Patents by Inventor Mark T. Thatcher

Mark T. Thatcher 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).

  • Pipe connector
    Patent number: 4601491
    Abstract: A pipe connector with helically threaded (49, 57) frustoconical pin (10) and box (30) surfaces. The connector is axially (78) snapped together, but is rotated for disengagement. Centralizing surfaces (150, 152) on each thread form abut opposing crests (62, 54) to maintain concentrically, thereby detering disengagement under bending moments.
    Type: Grant
    Filed: October 19, 1983
    Date of Patent: July 22, 1986
    Assignee: Vetco Offshore, Inc.
    Inventors: James L. Bell, Jr., Mark T. Thatcher, Brian K. Phillips, Norman Brammer, Thomas F. Sweeney