Patents by Inventor Roy C. Flanagan

Roy C. Flanagan 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).

  • Tunnel barrier system and method of installing the same
    Patent number: 5439319
    Abstract: A tunnel barrier system for lining the interior surface of a tunnel cavity includes a first panel in facing engagement with and affixed to a first impermeable membrane. A second panel is in facing engagement with and is affixed to a second impermeable membrane. The second panel is positioned adjacent to but spaced apart from the first panel to form a cavity between the panels. A filling material is positioned within the cavity. A third impermeable membrane is in facing engagement with both the first and second impermeable membranes and extends across the cavity such that the first panel, the second panel and the cavity are rendered airtight and watertight.
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: August 8, 1995
    Assignee: Carlisle Coatings & Water Proofing, Incorporated
    Inventors: Roy C. Flanagan, G. Richard Stauffer