Patents by Inventor Christa Fuhrmann

Christa Fuhrmann 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).

  • Production of novel phosphane ligands and use in catalytical reactions
    Patent number: 7148176
    Abstract: The present invention is directed to phosphine ligands and the use of such ligands in catalytic complexes with transition metals. The catalysts may be used in a variety of reactions and are especially useful for refining halogenoaromatics.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: December 12, 2006
    Assignee: Degussa AG
    Inventors: Matthias Beller, Wilhelm Hubert Ehrentraut, legal representative, Theresia Elisabeth Ehrentraut, legal representative, Christa Fuhrmann, Alexander Zapf, Andreas Ehrentraut, deceased
  • Production of novel phosphane ligands and use in catalytical reactions
    Publication number: 20040068131
    Abstract: The invention relates to novel phosphane ligands of formula (Ia) and (Ib): (adamantyl)nP(alkyl)m(1a); (adamantyl)o(Alkyl)qP (alkylen′)P(adamantyl)r(alkyl)s (1b), wherein adamantyl represents an adamantyl radical (IIa, IIb) bonded to the phosphorous atom in position 1 or 2. The invention also relates to the production and use of the above-mentioned ligands in the presence of transitional metal compounds of the 8th. Subgroup of PSE for catalytic reactions, particularly for the refining of halogen aromatics for producing aryl olefins, dienes, diarylene, benzoic acid and acrylic acid derivatives, aryl alkanes and also amines.
    Type: Application
    Filed: July 25, 2003
    Publication date: April 8, 2004
    Inventors: Matthias Beller, Andreas Ehrentraut, Wilhelm Hubert Ehrentraut, Theresia Elisabeth Ehrentraut, Christa Fuhrmann, Alexander Zapf