Patents by Inventor Stefan Geyser

Stefan Geyser 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 for the preparation of ruthenium compounds
    Patent number: 6743935
    Abstract: A process for the preparation of ruthenium compounds of the formula {Ru(dienyl)2} wherein “dienyl” represents a substituted pentadienyl or cycloheptadienyl group by reacting dichloro(2,7-dimethylocta-2,6-dien-1,8-diyl)-ruthenium with an appropriate diene in the presence of a primary or secondary alcohol capable of reducing Ru(IV) to Ru(II); and a carbonate of an alkaline material. These ruthenium compounds are useful as precursors of Ru catalysts.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: June 1, 2004
    Assignee: Firmenich SA
    Inventors: Albrecht Kurt Lutz Salzer, Frank Peter Herbert Podewils, Stefan Geyser
  • Process for the preparation of ruthenium compounds
    Publication number: 20030032828
    Abstract: A process for the preparation of ruthenium compounds of the formula {Ru(dienyl)2} wherein “dienyl” represents a substituted pentadienyl or cycloheptadienyl group by reacting dichloro(2,7-dimethylocta-2,6-dien-1,8-diyl)-ruthenium with an appropriate diene in the presence of a primary or secondary alcohol capable of reducing Ru(IV) to Ru(II); and a carbonate of an alkaline material. These ruthenium compounds are useful as precursors of Ru catalysts.
    Type: Application
    Filed: October 8, 2002
    Publication date: February 13, 2003
    Inventors: Albrecht Kurt Lutz Salzer, Frank Peter Herbert Podewils, Stefan Geyser