Patents by Inventor Bernd Donnerhak

Bernd Donnerhak 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).

  • Test cell for identifying deactivated surface areas of an electrode
    Patent number: 4963244
    Abstract: Process for the visual inspection of an electrode (anode) having an activated layer for electrogalvanizing plants for steel bands in which the electrode to be tested is inserted between anode and cathode of a sodium sulfate electrolytic cell with the surface to be tested facing toward the cathode. After a voltage is applied the development of the gas bubbles on the activated layer is monitored by means of a video camera.
    Type: Grant
    Filed: January 23, 1990
    Date of Patent: October 16, 1990
    Assignee: Heraeus Elektroden GmbH
    Inventors: Stephan Kotowski, Bernd Busse, Bernd Donnerhak
  • Inspection of electrodes having activated layers
    Patent number: 4919766
    Abstract: Process for the visual inspection of an electrode (anode) having an activated layer for electrogalvanizing plants for steel bands in which the electrode to be tested is inserted between anode and cathode of a sodium sulfate electrolytic cell with the surface to be tested facing toward the cathode. After a voltage is applied the development of the gas bubbles on the activated layer is monitored by means of a video camera.
    Type: Grant
    Filed: September 6, 1989
    Date of Patent: April 24, 1990
    Assignee: Heraeus Elektroden GmbH
    Inventors: Stephan Kotowski, Bernd Busse, Bernd Donnerhak