Patents by Inventor Robert R. Griffin

Robert R. Griffin 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 graphite electrode nipple
    Patent number: 4998709
    Abstract: The present invention resides in improved graphite nipples which are suitable for connecting graphite electrodes. The graphite nipples are prepared by adding mesophase pitch-based carbon fibers into a typical nipple extrusion blend.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: March 12, 1991
    Assignee: Conoco Inc.
    Inventors: Robert R. Griffin, Keith M. Roussel, Ta-Wei Fu