Patents by Inventor Kazuhiro Ohotsuka

Kazuhiro Ohotsuka 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).

  • Electrolytic zinc-nickel alloy plating solution and a method of the plating using the same
    Patent number: 5575899
    Abstract: The present invention relates to an electrolytic zinc-nickel alloy plating solution, which comprises a plating solution containing zinc chloride, nickel chloride, and potassium chloride; polyethylene glycol having a molecular weight of 400-800 as a nonionic surfactant in an amount of 0.01-1.0 gram/liter; and at least one compound selected from the group consisting of nicotinic acid, urea, thiourea, nicotinamide, thioglycolic acid and sodium thiosulfate as a compound having a lone pair of electrons in an amount of 0.001-1.0 gram/liter. When the plating solution of the present invention is used, needle-shaped stain is not caused on a plated surface and the edge of a plated steel sheet need not be trimmed because a less amount of burning is caused thereto.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: November 19, 1996
    Assignee: Kawasaki Steel Corporation
    Inventors: Hisatada Nakakoji, Kazuhiro Hasegawa, Kazuo Mochizuki, Tokumitsu Kimura, Kazuhiro Ohotsuka, Hidenori Shirai