Patents by Inventor Enno E. Agur
Enno E. Agur 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: 9348248Abstract: A process for making a latex emulsion including contacting at least one amorphous polyester resin with at least two organic solvents to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and separating the solvent from water. Further, the process is carried out above the resin Tg for making the latex, which drives the latex particle size under 100 nm, where toners made from the latex show improved charging performance.Type: GrantFiled: December 22, 2014Date of Patent: May 24, 2016Assignee: Xerox CorporationInventors: Shigang Qiu, Richard P N Veregin, Kimberly D Nosella, Santiago Faucher, Cuong Vong, Enno E Agur
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Publication number: 20150104743Abstract: A process for making a latex emulsion including contacting at least one amorphous polyester resin with at least two organic solvents to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and separating the solvent from water. Further, the process is carried out above the resin Tg for making the latex, which drives the latex particle size under 100 nm, where toners made from the latex show improved charging performance.Type: ApplicationFiled: December 22, 2014Publication date: April 16, 2015Inventors: Shigang Qiu, Richard PN Veregin, Kimberly D Nosella, Santiago Faucher, Cuong Vong, Enno E Agur
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Patent number: 8916320Abstract: A process for making a latex emulsion including contacting at least one amorphous polyester resin with at least two organic solvents to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and separating the solvent from water. Further, the process is carried out above the resin Tg for making the latex, which drives the latex particle size under 100 nm, where toners made from the latex show improved charging performance.Type: GrantFiled: January 15, 2013Date of Patent: December 23, 2014Assignee: Xerox CorporationInventors: Shigang Qiu, Richard P N Veregin, Kimberly D Nosella, Santiago Faucher, Cuong Vong, Enno E Agur
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Publication number: 20140199625Abstract: A process for making a latex emulsion including contacting at least one amorphous polyester resin with at least two organic solvents to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and separating the solvent from water. Further, the process is carried out above the resin Tg for making the latex, which drives the latex particle size under 100 nm, where toners made from the latex show improved charging performance.Type: ApplicationFiled: January 15, 2013Publication date: July 17, 2014Applicant: XEROX CORPORATIONInventors: Shigang Qiu, Richard PN Veregin, Kimberly D. Nosella, Santiago Faucher, Cuong Vong, Enno E. Agur
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Publication number: 20140045116Abstract: A method of making a toner that includes adding pigments into an emulsion aggregation toner without first preparing a pigment dispersion. The method eliminates the pigment dispersion step in the manufacture of emulsion aggregation toilers by surface-treating pigments. Dry surface-treated pigments can be directly incorporated into the toner prior to aggregation in the aggregation coalescence process without the need to first prepare aqueous pigment dispersions.Type: ApplicationFiled: August 7, 2012Publication date: February 13, 2014Applicant: XEROX CORPORATIONInventors: Enno E. AGUR, Shigang S. QIU, Ke ZHOU, Cuong VONG, Edward G. ZWARTZ, Santiago FAUCHER
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Patent number: 8247157Abstract: The present disclosure provides processes for increasing the shelf life and stability of resin emulsions suitable for use in forming toner particles. In embodiments, the pH of the resin emulsion is monitored, and a base is added as needed to maintain the pH of the emulsion at from about 6.5 to about 8. Maintaining the pH at from about 6.5 to about 8 prevents the degradation of the resin in the emulsion, including its molecular weight.Type: GrantFiled: December 9, 2008Date of Patent: August 21, 2012Assignee: Xerox CorporationInventors: Kimberly D. Nosella, Enno E. Agur, Shigang Qiu, Ke Zhou
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Patent number: 8197998Abstract: Toner particles are provided which may, in embodiments, include a core and a shell. In embodiments, charge control agents may be co-emulsified with a resin utilized to form a shell. The shell may prevent a crystalline resin in the core from migrating to the toner surface. Inclusion of the charge control agent in the shell itself may provide the resulting toner particles with desirable charge characteristics and sensitivity to relative humidity.Type: GrantFiled: May 20, 2009Date of Patent: June 12, 2012Assignee: Xerox CorporationInventors: Ke Zhou, Maria N. V. McDougall, Karen A. Moffat, Richard P. N. Veregin, Enno E. Agur
