Patents by Inventor Steffen Kruppa

Steffen Kruppa 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).

  • Rhenium-oxo-porphyrin complexes
    Patent number: 4987226
    Abstract: Rhenium-oxo complexes withoctaethyl porphyrin or5,10,15,20-tetraphenyl porphyrins or5,10,15,20-tetra(4-pyridyl)-porphyrins as ligandswhich optionally carry an anion on the central atom. Methods of preparing the complexes are also disclosed.
    Type: Grant
    Filed: July 18, 1990
    Date of Patent: January 22, 1991
    Assignee: Degussa Aktiengesellschaft
    Inventors: Johann Buchler, Steffen Kruppa, Manfred Schmidt, Guenter Prescher