Patents by Inventor James A. Giffen, Jr.

James A. Giffen, Jr. 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).

  • Method of making composite orifice for melting furnace
    Patent number: 5376329
    Abstract: A method of making a composite orifice having a tungsten core which is diffusion bonded to a molybdenum shell. Tungsten and molybdenum powders in contact with each other in a mold are isostatically pressed to form a pressed bonded composite part. The pressed, unsintered tungsten core portion of the part is then machined to the desired dimensions. The pressed composite part is then sintered to form a diffusion bonded composite orifice. The pressed and sintered molybdenum shell portion of the orifice may then be machined to the desired dimensions.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: December 27, 1994
    Assignee: GTE Products Corporation
    Inventors: Ricky D. Morgan, James A. Giffen, Jr.