Patents by Inventor Josef Van Lith

Josef Van Lith 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).

  • Scandate cathode
    Patent number: 5261845
    Abstract: A cathode body for an impregnated scandate cathode is obtained by compressing and sintering a mixture of tungsten powder with approximately 0.5% by weight of scandium, whereafter the body is impregnated.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: November 16, 1993
    Assignee: U.S. Philips Corporation
    Inventors: Johannes Van Esdonk, Jan Hasker, Josef Van Lith