Patents by Inventor Frans Adrianus Staas

Frans Adrianus Staas 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).

  • Refrigeration method and apparatus by converting .sup.4 He to A superfluid
    Patent number: 3978682
    Abstract: A refrigerator operable with an evaporation chamber and superfluid .sup.4 He II for temperatures below the .lambda.-point of helium, and means for preventing the .sup.4 He II from creeping upward out of the evaporation chamber.
    Type: Grant
    Filed: February 21, 1975
    Date of Patent: September 7, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Adrianus Petrus Severijns, Frans Adrianus Staas