Patents by Inventor William T. Mansell

William T. Mansell 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).

  • Membrane roofing system
    Patent number: 4803111
    Abstract: An improved membrane roofing arrangement is designed to eliminate the problem of "blistering" in prior art single membrane system.The membrane roofing arrangement comprises a perforated underlay sheet interposed between a single membrane and the roof, the perforated sheet preventing adhesion of the membrane to the roof at the non-perforated portions of the underlay sheet. In this manner, paths are provided between the membrane and roof for venting vapor to the edges of the membrane and/or suitable vents, thereby eliminating blistering of the membrane.
    Type: Grant
    Filed: February 24, 1988
    Date of Patent: February 7, 1989
    Assignee: Chadwick Industries Pty. Limited
    Inventor: William T. Mansell