Patents by Inventor Koji Kusabe

Koji Kusabe 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 treating noble metal complex ions
    Patent number: 6106589
    Abstract: An agent for treating metal ions in an aqueous solution, which comprises an anthrahydroquinone compound and a metal supported on a carbonaceous carrier.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: August 22, 2000
    Assignees: Kawasaki Kasei Chemicals Ltd., N.E. Chemcat Corporation
    Inventors: Suehide Hirata, Koji Kusabe, Hiroshi Nakamura, Kikuo Fujiwara
  • Agent for treating metal ions in an aqueous solution, process for producing the metal ion-treating agent and method for treating metal ions in an aqueous solution
    Patent number: 5474593
    Abstract: An agent for treating metal ions in an aqueous solution, comprising a solid porous carrier and, supported thereon, an organic reagent (hereinafter referred to as a "redox reagent") which is capable of converting metal ions (inclusive of metal complex ions) contained in an aqueous solution to zero valent metal or monovalent metal ions by a redox reaction and which is capable of carrying out oxidation-reduction reversibly.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: December 12, 1995
    Assignee: Kawasaki Kasei Chemicals Ltd.
    Inventors: Tatsuya Sakurai, Hiroshi Fujimura, Koji Kusabe, Keishiro Hata