Patents by Inventor Hajime Shimoyama

Hajime Shimoyama 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 making ejection powder for mechanical plating
    Patent number: 5547488
    Abstract: Ejection material in powder form used in mechanical plating, each particle of the ejection material being made of an iron alloy core covered with a zinc alloy layer and conducted with thermal treatment at a temperature between 300.degree. and 700.degree. C. so that the zinc alloy layer has the Vicker's hardness of 60 to 370.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: August 20, 1996
    Assignee: Dowa Iron Powder Co., Ltd.
    Inventors: Masatsugu Watanabe, Yasuhisa Nagano, Hajime Shimoyama, Tomohiro Osaka
  • Mechanical plating method for forming a zinc alloy film by ejecting heat treated powder
    Patent number: 5354579
    Abstract: Mechanical plating method for forming a zinc alloy film by ejecting powder onto a surface. Ejection powder is made by mixing iron or iron alloy nuclei with zinc alloy melt, cooling to form a solidified alloy, and crushing. The ejection powder is then heat treated between 300.degree. C. and 700.degree. C. to adjust the Vicker's hardness of the zinc alloy to between 60 and 370.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: October 11, 1994
    Assignee: Dowa Iron Powder Co., Ltd.
    Inventors: Masatsugu Watanabe, Yasuhisa Nagano, Hajime Shimoyama, Tomohiro Osaka