Patents by Inventor Donna D. Saunders

Donna D. Saunders 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).

  • Tool joint
    Patent number: 4549754
    Abstract: A tool joint in which different tapers on the threads result in an artificial change in pitch and a radial interference and an asymmetric root cut on a larger radius than conventional API threads together with the effect of the tapered thread engagement reduces maximum stress in the thread roots and prevents over-torquing.
    Type: Grant
    Filed: June 20, 1983
    Date of Patent: October 29, 1985
    Assignee: Reed Tubular Products Company
    Inventors: Donna D. Saunders, Manmohan S. Kalsi, Gun-Shing Chen