Patents by Inventor David M. Riffle

David M. Riffle 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).

  • Fastening device for securing electrode joints
    Patent number: 5575582
    Abstract: Electrode joint for threadably joining two abutting carbon upper and lower electrode sections is provided with a locking pin releasably held in an upper electrode section which when released engages a groove in a lower electrode section.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: November 19, 1996
    Assignee: UCAR Carbon Technology Corporation
    Inventors: Michael Frastaci, Richard T. Lewis, David G. Proctor, David M. Riffle