Patents by Inventor Raj Patel

Raj Patel 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).

  • Publication number: 20060046180
    Abstract: A method of forming a xerographic image having at least one portion with a gloss different from a gloss of another portion of the xerographic image includes xerographically forming a toner image on a surface of a substrate and forming a finish over the toner image at the at least on portion, the finish being made of a differential gloss finish coating material that has a gloss different from that of the toner image. The differential gloss finish coating material is preferably an emulsion aggregation toner that is substantially free of pigments that adversely affect the transparency of the toner following fusing, the toner having gloss tunability through control of the amount of crosslinked portions included in the toner.
    Type: Application
    Filed: August 31, 2004
    Publication date: March 2, 2006
    Applicant: XEROX CORPORATION
    Inventors: David Sanders, Raj Patel, Michael Hopper
  • Publication number: 20060001944
    Abstract: A multicolored display and process for forming such a display is provided. The multicolored display includes marking particles comprising a mixture of photochromic materials. The photochromic materials each exhibit a first “invisible” photochromic state at a first absorption spectrum and at least a second “visible” photochromic state at a second absorption spectrum. The second “visible” photochromic state of each photochromic material produces a different color relative to the other photochromic materials. In embodiments, the marking particles include a mixture of a spiropyran material and a dithienylethene material.
    Type: Application
    Filed: June 30, 2004
    Publication date: January 5, 2006
    Inventors: Naveen Chopra, Daniel Foucher, Raj Patel
  • Publication number: 20050255402
    Abstract: A process involving heating a mixture of a colorant dispersion, a latex emulsion, and an optional wax dispersion in the presence of a coagulant containing a metal ion, a base, and an organic sequestering agent, and wherein said heating involves a first heating and a second heating, and wherein the second heating is at a higher temperature than the first heating; and wherein said higher temperature is equal to about or above about the Tg of polymer or resin contained in said latex emulsion.
    Type: Application
    Filed: June 25, 2003
    Publication date: November 17, 2005
    Inventors: Michael Hopper, Raj Patel
  • Publication number: 20050181294
    Abstract: A process for the preparation of toner by, for example, mixing a colorant, a latex, and a coagulant comprising cationic wax dispersion to provide, for example, a toner composition of high gloss images.
    Type: Application
    Filed: February 12, 2004
    Publication date: August 18, 2005
    Inventors: Michael Hopper, Raj Patel, Enno Agur, Joseph Bartel, Daryl Vanbesien
  • Publication number: 20050158649
    Abstract: A chemical toner composed of: (a) a resin including a compound which exhibits a molecular weight polydispersity of from about 1.1 to about 3.0; (b) an optional wax; and (c) a colorant, wherein the particle size of the chemical toner exhibits a geometric standard deviation of about 1.25 or less.
    Type: Application
    Filed: March 16, 2005
    Publication date: July 21, 2005
    Inventors: Daryl Vanbesien, Barkev Keoshkerian, Raj Patel, Danielle Boils-Boissier, Allison Rutland
  • Publication number: 20050042535
    Abstract: A chemical toner and an emulsion aggregation process for preparing the chemical toner, wherein the chemical toner is composed of: (a) a resin including a compound which exhibits a molecular weight polydispersity of from about 1.1 to about 3.0 (where the resin is produced by a stable free radical polymerization process); (b) an optional wax; and (c) a colorant, wherein the particle size of the chemical toner exhibits a geometric standard deviation of about 1.25 or less.
    Type: Application
    Filed: August 19, 2003
    Publication date: February 24, 2005
    Inventors: Daryl Vanbesien, Barkev Keoshkerian, Raj Patel, Danielle Boils-Boissier, Allison Rutland
  • Patent number: 5215847
    Abstract: Toner with well-dispersed component subparticles is prepared by a method wherein an attritor is initially used to disperse the subparticles in a core monomer, and attrition is continued during initial polymerization of the monomer. Interfacial polymerization is then performed in a preferred embodiment to form encapsulated toner particles.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: June 1, 1993
    Assignee: Xerox Corporation
    Inventors: Raj Patel, Hadi K. Mahabadi, Terry L. Bluhm, Sandra J. Gardner