Patents by Inventor Claus Reppenhagen

Claus Reppenhagen 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).

  • Process for producing a copper sulfate solution
    Patent number: 4251489
    Abstract: A process for extracting copper from a compact mass, such as bulk metallic copper and/or copper highly contaminated with insoluble substances, in which the mass of metallic copper is leached with a liquor containing Cu.sup.2+ ions and SO.sub.4.sup.2- ions, the liquor being oxidized separately from the leaching stage, e.g. with oxidizing agents including oxygen-containing gases such as air. At least part of the oxidized liquor is recycled to the leaching stage for the metallic copper. The copper sulfate solution which thus results is recovered.
    Type: Grant
    Filed: March 8, 1979
    Date of Patent: February 17, 1981
    Assignee: Nordeutsche Affinerie
    Inventors: Elmar Kniprath, Gerd Mrusek, Hermann Priebe, Claus Reppenhagen