Patents by Inventor William R. Penland

William R. Penland 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).

  • Double-wall underground container for storing liquids and leak detecting means therefor
    Patent number: 4561292
    Abstract: An aboveground reservoir is connected to the space between inner and outer tanks of an underground double-wall storage container for liquids. Leak detecting liquid fills the space between the tanks and extends to a surface level in the reservoir. Sensing means detects a drop in the level of the liquid in the reservoir and activates a signal when a leak develops in either of the inner and outer tanks.
    Type: Grant
    Filed: June 3, 1985
    Date of Patent: December 31, 1985
    Assignee: Owens-Corning Fiberglas Corporation
    Inventors: Peter J. Pugnale, John M. Clark, William R. Penland