Patents by Inventor Howard E. Munzel

Howard E. Munzel 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).

  • Fluorinated polymer coated carrier particles
    Patent number: 4147834
    Abstract: A carrier bead is disclosed having a core and at least an outer coating of polytetrafluoroethylene or fluorinated ethylene propylene. Use of these fluoropolymers as carrier coatings results in extremely long carrier life and overcomes problems that have heretofore plagued the commercialization of a magnetic brush development system for a plain paper electrostatic copying apparatus.
    Type: Grant
    Filed: December 14, 1976
    Date of Patent: April 3, 1979
    Assignee: International Business Machines Corporation
    Inventors: Howard E. Munzel, Carl A. Queener
  • Electrostatic imaging method using a polytetrafluoroethylene coated carrier particle
    Patent number: 3947271
    Abstract: A carrier bead is disclosed having a core and at least an outer coating of polytetrafluoroethylene or fluorinated ethylene propylene. Use of these fluoropolymers as carrier coatings results in extremely long carrier life and overcomes problems that have heretofore plagued the commercialization of a magnetic brush development system for a plain paper electrostatic copying apparatus.
    Type: Grant
    Filed: May 22, 1974
    Date of Patent: March 30, 1976
    Assignee: International Business Machines Corporation
    Inventors: Howard E. Munzel, Carl A. Queener