Patents by Inventor Gerhard Margraf

Gerhard Margraf 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 purifying a nitric-acid U/Pu solution
    Patent number: 4431580
    Abstract: Purifying a nitric acid solution containing U/Pu ions and contaminated by metal impurities by(a) oxidizing the U/Pu ions of the solution to the hexavalent form,(b) conducting the solution after oxidation through a cation exchanger column in which the impurities, especially americium, are retained,(c) flushing the cation exchanger column to remove impurities therefrom, which may be taken to waste processing or utilization plant.
    Type: Grant
    Filed: January 26, 1981
    Date of Patent: February 14, 1984
    Assignee: Alkem GmbH
    Inventors: Volker Schneider, Gerhard Margraf, Wolf-Gunther Druckenbrodt