Patents by Inventor Anthony R. Davidson

Anthony R. Davidson 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).

  • Toner compositions with dendrimer charge enhancing additives
    Patent number: 5332640
    Abstract: A dry toner composition comprised of resin particles, pigment particles, and a dendrimer charge enhancing additive.
    Type: Grant
    Filed: July 20, 1993
    Date of Patent: July 26, 1994
    Assignee: Xerox Corporation
    Inventors: James M. Duff, Francoise M. Winnik, Guerino G. Sacripante, Anthony R. Davidson
  • Colorless fast-drying ink compositions for printing concealed images detectable by fluorescence
    Patent number: 5286286
    Abstract: Disclosed is an ink composition consisting essentially of water, diethylene glycol-monobutyl ether, glycerol, an optional cyclohexyl pyrrolidinone component, a dye selected from the group consisting of dyes containing dansyl chromophores and dyes containing porphyrin chromophores, an optional biocide, and an optional polyalkylene oxide/bisphenol-A additive.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: February 15, 1994
    Assignee: Xerox Corporation
    Inventors: Francoise M. Winnik, Anthony R. Davidson, Marcel P. Breton
  • Ink compositions
    Patent number: 5271764
    Abstract: An ink composition comprised of a solution comprised of a dye comprised of a porphyrin chromophore.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: December 21, 1993
    Assignee: Xerox Corporation
    Inventors: Francoise M. Winnik, Mitchell A. Winnik, Anthony R. Davidson
  • Toner compositions with dendrimer charge enhancing additives
    Patent number: 5256516
    Abstract: A dry toner composition comprised of resin particles, pigment particles, and a dendrimer charge enhancing additive.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: October 26, 1993
    Assignee: Xerox Corporation
    Inventors: Francoise M. Winnik, James M. Duff, Guerino G. Sacripante, Anthony R. Davidson
  • Porphyrin chromophore and dendrimer ink composition
    Patent number: 5256193
    Abstract: An ink composition comprised of a solution comprised of a dye comprised of a porphyrin chromophore and a dendrimer.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: October 26, 1993
    Assignee: Xerox Corporation
    Inventors: Francoise M. Winnik, Anthony R. Davidson, Marcel P. Breton
  • 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
  • Inks containing block copolymer micelles
    Patent number: 5145518
    Abstract: Disclosed is an ink composition which comprises an aqeuous liquid vehicle and particles of an average diameter of 100 nanometers or less which comprise micelles of block copolymers of the formula ABA, wherein A represents a hydrophilic segment and B represents a hydrophobic segment, and wherein dye molecules are covalently attached to the micelles, said dye molecules being detectable when exposed to radiation outside the visible wavelength range. Optionally, silica is precipitated within the micelles. In a specific embodiment, the dye molecules are substantially colorless. In another specific embodiment, the ink also contains a colorant detectable in the visible wavelength range.
    Type: Grant
    Filed: May 30, 1991
    Date of Patent: September 8, 1992
    Assignee: Xerox Corporation
    Inventors: Francoise M. Winnik, Anthony R. Davidson, John W-P. Lin, Melvin D. Croucher
  • Ink compositions
    Patent number: 5120361
    Abstract: An ink composition comprised of a solution comprised of a dendrimer and a dye or dyes.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: June 9, 1992
    Assignee: Xerox Corporation
    Inventors: Francoise M. Winnik, Anthony R. Davidson, Marcel P. Breton
  • Inks with dendrimer colorants
    Patent number: 5098475
    Abstract: An ink composition comprising a solution with a dendrimer colored with a dye or dyes covalently attached thereto. As optional additives there may be included in the ink humectants and biocides. The aforementioned inks can be prepared by mixing the appropriate components such as a dendrimer, water and a reactive dye. Also disclosed is a process for the utilization of the aforementioned compositions and ink jet printing processes.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: March 24, 1992
    Assignee: Xerox Corporation
    Inventors: Francoise M. Winnik, Anthony R. Davidson, Marcel P. Breton