Patents by Inventor Bernard Chaufer

Bernard Chaufer 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).

  • Inorganic filtering material modified with organomineral grafting and preparation method
    Patent number: 6596173
    Abstract: The invention concerns an inorganic filtering membrane characterized in that it comprises a support made of an inorganic material coated with at least a membrane separating layer consisting of metal hydroxide and/or oxide particles and at the surface of which organomineral and/or mineral units are covalently grafted. The invention also concerns a method for preparing said membranes and their use for filtering.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: July 22, 2003
    Assignee: Orelis
    Inventors: Bernard Chaufer, Jun Kong Liou, Anne Bouguen, Murielle Rabiller-Baudry, Luc Millesime
  • Inorganic ultrafiltration of microfiltration membrane modified by a hydrophilic polymer, its preparation process and its use for the separation of proteins
    Patent number: 4992178
    Abstract: The invention relates to inorganic ultrafiltration or microfiltration membranes, which are modified by adsorbing on one of the faces of said membrane at least one hydrophilic polymer or copolymer, such as polyvinylpyrrolidone or polyvinylimidazole. The inorganic membrane can comprise a macroporous support coated with a microporous metal oxide layer, such as zirconia or alumina.These membranes (3) can be used in the ultrafiltration apparatus (1) for carrying out the separation of proteins such as proteins of latoserum, bovine serum albumin or lysozyme.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: February 12, 1991
    Assignees: Tech-Sep, Electricite de France (Service National)
    Inventors: Bernard Chaufer, Jacqueline Dulieu, Sebille