Patents by Inventor Suresh K. Ahuja
Suresh K. Ahuja 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: 7291428Abstract: An electrophotographic imaging member having a charge generating layer and a charge transport layer overlayed thereon is provided. The charge transport layer has a lower surface and an upper surface, wherein the lower surface is in contiguous contact with the charge generating layer. The charge transport layer comprises a film forming polymer binder and a charge transport compound molecularly dispersed or dissolved therein to form a solid solution. The concentration of the charge transport compound in the charge transport layer decreases from the lower surface to the upper surface. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improved wear resistance, excellent imaging member electrical performance, and improved copy print out quality.Type: GrantFiled: December 15, 2006Date of Patent: November 6, 2007Assignee: Xerox CorporationInventors: Satchidanand Mishra, Anthony M. Horgan, Robert C. U. Yu, Dasarao K. Murti, Suresh K. Ahuja
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Patent number: 7186494Abstract: A toner process comprising mixing a colorant dispersion with a latex, a wax dispersion, and a coagulant, and wherein the latex contains a polymer with a static yield stress of from about 0.05 to about 3 dyne/cm2, a viscosity for the polymer latex of from about 5 to about 35 centipoises (cps), and wherein said toner product possesses a volume average particle size distribution index GSDv of equal to or less than about 1.27, a number average particle size distribution index GSDn of equal to or less than about 1.30, a low number average particle size index GSDn50/16 of equal to about or less than about 1.32, and a ratio of the volume average particle size distribution index GSDv to a number average particle size distribution index GSDn of from about 0.93 to about 1.Type: GrantFiled: April 14, 2003Date of Patent: March 6, 2007Assignee: Xerox CorporationInventors: Suresh K. Ahuja, Chieh-Min Cheng
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Patent number: 7166397Abstract: An electrophotographic imaging member having a charge generating layer and a charge transport layer overlayed thereon is provided. The charge transport layer has a lower surface and an upper surface, wherein the lower surface is in contiguous contact with the charge generating layer. The charge transport layer comprises a film forming polymer binder and a charge transport compound molecularly dispersed or dissolved therein to form a solid solution. The concentration of the charge transport compound in the charge transport layer decreases from the lower surface to the upper surface. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improved wear resistance, excellent imaging member electrical performance, and improved copy print out quality.Type: GrantFiled: December 23, 2003Date of Patent: January 23, 2007Assignee: Xerox CorporationInventors: Satchidanand Mishra, Anthony M. Horgan, Robert C. U. Yu, Dasarao K. Murti, Suresh K. Ahuja
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Publication number: 20040202950Abstract: A toner process comprising mixing a colorant dispersion with a latex, a wax dispersion, and a coagulant, and wherein the latex contains a polymer with a static yield stress of from about 0.05 to about 3 dyne/cm2, a viscosity for the polymer latex of from about 5 to about 35 centipoises (cps), and wherein said toner product possesses a volume average particle size distribution index GSDv of equal to or less than about 1.27, a number average particle size distribution index GSDn of equal to or less than about 1.30, a low number average particle size index GSDn50/16 of equal to about or less than about 1.32, and a ratio of the volume average particle size distribution index GSDv to a number average particle size distribution index GSDn of from about 0.93 to about 1.Type: ApplicationFiled: April 14, 2003Publication date: October 14, 2004Applicant: Xerox Corporation.Inventors: Suresh K. Ahuja, Chieh-Min Cheng
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Patent number: 6585816Abstract: Disclosed is a phase change ink composition comprising a colorant and an ink vehicle, said ink being a solid at temperatures less than about 50° C., wherein the ink vehicle comprises a borate ester.Type: GrantFiled: November 9, 2001Date of Patent: July 1, 2003Assignee: Xerox CorporationInventors: Thomas W. Smith, Suresh K. Ahuja
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Patent number: 6501934Abstract: Transfer members useful in electrostatographic reproducing apparatus, including digital, image-on-image and contact electrostatic printing apparatus. The transfer members feature a substrate comprising a nanosize polymer material and can be used as transfer members, transfuse, transfix members, or transport members.Type: GrantFiled: October 26, 2000Date of Patent: December 31, 2002Assignee: Xerox CorporationInventors: Suresh K. Ahuja, Richard B. McGriff, Timothy J. Waldnig
