Patents by Inventor Michael C. Lockwood

Michael C. Lockwood 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).

  • Diamond drag bit cutting elements
    Patent number: 5379853
    Abstract: A unitized polycrystalline composite diamond stud type drag bit cutter having no high temperature braze of a PDC wafer to a carbide stud is disclosed. The diamond cutting surface may be planar, convex, curved or a truncated cone. The unitized construction of the cutter eliminates the problems associated with the high temperature brazing of a PDC wafer to a carbide stud.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: January 10, 1995
    Assignee: Smith International, Inc.
    Inventors: Michael C. Lockwood, Richard H. Dixon, Christopher A. Reed, Ronald B. Crockett, Kenneth W. Jones