Patents by Inventor Jürgen Eckstein

Jürgen Eckstein 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 selectively dissociating cyclic carboxylic acid anhydrides
    Patent number: 6884893
    Abstract: The invention relates to a method for selectively dissociating cyclic carboxylic acid anhydrides. According to the inventive method, a chiral amino alcohol with a tertiary amino group that may have a partially or completely bridged structure is used as the chiral auxiliary reagent.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: April 26, 2005
    Assignee: MERCK Patent GmbH
    Inventors: Michael Schwarz, Jürgen Eckstein
  • Ketotricyclo[5.2.1.0]decane derivatives
    Patent number: 6277357
    Abstract: The invention relates to ketotricyclo[5.2.1.0]-decane derivatives of the formula I wherein Phe is a phenyl group which is unsubstituted or substituted by 1 to 5 hydroxyl, alkyl or alkoxy groups having 1 to 10 C atoms, and their preparation and use as UV filters, in particular in cosmetic or pharmaceutical formulations.
    Type: Grant
    Filed: October 19, 1993
    Date of Patent: August 21, 2001
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Michael Schwarz, Ingeborg Stein, Ulrich Heywang, Jürgen Eckstein