Patents by Inventor Kazunobu Okawa

Kazunobu Okawa 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 manufacturing one-sided electroplated steel sheet
    Patent number: 5084145
    Abstract: In a method for manufacturing a one-sided electroplated steel sheet by electroplating of a steel sheet in an acidic bath, an adsorption film-forming organic inhibitor is added to either (a) the electroplating solution or (b) a pickling solution used prior to electroplating and/or rinse water used for rinsing the pickled sheet in a concentration of at least 1 ppm, or it is added to (c) both the plating solution and the pickling solution and/or rinse water in a concentration of at least 0.1 ppm. The steel sheet is then passed through the inhibitor-containing solution, thereby providing a one-sided electroplated steel sheet having improved appearance and adaptability to phosphating on the unplated side.
    Type: Grant
    Filed: April 26, 1990
    Date of Patent: January 28, 1992
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Nobukazu Suzuki, Seiji Bando, Hirofumi Kurayasu, Kazunobu Okawa