Patents by Inventor Richard J. Treleaven

Richard J. Treleaven 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).

  • Particles containing releasable fill material and method of making same
    Patent number: 4681806
    Abstract: Particles containing a releasable fill material and method of preparing same. A particle comprises a continuous polyurea surface layer, and an interior portion comprising a polyurea matrix, said matrix having a fill material contained therein, said matrix forming a continuum extending from the surface layer into the interior of the particle.
    Type: Grant
    Filed: February 13, 1986
    Date of Patent: July 21, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Josef Matkan, Richard J. Treleaven
  • 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