Patents by Inventor Rudolf J. M. Groenen

Rudolf J. M. Groenen 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).

  • Patent number: 5514263
    Abstract: A process for the direct recovery of metallic lead from battery paste in an electrolysis unit is disclosed. The electrolysis unit consists of an anode compartment and a cathode compartment separated by an ion selective membrane. The cathode consists of a high surface area electrically conductive substrate. Solid particles of battery paste are introduced into the cathode compartment which contains a liquid electrolyte and a complexing agent. Metallic lead is electrochemically deposited on the cathode, and sulfuric acid is produced in the anode compartment.
    Type: Grant
    Filed: July 5, 1995
    Date of Patent: May 7, 1996
    Assignee: H. J. Enthoven Limited
    Inventors: Johannus B. J. Spijkerman, Rudolf J. M. Groenen