Patents by Inventor Fernand Ketels

Fernand Ketels 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 and apparatus for desilvering a silver-containing solution
    Patent number: 5770034
    Abstract: An apparatus for desilvering silver-containing solutions comprises an electrolytic cell (10) having an anode (20), a cathode (30) and a reference electrode (45) positioned adjacent the cathode (30), and electrical power supply control means (41) for controlling the supply of electrical power to the anode (20) and the cathode (30). The power supply control means (41) includes means (60) for adjusting the cathode potential and control means (70) linked to said adjustment means (60) to reduce the cathode potential, at least periodically, as the desilvering process continues. The process leads to better silver adhesion on the cathode occurs, while maintaining good desilvering levels in the solution, and cathode poisoning is minimised.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: June 23, 1998
    Assignee: Agfa-Gevaert N.V.
    Inventors: Benedictus Jansen, Fernand Ketels, Paul Smet, Werner Van de Wynckel, Michiels Frank