Patents by Inventor Don E. Graffam

Don E. Graffam 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).

  • Structural panel
    Patent number: 4612225
    Abstract: A unitary, structural panel of a thermoplastic material and a method of forming same are disclosed. The panel includes planiform webs that traverse the full thickness dimension of the panel and define a plurality of elongated, open channels that are substantially in axial alignment with one another. One or more layers of an expanded blank are pared to form the structural panel of the invention.
    Type: Grant
    Filed: July 10, 1985
    Date of Patent: September 16, 1986
    Assignee: Signode Corporation
    Inventors: Don E. Graffam, Lawrence L. Lezon, Arthur R. Slaters, Jr.