Patents by Inventor Kenneth S. Hoffman

Kenneth S. Hoffman 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).

  • Patent number: 5946862
    Abstract: A flashing strip for use in providing waterproofing for roofing, more particularly for use at the intersection of a vertical wall and an angled roof top. The flashing strip of the present invention includes a plurality of flashing cards pre-assembled and bent into an "L-shaped" configuration. Each of the plurality of flashing cards barred to an adjacent a card to form the flashing strip of the present invention.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: September 7, 1999
    Inventor: Kenneth S. Hoffman
  • Patent number: 4822659
    Abstract: A thermally insulative fire block sheet having an elastomeric layer is provided which has a surface flammability flame spread index of zero at 20 minutes of exposure in accordance with ASTM E-162 and which is capable, in a thickness of 1/16 inch, of blocking a flame of 1900.degree. F. for more than an hour. The sheet comprises at least two layers. One layer, facing the direction of the expected flame, is a silicone foam rubber comprising the reaction product of a vinylterminated polysiloxane containing --Si(CH.sub.3).sub.2 O-- units and an organohydrogensiloxane polymer containing Si(H)(CH.sub.3)O-- units. The silicone foam rubber also contains alumina trihydrate. The other layer is an adherent flame resistant support layer for said foam, preferably a glass cloth layer.
    Type: Grant
    Filed: September 30, 1987
    Date of Patent: April 18, 1989
    Assignee: Bisco Products Inc.
    Inventors: James S. Anderson, Kenneth S. Hoffman, Jeffrey E. Julis, Malinda Mercado