Patents by Inventor James L. Hoff

James L. Hoff 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).

  • Roofing seam installation process and products for the production of a seamed roof
    Patent number: 5976292
    Abstract: A process for preparing a lap seam for roofing comprising applying a butyl rubber-containing primer with a mesh pad to the EPDM membrane surfaces to be joined. The primer is applied with a long-handled applicator to permit the roofer to stand during priming. Thereafter a splice tape is positioned between the primed surfaces to form a seam structure and pressure is applied to the structure thus provided to form an adhesively-held lap seam characterized by being watertight and having superior peel strength when compared to other methods of making seam tapes.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: November 2, 1999
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: Daniel L. Barksdale, James E. Burkett, Joseph J. Kalwara, James L. Hoff
  • Roofing seam installation process
    Patent number: 5520761
    Abstract: A process for preparing a lap seam for roofing comprising applying a butyl rubber-containing primer with a mesh pad to the EPDM membrane surfaces to be joined, the primer having an elastomeric solids content of from about 15-20 percent, by weight. Thereafter positioning a splice tape between the primed surfaces to form a seam structure and applying pressure to the structure thus provided to form an adhesively-held lap seam characterized by being water tight and having superior peel strength.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: May 28, 1996
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: Joseph J. Kalwara, Daniel L. Barksdale, James L. Hoff
  • Fire retardant elastomeric EPDM roof sheeting and flashing composites
    Patent number: 4810565
    Abstract: A fire retardant composite roofing material comprising an upper layer of a fire retardant EPDM material and a lower layer of a non-fire retardant EPDM material, wherein this composite material is a cured sheet membrane, a vulcanizable flashing material, or non-vulcanizing flashing material.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: March 7, 1989
    Assignee: The Firestone Tire & Rubber Company
    Inventors: William A. Wasitis, James L. Hoff