Patents by Inventor William Hargis Barton

William Hargis Barton 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).

  • Polyurethane coatings and drive rollers including the same
    Patent number: 6954606
    Abstract: A drive roller having a polyurethane coating that has a coefficient of friction with respect to a belt effective to drive the belt over the operative life of the belt. The drive roller may be included in an image-forming device to drive a belt.
    Type: Grant
    Filed: April 18, 2003
    Date of Patent: October 11, 2005
    Assignee: Lexmark International, Inc.
    Inventors: Johnathan Lee Barnes, William Hargis Barton, Donald Leo Elbert, Kathryn Dowlen Mullins, Stacy Marie Pargett, Ronald Lloyd Roe
  • Polyurethane coatings and drive rollers including the same
    Publication number: 20040205967
    Abstract: A drive roller comprising a polyurethane coating having a coefficient of friction with respect to a belt effective to drive the belt over the operative life of the belt. The drive roller may be included in an image-forming device to drive a belt.
    Type: Application
    Filed: April 18, 2003
    Publication date: October 21, 2004
    Inventors: Johnathan Lee Barnes, William Hargis Barton, Donald Leo Elbert, Kathryn Dowlen Mullins, Stacy Marie Pargett, Ronald Lloyd Roe
  • Charge roller
    Patent number: 6072970
    Abstract: A charge roller has a steel shaft and conductive outer cylindrical body which is formed by curing with heat a blend comprised of epichlorohydrin rubber, mineral-oil-free zinc oxide dispersion, stearic acid as a lubricant, accelerators and a sulfur donor. The roller has a long useful life and does not express oil while inactive.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: June 6, 2000
    Assignee: Lexmark International, Inc.
    Inventors: William Hargis Barton, Alan Stirling Campbell, Martin Victor DiGirolamo, Donald Wayne Stafford