Patents by Inventor Hideaki Hohnoki

Hideaki Hohnoki 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 preparing high-purity manganese compounds
    Patent number: 4943418
    Abstract: In a method of preparing high-purity manganese compounds, wherein the method comprises adding a member selected from ferromanganese and metallic manganeses to an aqueous electrolyte-containing solution, dissolving said member while stirring and maintaining a pH of 2 to 9, and then removing insolubles by filtration and recovering solubles by precipitation, heavy metal elements as well as non-metllic elements, such as P, Si, etc. can be removed efficiently, and high-purity manganese compounds of stable quality can be prepared.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: July 24, 1990
    Assignee: Japan Metals & Chemicals Co., Ltd.
    Inventors: Koichi Kambe, Kiyoshi Matsuura, Tatsuo Seino, Yoshiyuki Kimura, Hiroshi Kemmochi, Koichi Yoshioka, Hideaki Hohnoki