Patents by Inventor Jean Mahenc

Jean Mahenc 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).

  • Process and apparatus for separation of solid particles or macromolecules in solution by electrofiltration
    Patent number: 4758320
    Abstract: The invention relates to a process for separating electrically charged solid particles or macromolecules contained in a solution by using a semi-permeable membrane which is specific for the separation to be carried out and by applying an electric field to reduce the concentration gradient in the immediate vicinity of the membrane. In the present invention, a plurality of semi-permeable membranes (2, 3) are arranged directly oppositely each other so as to define an alternation of low and high pressure compartments (4, 5), and periodically the direction of the electric field is reversed. The process of the invention allows increasing the exchange area while benefiting of permanently increased efficiency from the applied electric field.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: July 19, 1988
    Assignee: Centre National de la Recherche Scientifique (C.N.R.S.)
    Inventors: Victor Sanchez, Pierre Aimar, Jean Mahenc
  • Process for the separation of immunoglobulins from colostrum
    Patent number: 4582580
    Abstract: The present invention relates to a process for the separation of the immunoglobulins present in colostrum, wherein a milk of colostrum or a serum of colostrum is fractionated by liquid electrophoresis, the immunoglobulin-enriched fraction is recovered and said immunoglobulin-enriched fraction is then fractionated by ion-exchange chromatography.
    Type: Grant
    Filed: January 25, 1983
    Date of Patent: April 15, 1986
    Assignee: Fromageries Bel
    Inventors: Raymond Goudal, Philippe Huart, Victor Sanchez, Jean Mahenc