Patents by Inventor John R. C. Fuller

John R. C. Fuller 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).

  • Photoresponsive imaging members with protective copolyurethane overcoatings
    Patent number: 5017645
    Abstract: An imaging member comprised of a photoconductive layer, and a protective copolyurethane overcoating of the formula ##STR1## wherein A is a trivalent group; A' is a bivalent group; R is selected from the group consisting of alkylene, substituted alkylene, arylene, and substituted arylene; x and y are number mole fractions of from about 0.05 to about 0.95 subsequent to the provision that the sum of x+y is equal to 1.0. Also disclosed are processes for the preparation of the aforementioned copolyurethanes.
    Type: Grant
    Filed: November 2, 1988
    Date of Patent: May 21, 1991
    Assignee: Xerox Corporation
    Inventors: Beng S. Ong, Dasarao K. Murti, John R. C. Fuller
  • Photoresponsive imaging members with fluorene hole transporting layers
    Patent number: 4853308
    Abstract: A layered photoresponsive imaging member comprised of a supporting substrate, a photogenerating layer, and a hole transport layer comprised of novel bis(diarylamino)fluorenes of the formula: ##STR1## where R and R' are independently selected from the group consisting of hydrogen, alkyl, and substituted alkyl groups; and Ar and Ar' are independently selected from the group consisting of aryl and substituted aryl substituents.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: August 1, 1989
    Assignee: Xerox Corporation
    Inventors: Beng S. Ong, John R. C. Fuller, Dasarao K. Murti
  • Photoresponsive imaging members with protective copolyurethane overcoatings
    Patent number: 4820601
    Abstract: An imaging member comprised of a photoconductive layer, and a protective copolyurethane overcoating of the formula: ##STR1## wherein A is a trivalent group; A' is a bivalent group; R is selected from the group consisting of alkylene, substituted alkylene, arylene, and substituted arylene; x and y are number mole fractions of from about 0.05 to about 0.95 subsequent to the provision that the sum of x+y is equal to 1.0. Also disclosed are processes for the preparation of the aforementioned copolyurethanes.
    Type: Grant
    Filed: February 1, 1988
    Date of Patent: April 11, 1989
    Assignee: Xerox Corporation
    Inventors: Beng S. Ong, Dasarao K. Murti, John R. C. Fuller
  • Latex based colored liquid developers
    Patent number: 4766049
    Abstract: Disclosed is a colored liquid developer composition comprised of an insulating oil base, a stabilized polymer latex component with imbibed molecularly dispersed colored dye components, and a thickener compatible with the stabilizer selected for the latex.
    Type: Grant
    Filed: January 9, 1987
    Date of Patent: August 23, 1988
    Assignee: Xerox Corporation
    Inventors: Melvin D. Croucher, Raymond W. Wong, James M. Duff, Michael L. Hair, John R. C. Fuller
  • Liquid developer compositions with high transfer efficiency
    Patent number: 4764446
    Abstract: Disclosed is a liquid developer composition comprised of an oil base selected from the group consisting of Magiesol and Isopar, pigment particles, a stabilizer, and a surfactant that enables flocculation of the developer components, and efficient wetting of the photoreceptor surface.
    Type: Grant
    Filed: February 12, 1987
    Date of Patent: August 16, 1988
    Assignee: Xerox Corporation
    Inventors: Melvin D. Croucher, George R. Pravato, John R. C. Fuller, James M. Duff