Patents by Inventor Bettina Burkhardt

Bettina Burkhardt 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 production of diazonium compounds with a low content of sodium ions
    Patent number: 5986075
    Abstract: The present invention relates to a process for desalting aqueous suspensions containing an organic diazonium compound and electrolytes containing Na ions, in which the aqueous suspension is passed through a semipermeable membrane.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: November 16, 1999
    Assignees: Bayer Corporation, Bayer Aktiengesellschaft
    Inventors: John C. DuBose, Andrew D. Johnson, Samuel Shaun Murphree, Edzard Tholema, Helmut Hoffmann, Wolfgang Zarges, Wolfgang Frank, Bettina Burkhardt