Patents by Inventor Norbert Winkhofer

Norbert Winkhofer 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).

  • Method for preparing nonreactive aminosilicone oils
    Patent number: 6093841
    Abstract: A method for preparing nonreactive aminosilicone oils by base-catalyzed equilibration, which entails reacting at least an organosilicon compound with at least one cyclic organosilicon compound in the presence of a basic catalyst in a first step; and in a second step reacting the reaction mixture produced in the first step, in the presence of water, with at least one organosilicon compound.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: July 25, 2000
    Assignee: Degussa-Huels Aktiengesellschaft
    Inventors: Norbert Winkhofer, Holger Rautschek, Maria Beinert, Leonore Jentsch
  • Water-soluble cobalt catalysts, process for their preparation and their use as hydro-formylation catalysts in a two-phase system with polyethylene glycol as the polar phase
    Patent number: 5840993
    Abstract: The invention relates to cobalt carbonyl catalysts of the formula (I) ##STR1## where R is --CH(CH.sub.2 OCH.sub.2 CH.sub.3).sub.2 or --C.sub.2 H.sub.4 (OCH.sub.2 CH.sub.2).sub.n OY, with n=1 to 12 and Y=H or CH.sub.3, and also a process for their preparation and their use as hydroformylation catalysts.
    Type: Grant
    Filed: February 26, 1998
    Date of Patent: November 24, 1998
    Assignee: Hoechst AG
    Inventors: Uwe Ritter, Norbert Winkhofer, Herbert Roesky