Patents by Inventor Weldon S. Williamson

Weldon S. Williamson 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).

  • Filament dispenser cathode
    Patent number: 4388560
    Abstract: Thermionic cathode 12 for a plasma ion source 10 has tungsten wire 64 advanced by wheels 56 from supply 50 to take-up spool 58. In chamber 48, the active cathode region 64 acts with anode 16 to supply electrons for ionizing a fuel gas so the ions are discharged from slit 18 for acceleration, separation and implantation.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: June 14, 1983
    Assignee: Hughes Aircraft Company
    Inventors: William P. Robinson, Hugh McNulty, Jr., Robert L. Seliger, Weldon S. Williamson