Patents by Inventor George P. Marshall

George P. Marshall 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).

  • Random copolymers used as compatibilizers in toner compositions
    Patent number: 6787279
    Abstract: The present invention is a random copolymer and its use to compatibilize the components of mixtures of immiscible polymeric materials used in the preparation of toner formulations.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: September 7, 2004
    Assignee: Lexmark International, Inc.
    Inventors: Bryan Patrick Livengood, George P. Marshall, John Melvin Olson
  • Random copolymers used as compatibilizers in toner compositions
    Publication number: 20020197550
    Abstract: The present invention is a random copolymer and its use to compatibilize the components of mixtures of immiscible polymeric materials used in the preparation of toner formulations.
    Type: Application
    Filed: June 20, 2001
    Publication date: December 26, 2002
    Inventors: Bryan Patrick Livengood, George P. Marshall, John Melvin Olson
  • Powder coated charge roller
    Patent number: 5637391
    Abstract: Rubber charge roller cores are coated with styrene acrylic powder. Excess powder is removed, and the rollers are used in normal operation without the usual permanent outer layer. The more complex and costly outer layer of nylon is eliminated. Dust resulting from normal operation replaces the original powder coating.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: June 10, 1997
    Assignee: Lexmark International, Inc.
    Inventors: Curt J. Claflin, John Y. Kim, George P. Marshall, Ronald L. Roe, Donald W. Stafford
  • Ground anchors
    Patent number: 5522678
    Abstract: Apparatus and method of forming a ground anchor to spread evenly the loads produced during, for example, pipe lining. The ground anchors comprise a frame and means for clamping the frame to upper ends of a series of ground engaging piles such that the frame and piles define a substantially rigid assembly. The frame may comprise first and second frame portions through which the piles may be driven, the frame portions being held in spaced apart relationship during pile driving by temporary coupling means.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: June 4, 1996
    Assignee: Kelley Company, Inc.
    Inventors: George P. Marshall, Charles J. Ashdown
  • Dry toner with gelled resin for high speed printer
    Patent number: 5512408
    Abstract: A toner for a two component developer used in a high speed computer output printer has about 20 parts gelled styrene/acrylic resin, 40 parts acrylate resin, about 13 parts hydrogenated wood rosin ester with pentaerythritol, and about 18 parts rosin ester of pentaerythritol, as well as carbon black and a charge control agent. Exceptional improvement is noted in carrier deterioration, fuser roller life and photoconductor filming.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: April 30, 1996
    Assignee: Lexmark International, Inc.
    Inventors: Brian W. Baird, George P. Marshall, Michael G. Miller, James C. Minor
  • Roasting rack for poultry
    Patent number: D343549
    Type: Grant
    Filed: April 3, 1992
    Date of Patent: January 25, 1994
    Assignee: Jean B. Marshall
    Inventor: George P. Marshall, Jr.