Patents by Inventor Ralph A. Mosher

Ralph A. Mosher 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).

  • Transport layers containing two or more charge transporting molecules
    Patent number: 5413886
    Abstract: An electrophotographic imaging member including a charge generating layer and a charge transport layer, the charge transport layer having two or more charge transporting molecules having ionization potentials within 0.2 electron Volts of each other. This imaging member has stress characteristics that reduces curling, cracking and delamination from the substrate.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: May 9, 1995
    Assignee: Xerox Corporation
    Inventors: Damodar M. Pai, Huoy-Jen Yuh, John F. Yanus, Andrew R. Melnyk, Ralph A. Mosher, Tsu-Sen Chow
  • Liquid developer compositions with fluoroalkyl groups
    Patent number: 5411834
    Abstract: A negatively charged liquid developer comprised of thermoplastic resin particles, optional pigment, a charge director, and an insoluble charge adjuvant comprised of a copolymer of an alkene and an unsaturated acid derivative, and wherein the acid derivative contains pendant fluoroalkyl or pendant fluoroaryl groups, and wherein the charge adjuvant is associated with or combined with said resin and said optional pigment.
    Type: Grant
    Filed: February 24, 1994
    Date of Patent: May 2, 1995
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, James R. Larson, John W. Spiewak, David H. Pan, Ralph A. Mosher, Frank J. Bonsignore
  • Liquid developer compositions with quaternized polyamines
    Patent number: 5409796
    Abstract: A positively charged liquid developer comprised of thermoplastic resin particles, optional pigment, a charge director, and a charge adjuvant comprised of a polymer of an alkene and unsaturated acid derivative; and wherein the acid derivative contains pendant ammonium groups, and wherein the charge adjuvant is associated with or combined with said resin and said optional pigment.An example of a charge adjuvent copolymer compound containing alkylene and an unsaturated acid derivative such as acrylic acid and methacrylic acid containing pendent ammonium groups is represented, for example, by the following general formula ##STR1## wherein Z is oxygen or substituted nitrogen; Y is alkyl; R is hydrogen, alkyl or aryl; and X is an anion.
    Type: Grant
    Filed: February 24, 1994
    Date of Patent: April 25, 1995
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, James R. Larson, John W. Spiewak, David H. Pan, Ralph A. Mosher, Frank J. Bonsignore
  • Toner compositions with hydrogenated components
    Patent number: 5324611
    Abstract: A toner composition comprised of hydrogenated resin particles and pigment particles.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: June 28, 1994
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Ralph A. Mosher
  • Monomodal, monodisperse toner compositions and imaging processes thereof
    Patent number: 5312704
    Abstract: A toner composition comprised of pigment particles, and a resin comprised of a monomodal polymer resin or monomodal polymer resin blends and wherein the monomodal resin or resin blends possess a narrow polydispersity.
    Type: Grant
    Filed: January 4, 1993
    Date of Patent: May 17, 1994
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Ralph A. Mosher, Anita C. Van Laeken
  • Toner and developer compositions with coupled liquid glass resins
    Patent number: 5215846
    Abstract: A toner composition comprised of chemically coupled multiblock or liquid glass resin particles with a glass transition temperature of between from about 20.degree. C. to about 65.degree. C., and pigment particles.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: June 1, 1993
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, William M. Prest, Jr., Ralph A. Mosher, Anita C. VanLaeken
  • Toner and developer compositions with semicrystalline polyolefin resins
    Patent number: 5166026
    Abstract: A toner composition comprised of semicrystalline copolymer resin particles with a melting point of from about 30.degree. C. to about 100.degree. C., and containing functional groups comprising hydroxy, carboxy, amino, amido, ammonium or halo, and pigment particles.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: November 24, 1992
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Stephan Drappel, Thomas W. Smith, Michael J. Levy, Richard B. Lewis, Ralph A. Mosher