Patents by Inventor Harald Dibowski

Harald Dibowski 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).

  • Guanidinium phosphanes, their production and their use
    Patent number: 6187953
    Abstract: Guanidinium phosphanes of Formula I wherein the substituents are defined as in the specification which are useful catalyst ligands for the carbon-carbon linkage reactions of the hect reaction.
    Type: Grant
    Filed: November 17, 1999
    Date of Patent: February 13, 2001
    Assignee: Celanese GmbH
    Inventors: Othmar Stelzer, Franz Peter Schmidtchen, Antonella Hessler, Michael Tepper, Harald Dibowski, Michael Riedel, Helmut Bahrmann