Patents by Inventor Michael A. Hopper

Michael A. Hopper 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: 20050176853
    Abstract: A process including blending a latex emulsion of resin, water, and an ionic surfactant, a colorant dispersion comprised of a colorant, water, and an ionic surfactant; and a wax dispersion comprised of wax, water and an ionic surfactant, heating the resulting mixture in the presence of coagulants, one of which is a source of calcium ions, which heating is below about the glass transition temperature (Tg) of the latex resin and subsequently heating above about the glass transition temperature (Tg) of the latex resin.
    Type: Application
    Filed: February 10, 2004
    Publication date: August 11, 2005
    Inventors: Michael Hopper, Joseph Bartel, Maria McDougall, Patricia Burns, Richard Veregin
  • Patent number: 6899987
    Abstract: A process for the preparation of toner by, for example, mixing a latex with a colorant mixture comprised of colorant, an ionic surfactant, and a polytetrafluoroethylene; adding a coagulant; heating the resulting mixture below about the glass transition temperature (Tg) of the latex resin; adding a stabilizer; heating above about the Tg of the latex resin; and isolating the toner.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: May 31, 2005
    Assignee: Xerox Corporation
    Inventors: Daryl Vanbesien, Raj D. Patel, Michael A. Hopper, Stephan V. Drappel
  • Publication number: 20050051406
    Abstract: A support assembly is provided for suspending lightweight tools or other objects, such as hairdryers and the like. The assembly provides support and in particular embodiments, electrical power to the object suspended. In addition, the assembly provides management of the power cord. Embodiments of the assembly include a quick release electrical connector deployed between and configured to selectively electrically connect and disconnect the tool from a power supply and/or a gimbal assembly configured to permit rotation of the tool about first and second axes, the cord extending through the gimbal assembly.
    Type: Application
    Filed: August 13, 2004
    Publication date: March 10, 2005
    Inventor: Michael Hopper
  • Publication number: 20040265728
    Abstract: A toner process involving the heating a mixture of an acicular magnetite dispersion, a colorant dispersion, a wax dispersion, a first latex containing a crosslinked resin, and a second latex containing a resin free of crosslinking in the presence of a coagulant to provide aggregates, stabilizing the aggregates with a silicate salt dissolved in a base, and further heating the aggregates to provide coalesced toner particles.
    Type: Application
    Filed: June 25, 2003
    Publication date: December 30, 2004
    Applicant: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper, Edward G. Zwartz, Cuong Vong, Allan K. Chen
  • Publication number: 20040265727
    Abstract: A process comprising heating a mixture of colorant and latex in the presence of a coagulant and a silicate salt, and wherein said heating comprises a first heating equal to or below about the glass transition temperature of a polymer contained in said latex, and a second heating equal to or about the glass transition temperature of a polymer contained in said latex; wherein said first heating enables the formation of aggregates and said second heating enables the fusion of said colorant and said polymer; and optionally wherein said silicate is contained in an alkali metal hydroxide.
    Type: Application
    Filed: June 25, 2003
    Publication date: December 30, 2004
    Applicant: Xerox Corporation
    Inventors: Daryl Vanbesien, Michael A. Hopper, Raj D. Patel
  • Publication number: 20040146797
    Abstract: A toner process involving mixing a colorant dispersion comprising an acicular magnetite dispersion and a colorant dispersion with a latex, a wax dispersion, a crosslinked resin, and a coagulant.
    Type: Application
    Filed: January 29, 2003
    Publication date: July 29, 2004
    Applicant: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper, Edward G. Zwartz, Allan K. Chen
  • Patent number: 6767684
    Abstract: A toner process involving mixing a colorant dispersion comprising an acicular magnetite dispersion and a colorant dispersion with a latex, a wax dispersion, a crosslinked resin, and a coagulant.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: July 27, 2004
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper, Edward G. Zwartz, Allan K. Chen
  • Publication number: 20040037947
    Abstract: A process for generating on a substrate, such as a document, a security mark comprised of a glossy ink containing a colorant.
