: February 15, 2008Date of Patent: August 2, 2011Assignee: Xerox CorporationInventors: Ke Zhou, Shigang S. Qiu, Karen Ann Moffat, Guerino G. Sacripante
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Patent number: 7851549Abstract: A process for preparing a curable polyester based emulsion is provided in embodiments, containing one or more unsaturated polyesters and one or more photoinitiators obtained by a phase inversion process, in which the particle size and particle size distribution is controlled by process parameters, such as solvent, solvent ratio, neutralization ratio of the resin and temperature.Type: GrantFiled: December 13, 2007Date of Patent: December 14, 2010Assignee: Xerox CorporationInventors: Guerino G. Sacripante, George Liebermann, Nathan Belliveau, Shigang S. Qiu
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Publication number: 20100084610Abstract: Fluorescent organic nanoparticles and a process for producing fluorescent organic nanoparticles having a size of less than about 500 nanometers comprising a polymeric matrix comprising one or more crosslinked polymer resins, and comprising one or more fluorescent dyes incorporated into the polymer matrix.Type: ApplicationFiled: October 6, 2008Publication date: April 8, 2010Applicant: XEROX CORPORATIONInventors: Gabriel IFTIME, Daryl W. VANBESIEN, Jordan H. WOSNICK, Shigang S. QIU, Kelly ZHOU, Valerie M. FARRUGIA
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Patent number: 7645551Abstract: Disclosed herein are toner particles generated by emulsion/aggregation processes. The processes are conducted under conditions that shorten the time for coalescence and post-formation washing, thereby increasing efficiency of the processes as compared to conventional processes.Type: GrantFiled: March 6, 2007Date of Patent: January 12, 2010Assignee: Xerox CorporationInventors: Amgad W. Sifain, Emily L. Moore, Anthony Uttaro, Jr., Peter V. Nguyen, Jon T. Owens, Ryan Accetta, Karen A. Moffat, Vladislav Skorokhod, Cuong Vong, Wafa F. Bashir, Richard P. N. Veregin, Shigang S. Qiu
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Publication number: 20090208864Abstract: A process for making a resin emulsion suitable for use in forming toner particles includes melt mixing a resin possessing acid groups at a temperature higher than the glass transition temperature of the resin, optionally adding a surfactant before, prior to, during, or after melt mixing the resin, and adding a basic neutralization agent and water to the resin to form an emulsion. In embodiments, the resin emulsion thus produced may be utilized to form a toner.Type: ApplicationFiled: February 15, 2008Publication date: August 20, 2009Applicant: XEROX CORPORATIONInventors: Ke Zhou, Shigang S. Qiu, Karen Ann Moffat, Guerino G. Sacripante
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Publication number: 20090155712Abstract: A process for preparing a curable polyester based emulsion is provided in embodiments, containing one or more unsaturated polyesters and one or more photoinitiators obtained by a phase inversion process, in which the particle size and particle size distribution is controlled by process parameters, such as solvent, solvent ratio, neutralization ratio of the resin and temperature.Type: ApplicationFiled: December 13, 2007Publication date: June 18, 2009Applicant: XEROX CORPORATIONInventors: Guerino G. Sacripante, George Liebermann, Nathan Belliveau, Shigang S. Qiu
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Publication number: 20080220359Abstract: Disclosed herein are toner particles generated by emulsion/aggregation processes. The processes are conducted under conditions that shorten the time for coalescence and post-formation washing, thereby increasing efficiency of the processes as compared to conventional processes.Type: ApplicationFiled: March 6, 2007Publication date: September 11, 2008Applicant: XEROX CORPORATIONInventors: Amgad W. SIFAIN, Emily L. MOORE, Anthony UTTARO, Peter V. NGUYEN, Jon T. OWENS, Ryan ACCETTA, Karen A. MOFFAT, Vladislav SKOROKHOD, Cuong VONG, Wafa F. BASHIR, Richard P. N. VEREGIN, Shigang S. QIU
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Publication number: 20080220362Abstract: Image recording device comprising a development system including toner particles comprising a gel latex, a high Tg latex, a wax, and a colorant, and a fuser member, such as a fluoropolymer coated fuser member, which produces images having improved document offset, vinyl offset and half-tone rub properties.Type: ApplicationFiled: March 6, 2007Publication date: September 11, 2008Applicant: XEROX CORPORATIONInventors: Emily L. MOORE, Patricia A. BURNS, Michael L. GRANDE, William H. HOLLENBAUGH, Edward G. ZWARTZ, Shigang S. QIU, Maria N.V. MCDOUGALL, Daryl W. VANBESIEN, T. Brian MCANENEY
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Publication number: 20080166649Abstract: A toner composition having toner particles comprising a gel latex, a high Tg latex, a wax, and a colorant. The gel latex is present in an amount of from about 3 weight percent to about 30 weight percent of the toner composition, the high Tg latex is present in an amount of from about 50 weight percent to about 95 weight percent of the toner composition, the wax is present in an amount of from about 2 weight percent to about 40 weight percent of the toner composition, and the colorant is present in an amount of from about 1 weight percent to about 25 weight percent of the toner composition.Type: ApplicationFiled: December 13, 2006Publication date: July 10, 2008Applicant: Xerox CorporationInventors: Karen A. Moffat, Emily L. Moore, Daryl W. Vanbesien, Shigang S. Qiu, Vladislav Skorokhod, Edward G. Zwartz, Juan A. Morales-Tirado, William H. Hollenbaugh