Patents by Inventor Harold D. Hankinson

Harold D. Hankinson 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).

  • Apparatus for making glass fibers
    Patent number: 4003730
    Abstract: A heating unit for converting batch mineral material to molten glass is disclosed. The unit includes a receptacle for the flowable material, heating elements for supplying heat to the flowable material, and movably mounted bus bars for supplying electrical energy to the heating elements, where the bus bars are movable to accommodate the expansion and contraction of the heating elements.
    Type: Grant
    Filed: September 26, 1975
    Date of Patent: January 18, 1977
    Assignee: Owens-Corning Fiberglas Corporation
    Inventors: William C. Brady, Arthur S. Warner, Harold D. Hankinson