Patents by Inventor Michael Grauel

Michael Grauel 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).

  • Arrangement for the purification of liquids by means of anodic oxidation
    Patent number: 4304647
    Abstract: An apparatus and method for the purification of liquids utilizing anodic oxidation wherein the electrodes are composed of an austenitic chromium-nickel-molybdenum steel which contains about 0.07% by weight carbon, more than about 17.0% by weight chromium, about 12.0 to 14.5% by weight nickel and about 2.5 to 4.5% by weight molybdenum. By using the electrodes of the present invention, one can avoid the precipitation of chromium which normally occurs during the purification processes of the prior art.
    Type: Grant
    Filed: November 13, 1980
    Date of Patent: December 8, 1981
    Assignee: Sachs-Systemtechnik GmbH
    Inventors: Dieter Lutz, Franz Nagler, Michael Grauel