Patents by Inventor Manfred Kauffelt

Manfred Kauffelt 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 separating catalysts from suspensions by filtration
    Patent number: 5230804
    Abstract: The process for separating off rare metal catalysts used in the preparation of ether-carboxylic acids by catalytic oxidation with a suspended catalyst comprises carrying out a crossflow filtration and pretreating the filter elements used with a medium which is not solid under the treatment conditions and is composed of one or more carboxylic acids.
    Type: Grant
    Filed: March 17, 1992
    Date of Patent: July 27, 1993
    Assignee: Hoechst AG
    Inventors: Ernst I. Leupold, Eduard Zeisberger, Manfred Kauffelt, Willi Herzog, Udo Dettmeier, Georg Weichselbaumer