Patents by Inventor Francis Nativel

Francis Nativel 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).

  • Apparatus and process for flushing a simulated moving bed comprising at least two fluid distribution lines
    Patent number: 6017448
    Abstract: An apparatus and process are described for simulated moving bed separation in which line containing fluid containing the desired product is flushed at least once by a secondary fluid entering each distribution plate or by a fluid leaving each of said plates during at least a portion of a period of time between two successive permutations of the principal supply lines and the principal extraction lines, or during the entirety of said periods, the secondary fluid being selected from the group formed by the solvent, the fluid containing the desired product and the fluid containing the desired product freed of at least a portion of the solvent.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: January 25, 2000
    Assignee: Institut Francasis du Petrole
    Inventors: Gerard Hotier, France Chopinet, Robert Jacob, Francis Nativel
  • Apparatus and process for flushing a simulated moving bed comprising at least two fluid distribution lines
    Patent number: 5882523
    Abstract: An apparatus and process are described for simulated moving bed separation in which line containing fluid containing the desired product is flushed at least once by a secondary fluid entering each distribution plate or by a fluid leaving each of said plates during at least a portion of a period of time between two successive permutations of the principal supply lines and the principal extraction lines, or during the entirety of said periods, the secondary fluid being selected from the group formed by the solvent, the fluid containing the desired product and the fluid containing the desired product freed of at least a portion of the solvent.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: March 16, 1999
    Assignee: Institut Francais du Petrole
    Inventors: Gerard Hotier, France Chopinet, Robert Jacob, Francis Nativel