Patents by Inventor René Challand

René Challand 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).

  • Catalytic hydrogenation processes
    Patent number: 7579295
    Abstract: Catalysts of formula [Ru(L)m(L?)wXY]??(II) wherein X and Y represent simultaneously or independently a hydrogen or halogen atom, a hydroxy group, or an alkoxy, carboxyl or other anionic radical, m is 1 or 2, w is 1 when m is 1 and w is 0 when m is 2, L is a phosphino-amine or phosphino-imine bidentate ligand and L? a diphosphine, are useful for the hydrogenation of substrates having a carbon-hetero atom double bond.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: August 25, 2009
    Assignee: Firmenich SA
    Inventors: Valentin Rautenstrauch, René Challand, Eric Brazi, Hubert Mimoun, Raphaël Churlaud, Robert Harold Morris, Kamaluddin Abdur-Rashid
  • Catalytic hydrogenation processes
    Patent number: 7317131
    Abstract: The catalysts of formula (II): [Ru(L)m(L?)wXY], wherein X and Y represent simultaneously or independently a hydrogen or halogen atom, a hydroxy group, or an alkoxy, carboxyl or other anionic radical, m is 1 or 2, w is 1 when m is 1 and w is 0 when m is 2, L is a phosphino-amine or phosphino-imine bidentate ligand and L? a diphosphine, are useful for the hydrogenation of substrates having a carbon-hetero atom double bond.
    Type: Grant
    Filed: September 11, 2001
    Date of Patent: January 8, 2008
    Assignee: Firmenich SA
    Inventors: Valentin Rautenstrauch, René Challand, Raphaël Churlaud, Robert Harold Morris, Eric Brazi, Hubert Mimoun, Kamaluddin Abdur-Rashid