Patents by Inventor Franciscus Napoleon Adrianus Kerstens

Franciscus Napoleon Adrianus Kerstens 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).

  • Resonant cavity magnetron having a helical cathode
    Patent number: 4066928
    Abstract: Each of the ends of a helical cathode for a magnetron are connected to the respective end plate and supporting rod by a single collective weld.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: January 3, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Joannes Baptista Maria Adrianus Van Besouw, Egbert Bernardus Gretinus Willem Gotje, Franciscus Napoleon Adrianus Kerstens
  • Resonant cavity magnetron having a magnet system and magnetron destined for such a combination
    Patent number: 4039892
    Abstract: In a magnetron for heating purposes the poleshoes are present entirely within the vacuum space but they have each been formed from one piece of material with the axially directed pole plates by punching and deep-drawing, preferably in the form of a cylindrical sleeve having a profiled bottom.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: August 2, 1977
    Assignee: U.S. Philips Corporation
    Inventor: Franciscus Napoleon Adrianus Kerstens