Patents by Inventor Clauss Wulff

Clauss Wulff 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 manufacture of bis(4-hydroxyaryl)alkanes
    Patent number: 6486363
    Abstract: The present invention relates to a process for the manufacture of bis(4-hydroxyaryl)alkanes by heterogeneous acid-catalyzed reaction of aromatic hydroxy compounds with ketones in reactors connected in series, which in the direction of advancing conversion are operated with rising temperature and optionally with increasing loading.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: November 26, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Berg, Hans-Josef Buysch, Alfred Eitel, Gerhard Fennhoff, Georg Malamet, Clauss Wulff