Patents by Inventor Karl Widding

Karl Widding 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).

  • Method for preparing active cathodes for electrochemical processes
    Patent number: 4171247
    Abstract: Improved active cathodes, prepared by cleaning and etching with nitric acid and activated by a galvanic coating in a bath containing a nickel salt and sulphur liberating component, are provided. The improvement resides in controlled etching and activation conditions.
    Type: Grant
    Filed: February 24, 1978
    Date of Patent: October 16, 1979
    Assignee: Norsk Hydro a.s.
    Inventors: Hakon Harang, Karl Widding, Knut A. Andreassen, Johan B. Holte