Patents by Inventor Ann P. Evers

Ann P. Evers 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).

  • Recovery and purification of iridium
    Patent number: 4130625
    Abstract: A method of recovering iridium from a solution thereof containing rhodium and impurities in the form of base metals comprising; oxidizing the iridium to the Ir(IV) oxidation state in an acid solution in the presence of chloride ions; removing the iridium chlorocomplexes formed using a suitable anion-exchange resin; washing the resin; treating the iridium with an aqueous solution of sulphur dioxide which is substantially free of chloride ions; and thereafter eluting the iridium complex formed from the resin using a suitable eluant.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: December 19, 1978
    Assignee: The National Institute for Metallurgy
    Inventors: Ann P. Evers, Roderick I. Edwards, Monika M. Fieberg