Patents by Inventor Wayne D. Wimbish

Wayne D. Wimbish 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).

  • Silver bath waste treatment apparatus and method
    Patent number: 5409582
    Abstract: Apparatus and methods for removing silver and copper ions from purge streams from silver replacement processes by separately electrowinning silver and copper where silver removal is first effected in an electrowinning cell having a cathode/calomel reference electrode potential between -0.1 and -0.4 volts DC followed by copper removal effected in an electrowinning cell having a cathode/calomel reference electrode potential less than -0.5 volts DC. By this method formation of copper (+1) is prevented in the presence of high concentrations of silver, thus minimizing precipitation of silver metal and formation of copper (+2).
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: April 25, 1995
    Assignee: Monsanto Company
    Inventors: Wayne D. Wimbish, Richard C. Hallcher