Patents by Inventor Kenneth A. Waehner

Kenneth A. Waehner 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).

  • Recovery of selenium
    Patent number: 3992511
    Abstract: A process for recovering pure selenium from metal substrates having a selenium coating thereon without impairment of the substrate for reuse which comprises substantially converting the selenium in said coating to a water-soluble selenocyanate by immersing the coated substrate in an aqueous solution of an alkali metal cyanide, removing the substrate from the resultant solution, treating the resultant solution with an acid to precipitate the selenium from the remaining liquid.
    Type: Grant
    Filed: April 14, 1972
    Date of Patent: November 16, 1976
    Assignee: Xerox Corporation
    Inventors: Kenneth A. Waehner, Anthony T. Giammarise