Patents by Inventor Jean-Jacques Girerd

Jean-Jacques Girerd 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).

  • Bleach catalysts and formulations containing them
    Patent number: 6649582
    Abstract: The present invention relates to new macrocyclic bleach catalysts, to formulations comprising these catalysts, as well as bleaching processes which employ these catalysts. These catalysts exhibit unexpected hydrolytic stability, as well as stability against metal abstraction by metal abstracting agents.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: November 18, 2003
    Assignee: Unilever Patent Holdings B.V.
    Inventors: Frédéric Banse, Riccardo F. Carina, Michel G. J. Delroisse, Jean-Jacques Girerd, Ronald Hage, Jalila A. Simaan, David Tetard
  • Process for the delignifcation and bleaching of a lignocellulose material
    Patent number: 5630906
    Abstract: A method is provided for delignifying and bleaching a lignocellulose material, wherein an aqueous solution of a redox catalyst and an oxidant is reacted with the material. The catalyst comprises an organometallic cation of the general formula [(1)Mno.sub.2 Mn(L)].sup.n+, wherein Mn is manganese (III) or (IV) oxide, the two Mn's of this cation may form a pair in a III-III, III-IV or IV-IV oxidative state, n is 2, 3 or 4, O is oxygen, and L is a ligand comprising 4 nitrogen atoms co-ordinating the manganese.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: May 20, 1997
    Assignee: Elf Aquitaine Production
    Inventors: Jean-Fran.cedilla.ois Boe, Jean-Jacques Girerd, Claude Guignard, Jean-Louis Seris, Jean-Baptiste Verlhac