Patents by Inventor Norman C. Schroeder

Norman C. Schroeder 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 purifying bidentate organophosphorous compounds
    Patent number: 4276235
    Abstract: Bidentate organophosphorous compounds are purified of undesirable impurities by contacting a solution of the compounds with a mercuric nitrate solution to form an insoluble mercuric bidentate compound which precipitates while the impurities remain in solution. The precipitate is washed and then contacted with a mixture of an aqueous solution of a strong mercuric ion complexing agent and an organic solvent to complex the mercuric ion away from the bidentate compound which then dissolves in the solvent. The purified bidentate compounds are useful for extracting the actinide elements from aqueous acidic nuclear waste solutions.
    Type: Grant
    Filed: April 24, 1980
    Date of Patent: June 30, 1981
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Lyle D. McIsaac, Joseph F. Krupa, Norman C. Schroeder