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Patent number: 8178274Abstract: The present disclosure provides toners and processes for preparing toner particles possessing excellent charging characteristics. The process includes forming a dispersion including at least one organic and/or organometallic charge control agent, and then combining that dispersion with an emulsion suitable for use in forming toner particles.Type: GrantFiled: July 21, 2008Date of Patent: May 15, 2012Assignee: Xerox CorporationInventors: Enno E. Agur, Daryl W. Vanbesien, Ke Zhou, Michael S. Hawkins, Maria N. V. McDougall, Richard P. N. Veregin, Edward G. Zwartz
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Patent number: 7851519Abstract: A polyester resin emulsion includes crosslinked polyester resin in an emulsion medium, the crosslinked polyester resin having a degree of crosslinking of from about 0.1 percent to about 100 percent. The emulsion can be formed by solvent flashing a mixture of a polyester resin, an initiator, a solvent, and an emulsion medium, wherein the crosslinked polyester resin has a degree of crosslinking of from about 0.1 percent to about 100 percent.Type: GrantFiled: January 25, 2007Date of Patent: December 14, 2010Assignee: Xerox CorporationInventors: Enno E. Agur, Daryl W. Vanbesien, Valerie M. Farrugia, Guerino G. Sacripante, Maria N. V. McDougall, Edward G. Zwartz
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Publication number: 20100297546Abstract: Toner particles are provided which may, in embodiments, include a core and a shell. In embodiments, charge control agents may be co-emulsified with a resin utilized to form a shell. The shell may prevent a crystalline resin in the core from migrating to the toner surface. Inclusion of the charge control agent in the shell itself may provide the resulting toner particles with desirable charge characteristics and sensitivity to relative humidity.Type: ApplicationFiled: May 20, 2009Publication date: November 25, 2010Applicant: Xerox CorporationInventors: Ke Zhou, Maria N.V. McDougall, Karen A. Moffat, Richard P.N Veregin, Enno E. Agur
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Patent number: 7785763Abstract: A process for preparing a toner, includes solvent flashing wax and resin together to emulsify the resin and wax to a sub-micro size; mixing the wax and resin emulsion with a colorant, and optionally a coagulant to form a mixture; heating the mixture at a temperature below a glass transition temperature of the resin to aggregate the resin, colorant, and wax, to form aggregated particles; heating the aggregated particles and coalescent agent at a temperature above the glass transition temperature of said resin, to coalesce the aggregated particles to form toner particles, optionally cooling the mixture; and isolating the toner particles.Type: GrantFiled: October 13, 2006Date of Patent: August 31, 2010Assignee: Xerox CorporationInventors: Enno E. Agur, Guerino G. Sacripante, Michael S. Hawkins, Edward G. Zwartz
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Publication number: 20100143839Abstract: The present disclosure provides processes for increasing the shelf life and stability of resin emulsions suitable for use in forming toner particles. In embodiments, the pH of the resin emulsion is monitored, and a base is added as needed to maintain the pH of the emulsion at from about 6.5 to about 8. Maintaining the pH at from about 6.5 to about 8 prevents the degradation of the resin in the emulsion, including its molecular weight.Type: ApplicationFiled: December 9, 2008Publication date: June 10, 2010Applicant: Xerox CorporationInventors: Kimberly D. Nosella, Enno E. Agur, Shigang Qiu, Ke Zhou
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Publication number: 20100015544Abstract: The present disclosure provides toners and processes for preparing toner particles possessing excellent charging characteristics. The process includes forming a dispersion including at least one organic and/or organometallic charge control agent, and then combining that dispersion with an emulsion suitable for use in forming toner particles.Type: ApplicationFiled: July 21, 2008Publication date: January 21, 2010Applicant: XEROX CORPORATIONInventors: Enno E. Agur, Daryl W. Vanbesien, Ke Zhou, Michael S. Hawkins, Maria N.V. McDougall, Richard P.N. Veregin, Edward G. Zwartz
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Patent number: 7645552Abstract: Toner compositions include a non cross linked resin; a cross linked resin or gel; a wax; and a colorant. Processes for preparing a toner include mixing a non-cross linked resin and a cross-linked resin or gel in the presence of a wax, a colorant, and a coagulant to provide toner size aggregates; adding additional non-cross linked latex to the formed aggregates thereby providing a shell over the formed aggregates; heating the shell covered aggregates to form toner; and, optionally, isolating the toner.Type: GrantFiled: December 3, 2004Date of Patent: January 12, 2010Assignee: Xerox CorporationInventors: Raj D. Patel, Daryl Vanbesien, Enno E. Agur, Edward G. Zwartz, Maria N. V. McDougall, Emily L. Moore, Patricia A. Burns, Kimberly D. Nosella, Ke Zhou, Vladislav Skorokhod, Wafa F. Bashir, Shigang (Steven) Qiu
