Patents by Inventor Kouichi Ootuka

Kouichi Ootuka 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).

  • Water-soluble soldering flux
    Patent number: 5074928
    Abstract: A water-soluble soldering flux having good solderability, removability with water, and insulation resistance comprises, as activators, a combination of tartaric acid and a hydrohalide salt of mono-, di-, or tri-ethanolamine.
    Type: Grant
    Filed: November 23, 1990
    Date of Patent: December 24, 1991
    Assignees: Nippondenso Co., Ltd., Senju Metal Industry Co., Ltd.
    Inventors: Masaki Sanji, Toshihiko Taguchi, Tomohiko Iino, Kouichi Ootuka