Patents by Inventor Bernd Diesselkamper

Bernd Diesselkamper 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 the preparation of 2,3-dihalogenoquinoxalines
    Patent number: 5777119
    Abstract: Quinoxalines are prepared by reaction of oxalic acid with an o-phenylenediamine, halogenation in the presence of a solvent and oxidation to a quinoxaline carboxylic acid derivative.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: July 7, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jens Uwe Zarnack, Bernd Diesselkamper, Wolfgang Lorenz, Jorg-Michael Borchers