Patents by Inventor Bernard Sith

Bernard Sith 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).

  • Method of making and improved scandate cathode
    Patent number: 5074818
    Abstract: An improved scandate cathode is made from a hollow cylinder of a metal that ill not react with Sc.sub.2 (WO.sub.4).sub.3. The first step in making such a cathode is to insert a metal plug at the bottom of the cylinder to a height that will allow the remaining volume of the cylinder to be filled with the reactants WO.sub.3 and Sc.sub.2 O.sub.3. Next, the reactants are heated in a vacuum to about 1100.degree. C. to form the reaction product Sc.sub.2 (WO.sub.4).sub.3. The plug is then removed from the cylinder, the cylinder is inverted, and BaH.sub.2 is added to the volume of the cylinder that had been occupied by the plug. Finally, the cylinder is heated to decompose the BaH.sub.2.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: December 24, 1991
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Louis E. Branovich, Donald W. Eckart, Gerard L. Freeman, Bernard Sith