Patents by Inventor Hans-Frieder Listewnik

Hans-Frieder Listewnik 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).

  • Method for the biotechnological production of xylitol
    Publication number: 20050148055
    Abstract: The invention relates to a method for the biotechnological production of xylitol, in which micro-organisms capable of metabolizing xylose to xylitol are used by modifying micro-organisms such that oxidation of NADH by enzymes other than the xylose reductase is reduced or excluded, cultivating the micro-organisms in a substrate containing xylose and 10-40 grams per liter of sulfite salt, and enriching the xylitol and recovering it from the substrate.
    Type: Application
    Filed: May 15, 2003
    Publication date: July 7, 2005
    Inventors: Thomas Walther, Kai Ostermann, Hans-Frieder Listewnik, Thomas Blev, Gerhard Roedel