Patents by Inventor Hans Boving

Hans Boving 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).

  • Refractory article for electrolysis with a protective coating made of corundum crystals
    Patent number: 4170533
    Abstract: A molten salt charge as used in the electrolysis of aluminum contains aluminum oxide in excess of the eutectic composition and is cooled at a surface colder than the melt in such a way that the aluminum oxide precipitates onto this surface in the form of corundum crystals. Such a layer of crystals provides chemical and electrical insulation to the cooling surface under the corrosive conditions produced by the charge.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: October 9, 1979
    Assignee: Swiss Aluminium Ltd.
    Inventors: Hanspeter Alder, Hans Boving
  • Protective material made of corundum crystals
    Patent number: 4049511
    Abstract: A molten salt charge as used in the electrolysis of aluminum contains aluminum oxide in excess of the eutectic composition and is cooled at a surface colder than the melt in such a way that the aluminum oxide precipitates onto this surface in the form of corundum crystals. Such a layer of crystals provides chemical and electrical insulation to the cooling surface under the corrosive conditions produced by the charge.
    Type: Grant
    Filed: May 18, 1976
    Date of Patent: September 20, 1977
    Assignee: Swiss Aluminium Ltd.
    Inventors: Hanspeter Alder, Hans Boving