Patents by Inventor L. Gene Hartzell

L. Gene Hartzell 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).

  • Phosphate ceramic backing blocks and their preparation
    Patent number: 5139538
    Abstract: Phosphate ceramic backing blocks are provided for the profile sanding of wood. The blocks are made of rigid, non-foamed phosphate ceramic. The ceramic is dimensionally stable in spite of friction-caused heat, and also has a semi-polished finish that is achieved without polishing. The phosphate ceramic block is simply made by molding the wet reaction mixture for the ceramic, and then curing the ceramic mixture.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: August 18, 1992
    Assignee: Armstrong World Industries, Inc.
    Inventors: Debra L. Morris, L. Gene Hartzell
  • Phosphate ceramic backing blocks and their preparation
    Patent number: 5101600
    Abstract: Phosphate ceramic backing blocks are provided for the profile sanding of wood. The blocks are made of rigid, non-foamed phosphate ceramic. The ceramic is dimensionally stable in spite of friction-caused heat, and also has a semi-polished finish that is achieved without polishing. The phosphate ceramic block is simply made by molding the wet reaction mixture for the ceramic, and then curing the ceramic mixture.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: April 7, 1992
    Assignee: Armstrong World Industries, Inc.
    Inventors: Debra L. Morris, L. Gene Hartzell