    Type: Application
    Filed: August 20, 2002
    Publication date: February 26, 2004
    Applicant: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper, H. Bruce Goodbrand
  • Patent number: 6673500
    Abstract: A process comprising applying a toner security mark on a document generated by xerographic means, and which mark possesses white glossy characteristics, and wherein said toner is comprised of a waterborne polymer resin and a colorant, and optionally a second security mark generated by a toner comprised of a waterborne polymer resin and a UV fluorescent component.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: January 6, 2004
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, Fatima M. Mayer, Michael A. Hopper, Kurt I. Halfyard
  • Patent number: 6673505
    Abstract: A process for the preparation of a toner by mixing a colorant, a latex, optionally a wax and a polyamine salt coagulant to form toner size aggregates, wherein the polyamine salt is then neutralized or converted to an amide or hydrolyzed to an acid by the introduction of a base followed by a pH reduction with an acid to enable rapid coalescence or fusion of the aggregates.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: January 6, 2004
    Assignee: Xerox Corporation
    Inventors: Lu Jiang, Armin R. Volkel, Chieh-Min Cheng, Michael A. Hopper, Walter Mychajlowskij, Raj D. Patel
  • Patent number: 6664017
    Abstract: A process comprising applying a toner security mark on a document generated by xerographic means and which mark possesses white glossy characteristics, and wherein said toner is comprised of a polymer and a colorant.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: December 16, 2003
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper, H. Bruce Goodbrand, Kurt I. Halfyard, Nan-Xing Hu
  • Patent number: 6656658
    Abstract: A toner process comprising heating an acidified dispersion of an acicular magnetite, a carbon black colorant dispersion, an optional wax dispersion, and an acicular latex.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: December 2, 2003
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper, Joseph Bartel, Edward G. Zwartz
  • Patent number: 6656657
    Abstract: A toner process comprising mixing an acidified dispersion of an acicular magnetite with an anionic latex, an anionic carbon black dispersion, and an anionic wax dispersion.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: December 2, 2003
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper, Joseph Bartel, Edward G. Zwartz
  • Patent number: 6627373
    Abstract: An emulsion aggregation process for the preparation of a magnetite toner, and where the magnetite can function as a negatively charged coagulant to facilitate aggregation of a basic cationic latex, a cationic carbon black dispersion and a cationic wax dispersion.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: September 30, 2003
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper
  • Publication number: 20030180648
    Abstract: A process which involves the heating of a magnetite dispersion, a colorant dispersion, a latex emulsion, and a coagulant, wherein the coagulant can be a polymetal halide, and the mixture is aggregated by heating below the latex resin glass transition temperature, and thereafter heating above the latex resin glass transition temperature, followed by cooling and isolating the product, which product can be a toner.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 25, 2003
    Applicant: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper, Vladislav Skorokhod, Richard P. N. Veregin, Michael S. Hawkins, Paul j. Gerroir
  • Publication number: 20030180650
    Abstract: An emulsion aggregation process for the preparation of a magnetite toner, and where the magnetite can function as a negatively charged coagulant to facilitate aggregation of a basic cationic latex, a cationic carbon black dispersion and a cationic wax dispersion.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 25, 2003
    Applicant: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper
  • Publication number: 20030180651
    Abstract: An emulsion aggregation process for the preparation of a magnetite toner, and where the magnetite can function as a coagulant.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 25, 2003
    Applicant: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper
  • Publication number: 20030180647
    Abstract: A toner process comprising mixing an acidified dispersion of an acicular magnetite with an anionic latex, an anionic carbon black dispersion, and an anionic wax dispersion.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 25, 2003
    Applicant: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper, Joseph Bartel, Edward G. Zwartz
  • Publication number: 20030180652
    Abstract: A process for the preparation of a toner by mixing a colorant, a latex, optionally a wax and a polyamine salt coagulant to form toner size aggregates, wherein the polyamine salt is then neutralized or converted to an amide or hydrolyzed to an acid by the introduction of a base followed by a pH reduction with an acid to enable rapid coalescence or fusion of the aggregates.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 25, 2003
    Applicant: Xerox Corporation
    Inventors: Lu Jiang, Armin R. Volkel, Chieh-Min Cheng, Michael A. Hopper, Walter Mychajlowskij, Raj D. Patel
  • Publication number: 20030180649
    Abstract: A toner process comprising heating an acidified dispersion of an acicular magnetite, a carbon black colorant dispersion, an optional wax dispersion, and an acicular latex.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 25, 2003
    Applicant: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper, Joseph Bartel, Edward G. Zwartz