Patents by Inventor John Albert Wardwell

John Albert Wardwell 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).

  • Seal for floating roof tank
    Patent number: 4099643
    Abstract: Auxilliary seal for a floating roof tank is provided by a plurality of superposed flexible sheet members arranged above a primary seal about the periphery of the floating roof. The flexible sheet members have outer edges which distort as the assembly passes over rivet heads, butt straps or other protrusions from the inner surface of the tank wall and thus provide the desired seal. The flexible elements also readily accommodate to deviations of the wall from truly circular.
    Type: Grant
    Filed: May 20, 1977
    Date of Patent: July 11, 1978
    Assignee: Mobil Oil Corporation
    Inventors: John Albert Wardwell, Ray Alan Stewert, Ralph Gee Chow