Patents by Inventor Adrianus Petrus Severijns

Adrianus Petrus Severijns 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).

  • .sup.3 He-.sup.4 He dilution refrigerating machine
    Patent number: 4047394
    Abstract: A .sup.3 He-.sup.4 He dilution refrigerator provided with a variable-flow restriction member in the supply duct for flowing the condensed helium into the mixing chamber, such member being controlled by the flow of condensed helium and having a flat flow passage curve.
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: September 13, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Adrianus Petrus Severijns, Franciscus Henricus Eduard Aarts
  • 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