Patents by Inventor Brent L. Grazman

Brent L. Grazman 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).

  • Base sheet for roofing assembly
    Patent number: 5890336
    Abstract: Roofing assembly having a substrate covered with a base sheet which is perforated with a plurality of uniformly spaced clusters of vertical apertures designed to receive an adhesive to bond the base sheet to the substrate. The roofing assembly possesses improved wind uplift resistance.
    Type: Grant
    Filed: February 5, 1998
    Date of Patent: April 6, 1999
    Assignee: Building Materials Corporation of America
    Inventors: Mira C. Kubiak, Harold C. Albo, Jr., Brent L. Grazman, William D. Lee, William J. Woodring
  • Base sheet for roofing assembly
    Patent number: 5848510
    Abstract: An improved base sheet for a roofing assembly wherein the base sheet is perforated with a plurality of apertures characterized by non-cylindrical cutouts in the shape of a closed figure or a polygon having at least two sides or boundaries of unequal length which aperture configuration permits strong attachment of the sheet to a substrate without the aid of auxiliary attachment means and without weakening of the base sheet structure.
    Type: Grant
    Filed: February 4, 1997
    Date of Patent: December 15, 1998
    Assignee: Building Materials Corporation of America
    Inventors: Brent L. Grazman, William J. Woodring
  • Base sheet for roofing assembly
    Patent number: D414279
    Type: Grant
    Filed: February 5, 1998
    Date of Patent: September 21, 1999
    Assignee: Building Materials Corporation of America
    Inventors: Mira C. Kubiak, Harold C. Albo, Jr., Brent L. Grazman, William D. Lee, William J. Woodring