Patents by Inventor E. Keith Dean

E. Keith Dean 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).

  • Thermal barrier
    Patent number: 4450660
    Abstract: A thermal barrier is provided that includes a pair of sheets made of a material such as suitable plastic, and wherein the pair of sheets interfit to form a hollow panel. Compressible cellular foam material is mounted on the outer edges of the panel. Ambient air is adapted to be removed from the interior of the panel, and dry air or inert gas is adapted to be introduced into the hollow panel. Angle clips are provided for helping to maintain the barrier in its proper assembled position.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: May 29, 1984
    Inventors: E. Keith Dean, Phillips C. Emmons