Patents by Inventor Sabine Gruttner-Merten

Sabine Gruttner-Merten 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).

  • Preparation of pyridine dyes
    Patent number: 5703238
    Abstract: Methine or azamethine dyes are prepared on the basis of pyridine dyes by condensing an oxime- or formyl-pyridine or its tautomeric form with 5-membered aromatic heterocycles.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: December 30, 1997
    Assignee: BASF Aktiengesellschaft
    Inventors: Ernst Schefczik, Sabine Gruttner-Merten, Peter Saling, Rudiger Sens, Helmut Reichelt