Patents by Inventor Josef Matkin

Josef Matkin 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).

  • Pressure-fixable toner material and method of making same
    Patent number: 4636451
    Abstract: Pressure-fixable toner particles suitable for use in electrostatic copying machines and method of preparing same. The toner particle is spherical in shape and comprises a thin, substantially continuous surface layer of polyurea, and an interior portion comprising a matrix of polyurea, said matrix having a colorant and pressure-fixable material contained therein, said polyurea matrix forming a continium extending from the surface layer inwardly toward the center of said particle.
    Type: Grant
    Filed: February 13, 1986
    Date of Patent: January 13, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Josef Matkin, Richard J. Treleaven