Patents by Inventor Dietmar Fiedel

Dietmar Fiedel 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).

  • Process for preparing bis-alkoxy-triazinyl-amino-containing stilbene disulphonic acids or their derivatives
    Patent number: 6248887
    Abstract: Process for the preparation of stilbene-disulphonic acids containing bis-alkoxy-triazinyl-amino, or derivatives thereof, characterized in that stilbene-disulphonic acids containing bis-chlorotriazinyl-amino, or derivatives thereof, are reacted with at least 10 molar equivalents, based on the stilbene-disulphonic acid compound, of a C1-C4-monoalkanol.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: June 19, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Feldhues, Uwe Vogt, Udo Eckstein, Rolf Brockmann, Dietmar Fiedel
  • Process for the arylation of olefins
    Patent number: 5231223
    Abstract: Substituted olefins of the formula (I) ##STR1## are prepared by reaction of a compound of the formula (II) ##STR2## with a compound of the formula (III)R--CH--CH.sub.2in the presence of an organic and/or inorganic palladium salt as a catalyst using water and/or an alcohol as a solvent, the substituents and indices being defined in the disclosure.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: July 27, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Axel Bader, Dieter Arlt, Dietmar Fiedel, Stefan Meier