Patents by Inventor Shigekazu Tsurubou

Shigekazu Tsurubou 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 separating metal ions
    Patent number: 7041262
    Abstract: A method for separating metal ions, which comprises adding a selective capturing agent to an aqueous solution containing plural types of metal ions, said selective capturing agent being a cyclic compound and forming a complex with metal ions having ion radii suitable for the size of the ring alone, so that unnecessary metal ions are held by the selective capturing agent in the aqueous solution, and bringing said aqueous solution into contact with an ion exchange solid phase so as to transport desired metal ions alone to the solid phase.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: May 9, 2006
    Assignee: National Institute for Research in Inorganic Materials
    Inventors: Yu Komatsu, Shigekazu Tsurubou
  • Method for separating metal ions
    Publication number: 20030108464
    Abstract: A method for separating metal ions, which comprises adding a selective capturing agent to an aqueous solution containing plural types of metal ions, said selective capturing agent being a cyclic compound and forming a complex with metal ions having ion radii suitable for the size of the ring alone, so that unnecessary metal ions are held by the selective capturing agent in the aqueous solution, and bringing said aqueous solution into contact with an ion exchange solid phase so as to transport desired metal ions alone to the solid phase.
    Type: Application
    Filed: December 12, 2002
    Publication date: June 12, 2003
    Applicant: National Inst. for Research in Inorganic Materials
    Inventors: Yu Komatsu, Shigekazu Tsurubou
  • Method for separating metal ions
    Publication number: 20020070171
    Abstract: A method for separating metal ions, which comprises adding a selective capturing agent to an aqueous solution containing plural types of metal ions, said selective capturing agent being a cyclic compound and forming a complex with metal ions having ion radii suitable for the size of the ring alone, so that unnecessary metal ions are held by the selective capturing agent in the aqueous solution, and bringing said aqueous solution into contact with an ion exchange solid phase so as to transport desired metal ions alone to the solid phase.
    Type: Application
    Filed: March 1, 2001
    Publication date: June 13, 2002
    Applicant: National Institute for Research in Inorganic Materials
    Inventors: Yu Komatsu, Shigekazu Tsurubou