Patents by Inventor Paulus A. M. Grothenhuis

Paulus A. M. Grothenhuis 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).

  • Extraction of Group 8 metals from organic solutions
    Patent number: 4680168
    Abstract: Metals of Group 8 are recovered from an organic medium by liquid-liquid extraction into an aqueous phase in the presence of a water-soluble cyclic phosphite, forming an aqueous extract phase containing the metals in complex combination with the cyclic phosphite.
    Type: Grant
    Filed: June 10, 1986
    Date of Patent: July 14, 1987
    Assignee: Shell Oil Company
    Inventors: Brian L. Goodall, Paulus A. M. Grothenhuis