Patents by Inventor Yasuhiro Akeda

Yasuhiro Akeda 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).

  • Tin-free steel strips useful in the manufacture of welded cans and process for making
    Patent number: 4687713
    Abstract: A tin-free steel strip comprising a steel strip, 40 to 150 mg/m.sup.2 of a metallic chromium layer on the steel surface, and 5 to 25 mg/m.sup.2 of a chromium compound containing layer thereon wherein the metallic chromium layer contains a plurality of protrusions, exhibits improved corrosion resistance and weldability and is thus useful in the manufacture of welded cans. Preferably, 1.times.10.sup.11 to 1.times.10.sup.14 protrusions having a diameter of 5 to 1000 nm at the base thereof are present per square meter of the metallic chromium layer surface. The tin-free steel strip is produced by chromium plating a steel strip in an aqueous solution containing CR.sup.6+ preferably to a weight of 40 to 140 mg/m.sup.2, subjecting the chromium plated strip to anodic electrolysis, preferably at an eectricity quantity of 0.1 to 10 C/dm.sup.2, and subjecting the strip to a cathodic treatment in an aqueous solution containing Cr.sup.
    Type: Grant
    Filed: March 14, 1986
    Date of Patent: August 18, 1987
    Assignee: Kawasaki Steel Corporation
    Inventors: Hajime Ogata, Hisatada Nakakouji, Yasuhiro Akeda, Toshio Ichida, Toshio Irie, Sachiko Otsuka