Patents by Inventor Youichi Enokida

Youichi Enokida 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).

  • Ultrasound enhanced process for extracting metal species in supercritical fluids
    Patent number: 7128840
    Abstract: Improved methods for the extraction or dissolution of metals, metalloids or their oxides, especially lanthanides, actinides, uranium or their oxides, into supercritical solvents containing an extractant are disclosed. The disclosed embodiments specifically include enhancing the extraction or dissolution efficiency with ultrasound. The present methods allow the direct, efficient dissolution of UO2 or other uranium oxides without generating any waste stream or by-products.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: October 31, 2006
    Assignee: Idaho Research Foundation, Inc.
    Inventors: Chien M. Wai, Youichi Enokida
  • Method for separating a hydrogen isotope, and apparatus for separating the same hydrogen isotope
    Publication number: 20050163703
    Abstract: An atmosphere containing a hydrogen gas containing a hydrogen isotope, a water and a water vapor is disposed under a given condition of reduce pressure. Then, a process temperature for the atmosphere is controlled commensurate with the pressure of the atmosphere to control partial pressures of the hydrogen gas and the water vapor, and thus, control the separating performance of the hydrogen isotope from the hydrogen gas through a hydrogen-water chemical exchange reaction.
    Type: Application
    Filed: August 30, 2004
    Publication date: July 28, 2005
    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATIONAL SCIENCES
    Inventors: Takahiko Sugiyama, Yamato Asakura, Tatsuhiko Uda, Ichiro Yamamoto, Youichi Enokida
  • Ultrasound enhanced process for extracting metal species in supercritical fluids
    Publication number: 20030183043
    Abstract: Improved methods for the extraction or dissolution of metals, metalloids or their oxides, especially lanthanides, actinides, uranium or their oxides, into supercritical solvents containing an extractant are disclosed. The disclosed embodiments specifically include enhancing the extraction or dissolution efficiency with ultrasound. The present methods allow the direct, efficient dissolution of UO2 or other uranium oxides without generating any waste stream or by-products.
    Type: Application
    Filed: March 25, 2003
    Publication date: October 2, 2003
    Inventors: Chien M. Wai, Youichi Enokida