Patents by Inventor William A. Nystrom

William A. Nystrom 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).

  • Replaceable liner for a crucible
    Patent number: 4294438
    Abstract: A replaceable liner for a crucible for molten metal consists of an open-top receptacle having at least its side wall made of graphite foil formed earlier by compressing expanded graphite.
    Type: Grant
    Filed: July 30, 1980
    Date of Patent: October 13, 1981
    Assignee: The Stackpole Corporation
    Inventors: William A. Nystrom, Leo C. Lanzel, William A. Bauer
  • Graphite molding powder and method of preparation
    Patent number: 4235859
    Abstract: Vermiform graphite is compressed to produce a preform with a density of about 0.03 to 0.8 g/cc, followed by comminuting the preform to produce a graphite molding powder that will have a typical mold fill-ratio between about 7 and 10 to 1 for making molded graphite parts with a density of at least 1.1 g/cc.
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: November 25, 1980
    Assignee: Stackpole Carbon Company
    Inventors: John W. Borkowski, La Vern J. Lenze, Jr., Alan F. Campbell, William A. Nystrom