Patents by Inventor Eric G. Johnson

Eric G. Johnson 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 compositions with liposomes containing photochromic compounds
    Patent number: 5633109
    Abstract: Disclosed is an ink composition which comprises an aqueous liquid vehicle, a photochromic material, and a vesicle-forming lipid, wherein vesicles of the lipid are present in the ink.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: May 27, 1997
    Assignee: Xerox Corporation
    Inventors: Carol A. Jennings, Marcel P. Breton, MaryAnna Isabella, Eric G. Johnson, Trevor I. Martin, John F. Oliver
  • Photochromic hot melt ink compositions
    Patent number: 5593486
    Abstract: Disclosed is a hot melt ink composition comprising (a) an ink vehicle, said ink vehicle being a solid at about 25.degree. C. and having a viscosity of from about 1 to about 20 centipoise at a temperature suitable for hot melt ink jet printing, said temperature being greater than about 45.degree. C., (b) a photochromic material, (c) an optional colorant, and (d) an optional propellant.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: January 14, 1997
    Assignee: Xerox Corporation
    Inventors: John F. Oliver, Trevor I. Martin, Carol A. Jennings, Eric G. Johnson, Stephan V. Drappel
  • Photochromic microemulsion ink compositions
    Patent number: 5551973
    Abstract: Disclosed is an ink composition which comprises an aqueous phase, an oil phase, a photochromic material, and a surfactant, said ink exhibiting a liquid crystalline gel phase at a first temperature and a liquid microemulsion phase at a second temperature higher than the first temperature.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: September 3, 1996
    Assignee: Xerox Corporation
    Inventors: John F. Oliver, Trevor I. Martin, Carol A. Jennings, Eric G. Johnson, Marcel P. Breton