Patents by Inventor David C. Bunnell

David C. Bunnell 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).

  • Patent number: 5513834
    Abstract: Described is in situ refining high purity elements in Groups IIA and VIB of the Periodic Table in a hermetically sealed apparatus by distilling, condensing and zone refining material within the apparatus.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: May 7, 1996
    Assignee: Johnson Matthey Electronics, Inc.
    Inventors: Gerald B. Feldewerth, Alan B. I. Bollong, David C. Bunnell