Patents by Inventor Kenya Matsuyama

Kenya Matsuyama 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).

  • Additive for use in producing spheroidal graphite cast iron
    Patent number: 6126713
    Abstract: An additive for use in producing spheroidal graphite cast iron of the present invention contains a fine particle of magnesium oxide having a purity of 90 weight % or more and at least one selected from the group consisting of a graphite-spheroidizing material, an inoculant and a graphite-spheroidizing inoculant. The fine particle of highly pure magnesium oxide increases the number of nuclei in a melt, and as a result thereof, increases the graphite spheroid count of a spheroidal graphite cast iron being produced. Another additive for use in producing spheroidal graphite cast iron of the present invention contains at least one selected from the group consisting of a graphite-spheroidizing material, an inoculant and a graphite-spheroidizing inoculant, and an oxide of a metal which has, at a temperature of a melt at a time when subjected to a graphite-spheroidizing treatment, an affinity for oxygen smaller than that of a graphite-spheroidizing element being used in the graphite-spheroidizing treatment.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: October 3, 2000
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yoshio Igarashi, Hideharu Nakano, Kenya Matsuyama, Masahiro Takahashi, Senri Okada, Masahide Kawabata, Katsuhiko Kojo, Toshiki Yoshida