Patents by Inventor Egbert Ristau

Egbert Ristau 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).

  • Patent number: 4720456
    Abstract: Anionic, surface-active trehalose lipids, in which different organic acids are bound to a trehalose molecule by an ester linkage, are prepared by aerobically cultivating trehalose-producing microorganisms, capable of assimilating hydrocarbons, under growth-limiting conditions, but without limiting the oxygen.
    Type: Grant
    Filed: August 20, 1986
    Date of Patent: January 19, 1988
    Assignee: Wintershall AG
    Inventors: Fritz Wagner, Egbert Ristau, Zu-yi Li, Siegmund Lang, Walther Schulz, Hans-Jurgen Hofmann, Kai-Udo Sewe, Walter Lindorfer