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Patent number: 6361915Abstract: A process for manufacturing a conductive micro-powder includes the steps of: (i) forming an aqueous dispersion of conductive material and the first surfactant, (ii) mixing a latex emulsion of a polymer and a second surfactant into the aqueous dispersion to form a suspension and (iii) recovering the conductive micro-powder from the suspension. The first and second surfactants are of the same class and polarity. The conductive micro-powder finds particular utility as a coating for carrier core particles, and as a conductive coating component of carrier particle coatings.Type: GrantFiled: November 28, 2000Date of Patent: March 26, 2002Assignee: Xerox CorporationInventors: John G. Van Dusen, Frederick J. Good, Vladislav Skorokhod, Suresh K. Ahuja, Michael S. Hawkins
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Patent number: 6194112Abstract: A process including: heating resin coated core particles for a time until the weight average molecular weight of the resin coating declines.Type: GrantFiled: October 4, 1999Date of Patent: February 27, 2001Assignee: Xerox CorporationInventors: Suresh K. Ahuja, Richard B. Mcgriff, Timothy J. Waldnig, Deepak R. Maniar, Robert A. Gill, Kevin Marcell
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Patent number: 5805964Abstract: An apparatus and process for reducing accumulation of toner from the surface of an electrode member in a development unit of an electrostatographic printing apparatus by providing an inorganic coating on at least a portion of the electrode member.Type: GrantFiled: April 29, 1997Date of Patent: September 8, 1998Assignee: Xerox CorporationInventors: Santokh S. Badesha, Arnold W. Henry, George J. Heeks, J. Stephen Kittelberger, John G. VanDusen, Suresh K. Ahuja, Merlin E. Scharfe, Richard L. Schank, Mark J. Hirsch
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Patent number: 5787329Abstract: An apparatus and process for reducing accumulation of toner from the surface of an electrode member in a development unit of an electrostatographic printing apparatus by providing an organic coating on at least a portion of the electrode member.Type: GrantFiled: April 29, 1997Date of Patent: July 28, 1998Assignee: Xerox CorporationInventors: John R. Laing, Edward J. Gutman, J. Stephen Kittelberger, John G. VanDusen, Suresh K. Ahuja, Merlin E. Scharfe, Richard L. Schank, Mark J. Hirsch, Santokh S. Badesha, Arnold W. Henry, George J. Heeks
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Patent number: 5761587Abstract: An apparatus for reducing accumulation of toner from the surface of an electrode member in a development unit of an electrostatographic printing apparatus which includes providing a low surface energy coating on at least a portion of the electrode member.Type: GrantFiled: April 29, 1997Date of Patent: June 2, 1998Assignee: Xerox CorporationInventors: John R. Laing, Edward J. Gutman, J. Stephen Kittelberger, John G. VanDusen, Suresh K. Ahuja, Merlin E. Scharfe, Richard L. Schank, Mark J. Hirsch, Santokh S. Badesha, Arnold W. Henry, George J. Heeks
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Patent number: 5532327Abstract: A solution polymerization process for producing an organic polymer from styrene and at least one other polymerizable monomer comprising providing a liquid reaction medium suitable for conducting said polymerization, wherein the reaction medium contains styrene and a polymerizable monomer other than styrene; and, anionically polymerizing styrene and monomer, thereby forming random copolymer chains, wherein the total quantity of said styrene used in said polymerization is at least 50% by weight based on the total weight of styrene and other polymerizable monomers used in the polymerization. A second embodiment comprises a copolymer made by the above-described method.Type: GrantFiled: February 27, 1995Date of Patent: July 2, 1996Assignee: Xerox CorporationInventors: Robert D. Bayley, Thomas R. Hoffend, Timothy J. Fuller, Suresh K. Ahuja
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Patent number: 5124224Abstract: A process for the preparation of a toner with a melting point of from about 100.degree. to about 130.degree. C. which comprises the addition of a linear crystalline polyethylene with a weight average molecular weight of from about 500 to about 1,200 to a toner comprised of a polyester and pigment.Type: GrantFiled: April 1, 1991Date of Patent: June 23, 1992Assignee: Xerox CorporationInventors: John S. Berkes, Paul C. Julien, Suresh K. Ahuja, Che C. Chow
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Patent number: 4990424Abstract: A toner composition comprised of a blend of resin particles containing styrene polymers or polyesters, and components selected from the group consisting of a semicrystalline polyolefin and copolymers thereof with a melting point of from about 50.degree. C. to about 100.degree. C., and pigment particles.Type: GrantFiled: August 12, 1988Date of Patent: February 5, 1991Assignee: Xerox CorporationInventors: John G. Van Dusen, Timothy J. Fuller, Suresh K. Ahuja
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Patent number: 4952477Abstract: A toner composition comprised of resin particles selected from the group consisting of a semicrystalline polyolefin and copolymers thereof which a melting point of from about 50.degree. C. to about 100.degree. C., and pigment particles.Type: GrantFiled: August 12, 1988Date of Patent: August 28, 1990Assignee: Xerox CorporationInventors: Timothy J. Fuller, Thomas W. Smith, William M. Prest, Jr., Robert A. Nelson, Kathleen M. McGrane, Suresh K. Ahuja