Patents by Inventor Pierre Roubeau

Pierre Roubeau 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).

  • Method for the production of superfluid helium under pressure at very low temperature and an apparatus for carrying out said method
    Patent number: 3992893
    Abstract: A bath of helium-4 is cooled to a temperature below the .lambda. point so as to convert the lower portion of the bath to a superfluid-helium zone. A narrow stream between a top and a bottom portion of the zone is subjected to a critical heat flux corresponding to a temperature gradient by cooling the bath in the bottom portion of the superfluid-helium zone, the temperatures thus attainable being considerably lower than the .lambda. transition point.
    Type: Grant
    Filed: February 11, 1975
    Date of Patent: November 23, 1976
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Gerard Claudet, Pierre Roubeau, Jacques Verdier
  • Windowless cryostatic device for low-temperature spectrometry
    Patent number: 3979325
    Abstract: A cryostatic device employed mainly in infrared spectrometry comprises a vertical open-topped vessel having heat-insulating reflecting walls and containing a cryogenic liquid, an outer enclosure surrounding the vessel and provided with at least one opening for establishing a communication between the external atmosphere and a region of the enclosure opposite to the lower portion of the vessel, means for introducing cryogenic liquid into the vessel and means whereby the sample to be studied is maintained in position and cooled by said cryogenic liquid.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: September 7, 1976
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Maurice Ceccaldi, Pierre Roubeau