Patents by Inventor Birgit Drieben-Hölscher

Birgit Drieben-Hölscher 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).

  • Biphenydiols
    Patent number: 6844462
    Abstract: The invention relates to the biphenyldiols of the formula (V) The corresponding racemic and enantiomerically pure triflate compounds thereof, where R1 and R2 are H, R3 is chlorine, and R4 is methoxy. In an alternate embodiment, R1 and R2 are hydrogen and R3 and R4 are C1-C4-alkoxy, fluorine, or chlorine.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: January 18, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birgit Drieben-Hölscher, Joachim Kralik, Inga Ritzkopf, Christian Steffens, Guido Giffels, Claus Dreisbach, Thomas Prinz