Patents by Inventor Louis Graniou

Louis Graniou 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).

  • High temperature electric furnace with metallic resistances in the form of hollow vertical heating tubes
    Patent number: 4520487
    Abstract: A high temperature electric furnace has along its side walls vertical hollow electric resistance heating tubes (57) interconnected in serpentine fashion by conductive bridge plates (55). The tube ends and bridge plates are so contoured as to provide substantially uniform resistance along all possible current paths, thereby to avoid preferential current conduction with localized overheating. The bridge plates (55) and/or the tube ends are supported by air-cooled hollow hangers (28,45).
    Type: Grant
    Filed: March 10, 1983
    Date of Patent: May 28, 1985
    Inventor: Louis Graniou