Patents by Inventor Minoru Ootaguchi

Minoru Ootaguchi 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).

  • High-strength metal solidified material and acid steel and manufacturing methods thereof
    Patent number: 6332905
    Abstract: The invention according to the present application provides a high strength solidification body by solidifying a starting metallic powder of iron and the like by means of plastic working using hydrostatic pressing, which is, for instance, a high strength high toughness steel material and the like having a superfine texture comprising a crystalline texture consisting of grains 5 &mgr;m or less in average diameter, or preferably, 3 &mgr;m or less in average diameter. Furthermore, the present invention provides a steel material included in the high strength solidification body, which contains oxide grain 0.2 &mgr;m or less in diameter at a volume ratio of from 0.5 to 60%.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: December 25, 2001
    Assignees: Japan as represented by Director General of National Research Institute for Metals, Kawasaki Steel Corporation
    Inventors: Minoru Ootaguchi, Shuji Wanikawa, Yuji Muramatsu, Kaneaki Tsuzaki, Kotobu Nagai, Toru Hayashi