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Patent number: 7560505Abstract: A wax emulsion comprised of polyethylene wax and one or more surfactants in an aqueous medium, wherein the polyethylene wax has a degree of crystallinity of from about 50% to about 80% by weight of the polyethylene wax, is provided. The wax emulsion is made by emulsifying the polyethylene wax, one or more surfactants and an aqueous medium in a vessel at a temperature at or above the melting point of the polyethylene wax to form an emulsified product, and subsequently cooling the emulsified product to ambient temperature at a cooling rate of at least 10° C. per minute. The wax emulsion is preferably incorporated into toner particles prepared by emulsion/aggregation/coalescing.Type: GrantFiled: March 24, 2008Date of Patent: July 14, 2009Assignee: Xerox CorporationInventors: Enno E. Agur, Joseph A. Bartel, Patricia A. Burns, Danielle C. Boils-Boissier, Sheau V. Kao
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Patent number: 7547499Abstract: A toner includes binder of amorphous polymer material, such as an amorphous polyester material, and a crystalline polymer material, such as a crystalline polyester material, wherein the amorphous polymer material has an acid number that is greater than an acid number of the crystalline polymer material. Further, the toner may have a minimum fusing temperature of from about 75° C. to about 150° C. and a relative humidity sensitivity of from about 0.5 to about 10. A method of making toner particles is also indicated.Type: GrantFiled: December 22, 2006Date of Patent: June 16, 2009Assignee: Xerox CorporationInventors: Richard P. N. Veregin, Geurino G. Sacripante, Maria N. V. McDougall, Paul J. Gerroir, Enno E. Agur
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Patent number: 7442740Abstract: A toner process that includes a first heating of a colorant dispersion, a first polyester resin free latex emulsion, a second polyester latex emulsion, and a wax dispersion in the presence of a coagulant containing a metal ion; adding a third polyester free latex; adding an organic sequestering compound or a silicate salt sequestering compound, followed by a second heating.Type: GrantFiled: April 8, 2008Date of Patent: October 28, 2008Assignee: Xerox CorporationInventors: Raj D Patel, Guerino G Sacripante, Edward G Zwartz, Enno E Agur, Allan K Chen, T. Hwee Ng, Kimberly D Nosella, Cuong Vong, Karen A Moffat
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Publication number: 20080187855Abstract: A toner process that includes a first heating of a colorant dispersion, a first polyester resin free latex emulsion, a second polyester latex emulsion, and a wax dispersion in the presence of a coagulant containing a metal ion; adding a third polyester free latex; adding an organic sequestering compound or a silicate salt sequestering compound, followed by a second heating.Type: ApplicationFiled: April 8, 2008Publication date: August 7, 2008Applicant: XEROX CORPORATIONInventors: Raj D. Patel, Guerino G. Sacripante, Edward G. Zwartz, Enno E. Agur, Allan K. Chen, T Hwee Ng, Kimberly D. Nosella, Cuong Vong, Karen A. Moffat
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Publication number: 20080182193Abstract: A polyester resin emulsion includes crosslinked polyester resin in an emulsion medium, the crosslinked polyester resin having a degree of crosslinking of from about 0.1 percent to about 100 percent. The emulsion can be formed by solvent flashing a mixture of a polyester resin, an initiator, a solvent, and an emulsion medium, wherein the crosslinked polyester resin has a degree of crosslinking of from about 0.1 percent to about 100 percent.Type: ApplicationFiled: January 25, 2007Publication date: July 31, 2008Applicant: XEROX CORPORATIONInventors: Enno E. AGUR, Daryl W. VANBESIEN, Valerie M. FARRUGIA, Guerino G. SACRIPANTE, Maria N.V. MCDOUGALL, Edward G. ZWARTZ
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Publication number: 20080171283Abstract: A wax emulsion comprised of polyethylene wax and one or more surfactants in an aqueous medium, wherein the polyethylene wax has a degree of crystallinity of from about 50% to about 80% by weight of the polyethylene wax, is provided. The wax emulsion is made by emulsifying the polyethylene wax, one or more surfactants and an aqueous medium in a vessel at a temperature at or above the melting point of the polyethylene wax to form an emulsified product, and subsequently cooling the emulsified product to ambient temperature at a cooling rate of at least 10° C. per minute. The wax emulsion is preferably incorporated into toner particles prepared by emulsion/aggregation/coalescing.Type: ApplicationFiled: March 24, 2008Publication date: July 17, 2008Applicant: XEROX CORPORATIONInventors: Enno E. Agur, Joseph A. Bartel, Patricia A. Burns, Danielle C. Boils, Sheau V. Kao