Patents by Inventor Wilfred P. Levesque

Wilfred P. Levesque 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).

  • Ion pump
    Patent number: 4460317
    Abstract: An ion pump is described which includes a vacuum housing, a unique, readily removable and replaceable magnet system which makes it possible to measure leakage current alone and a unique, readily removable and replaceable reactive metal cathode for reacting with gaseous ions impinging thereon for their collection. It also includes a novel tandem sputter shielding arrangement for preventing deposition of sputter products on the anode insulator. Both power supply and current metering means which may be mounted on and directly connected to the ion pump are also described.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: July 17, 1984
    Assignee: Kernco, Inc.
    Inventors: Robert H. Kern, Wilfred P. Levesque