Patents by Inventor Simon Van Duijn

Simon Van Duijn 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).

  • Method for the removal of cadmium from acid phosphate-containing aqueous media
    Patent number: 4806323
    Abstract: Cadmium is removed from an acid, phosphate-containing aqueous medium with the aid of an anion exchanger, in which process, during the removal, iodide or bromide ions are present in a quantity of 100-6000 ppm calculated with respect to the acid phosphate-containing aqueous medium.
    Type: Grant
    Filed: April 29, 1987
    Date of Patent: February 21, 1989
    Assignee: Stamicarbon B.V.
    Inventors: Tjay T. Tjioe, Simon Van Duijn, Paul Wey