Patents by Inventor Daniel Foucher

Daniel Foucher 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).

  • Patent number: 5648193
    Abstract: A process for the preparation of toner compositions, or particles comprised ofi) flushing a pigment into a sulfonated polyester resin, and which resin has a degree of sulfonation of from between about 2.5 and 20 mol percent;ii) dispersing the resulting sulfonated pigmented polyester resin into water, which water is at a temperature of from about 40 to about 95.degree. C., by a high speed shearing polytron device operating at speeds of from about 100 to about 5,000 revolutions per minute thereby enabling the formation of stable toner sized submicron particles, and which particles are of a volume average diameter of from about 5 to about 200 nanometers;iii) allowing the resulting dispersion to cool to from about 5 to about 10.degree. C. below the glass transition temperature of said pigmented sulfonated polyester resin;iv) adding an alkali metal halide solution, which solution contains from about 0.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: July 15, 1997
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, Grazyna E. Kmiecik-Lawrynowicz, Guerino G. Sacripante, Daniel A. Foucher
  • Patent number: 5604066
    Abstract: A toner composition comprised of pigment, and a metallocene polymer. Also illustrated is a toner composition wherein the metallocene polymer is a metallocene polyester of the formula ##STR1## wherein R and R' are an alkylene or an arylene; M is the metal titanium; and wherein n and m represent the random segments of the polymer, and n is a number of from about 10 to about 1,000, and m is from about 1 to about 100.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: February 18, 1997
    Assignee: Xerox Corporation
    Inventors: Daniel A. Foucher, Guerino G. Sacripante, Richard P. N. Veregin, Maria N. V. McDougall