Patents by Inventor John N. Kikkert

John N. Kikkert 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).

  • X-ray tube comprising two successive layers of anode material
    Patent number: 4622688
    Abstract: An anode of an X-ray tube, particularly for X-ray analysis, comprises at least two successive layers (7, 8 or 11, 10 or 13, 12) of anode material. A first layer (7, 11, 12) thereof consists mainly of an element having a comparatively low atomic number, such as scandium or chromium, while a second layer (8, 10, 13) consists mainly of an element having a comparatively high atomic number, such as molybdenum, tungsten or uranium. For the selection of a desired radiation spectrum, the tube voltage is selectively adjusted such that either or both layers are activated.
    Type: Grant
    Filed: May 23, 1984
    Date of Patent: November 11, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Willem H. Diemer, John N. Kikkert, Hubertus F. M. Wagemans