Patents by Inventor Manfred Pastsch

Manfred Pastsch 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).

  • Preparation of triphendioxazines
    Patent number: 4923988
    Abstract: Triphendioxazines are prepared by cyclizing benzoquinone derivatives in oleum in the presence of an organic iodine compound.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: May 8, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Uwe Nahr, Manfred Pastsch