Patents by Inventor Dieter Schlaefer

Dieter Schlaefer 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).

  • Removal of chlorate from caustic soda
    Patent number: 4837002
    Abstract: Chlorate is removed from aqueous caustic soda by reducing with iron pentacarbonyl and separating off the resulting iron oxide containing precipitate.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: June 6, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Schlaefer, Wolfgang Kochanek, Bernd Leutner
  • Gas-evolving metal electrode
    Patent number: 4557818
    Abstract: A gas-evolving metal electrode consists of profiles which are arranged parallel to one another in a horizontal plane and are connected to one another by means of current distributors. The profile surfaces which face the counter-electrode are curved, the curvature at the sides being more pronounced than that in the middle. The profile is terminated above by means of two lateral surfaces tangential to the curvature. The electrode is useful as an anode for mercury cells for the chloralkali electrolysis.
    Type: Grant
    Filed: July 12, 1984
    Date of Patent: December 10, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Roos, Dieter Schlaefer, Hugo Boehn, Knut Bittler, Heinz Kilthau
  • Bipolar electrodes with graphite as the carrier and their production
    Patent number: 4422921
    Abstract: Bipolar electrodes with graphite as the carrier have a layer of chromium trioxide not less than 10 .mu.m thick on both the anode face and the cathode face.The electrodes are produced by plasma-spraying chromium trioxide powder onto a graphite layer, and can be used as bipolar electrodes in alkali metal chloride electrolysis cells.
    Type: Grant
    Filed: August 16, 1982
    Date of Patent: December 27, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Roos, Hugo Boehn, Knut Bittler, Dieter Schlaefer