Patents by Inventor Jeffrey H. Sokol

Jeffrey H. Sokol 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
    Patent number: 6379856
    Abstract: A toner composition comprised of binder, colorant, and a surface additive of a coated silica and wherein said silica possesses a BET surface area, in m2/g of from about 35 to about 65, a bulk density, in grams/liter, of from about 40 to about 60, and and wherein the size diameter determined from the BET measurement is from about 20 to about 100 nanometers.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: April 30, 2002
    Assignee: Xerox Corporation
    Inventors: Jeffrey H. Sokol, Edward J. Gutman
  • Toner binder of polyester having a high melt flow index and toners therefrom
    Patent number: 6358657
    Abstract: A toner having a high colorant concentration and a binder resin that includes a polyester resin having linear portions and crosslinked portions of high density crosslinked microgel particles has a melt flow index value of about 11±MFI units. The binder resin may also include a mixture of two polyester resins having different MFI values.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: March 19, 2002
    Assignee: Xerox Corporation
    Inventors: Scott M. Silence, Joo T. Chung, James M. Proper, John J. Ianni, Jeffrey H. Sokol, Hui Chang
  • Toner compositions
    Publication number: 20010005568
    Abstract: A toner composition comprised of binder, colorant, and a surface additive of a coated silica and wherein said silica possesses a BET surface area, in m2/g of from about 35 to about 65, a bulk density, in grams/liter, of from about 40 to about 60, and and wherein the size diameter determined from the BET measurement is from about 20 to about 100 nanometers.
    Type: Application
    Filed: February 2, 2001
    Publication date: June 28, 2001
    Applicant: Xerox Corporation
    Inventors: Jeffrey H. Sokol, Edward J. Gutman
  • Toner compositions
    Patent number: 6214507
    Abstract: A toner composition comprised of binder, colorant, and a surface additive of a coated silica and wherein said silica possesses a BET surface area, in m2/g of from about 35 to about 65, a bulk density, in grams/liter, of from about 40 to about 60, and wherein the size diameter determined from the BET measurement is from about 20 to about 100 nanometers.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: April 10, 2001
    Assignee: Xerox Corporation
    Inventors: Jeffrey H. Sokol, Edward J. Gutman
  • Process and apparatus for preparing toner particles
    Patent number: 5318431
    Abstract: Disclosed is an apparatus for obtaining toner particles with improved dispersion of additive components therein comprised of a toner extrusion device containing therein a blending chamber, a screw mixing means, a heating means, a toner supply means, and a means for injecting the additive components into the extrusion device enabling a decrease in the melting temperature of the toner resin particles contained therein.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: June 7, 1994
    Assignee: Xerox Corporation
    Inventors: Hui Chang, Jeffrey H. Sokol, Joseph L. Leonardo
  • Process for preparing toner particles
    Patent number: 4973439
    Abstract: Disclosed is an apparatus for obtaining toner particles with improved dispersion of additive components therein comprised of a toner extrusion device containing therein a blending chamber, a screw mixing means, a heating means, a toner supply means, and a means for injecting the additive components into the extrusion device enabling a decrease in the melting temperature of the toner resin particles contained therein.
    Type: Grant
    Filed: July 13, 1984
    Date of Patent: November 27, 1990
    Assignee: Xerox Corporation
    Inventors: Hui Chang, Jeffrey H. Sokol, Joseph L. Leonardo