Patents by Inventor William Riske

William Riske 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).

  • Ink jet printing process
    Patent number: 5345254
    Abstract: An ink jet printing process includes jetting an ink composition onto a substrate. The ink composition is an emulsion or suspension of an organic phase in a water phase, the organic phase including at least one of oil and wax.
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: September 6, 1994
    Assignee: Xerox Corporation
    Inventors: Raymond W. Wong, Marcel P. Breton, Melvin D. Croucher, James M. Duff, T. Edward Petroff, William Riske, Kerstin M. Henseleit
  • Toner and developer compositions with surface additives
    Patent number: 5202209
    Abstract: A toner composition comprised of resin particles, pigment particles, an optional charge enhancing additive component, or components, and a surface additive, or additives comprised of a metal oxide containing a coating thereover of a surfactant.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: April 13, 1993
    Assignee: Xerox Corporation
    Inventors: Francoise M. Winnik, William Riske, Anthony R. Davidson, Paul J. Gerroir, Richard P. N. Veregin
  • Ink compositions
    Patent number: 5139574
    Abstract: Disclosed is an ink composition which comprises an aqueous liquid vehicle, a water-soluble dye, and particles of a block copolymer of the formula ABA, wherein A represents a hydrophilic segment and B represents a hydrophobic segment, said ABA particles having an average diameter of about 300 Angstroms or less. The ink is particularly suitable for use in ink jet printing systems, especially thermal ink jet printing systems.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: August 18, 1992
    Assignee: Xerox Corporation
    Inventors: Francoise M. Winnik, Marcel P. Breton, William Riske