Patents by Inventor Tetsu K. Tokunaga

Tetsu K. Tokunaga 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 of precipitating uranium from an aqueous solution and/or sediment
    Patent number: 8512572
    Abstract: A method for precipitating uranium from an aqueous solution and/or sediment comprising uranium and/or vanadium is presented. The method includes precipitating uranium as a uranyl vanadate through mixing an aqueous solution and/or sediment comprising uranium and/or vanadium and a solution comprising a monovalent or divalent cation to form the corresponding cation uranyl vanadate precipitate. The method also provides a pathway for extraction of uranium and vanadium from an aqueous solution and/or sediment.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: August 20, 2013
    Assignee: U.S. Department of Energy
    Inventors: Tetsu K. Tokunaga, Yongman Kim, Jiamin Wan