Patents by Inventor Yoshikazu Ro

Yoshikazu Ro 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).

  • Chromium-Base Alloy and a Production Process Therefor
    Publication number: 20080124241
    Abstract: A chromium-base alloy characterized by containing titanium within a range from 0.002 t0 1.5 mass %, with the balance comprising chromium and inevitable impurities, and being produced by melting or casting only. A chromium-base alloy that can be obtained by melting only, has room temperature ductility and a good workability, and has excellent high temperature strength and oxidation resistance even at a high temperature of about 1300° C., as well as a production process therefor are provided.
    Type: Application
    Filed: January 11, 2006
    Publication date: May 29, 2008
    Inventors: Yuefeng Gu, Hiroshi Harada, Yoshikazu Ro, Eisuke Bannai
  • Highly ductile chromium alloy containing silver
    Publication number: 20070003428
    Abstract: A chromium alloy, characterized in that it has a composition which has silver in a content of 0.002 to 5 atomic % and the balance of chromium and inevitable impurities is proposed. The chromium alloy is novel, and retains high melting point, excellent resistance to corrosion and oxidation, excellent thermal conductivity and the like, which are inherent in a chromium base alloy, and also exhibits good ductility at room temperature, and thus can be practically used as an alternative for a Ni base alloy.
    Type: Application
    Filed: October 6, 2004
    Publication date: January 4, 2007
    Inventors: Yuefeng Gu, Hiroshi Harada, Yoshikazu Ro
  • High-melting superalloy and method of producing the same
    Publication number: 20040211492
    Abstract: A high-melting superalloy made of iridium or rhodium or both thereof as a base and containing at least nickel together with at least one a metal selected from the metal group consisting of titanium, zirconium, hafnium, vanadium, niobium, and tantalum, wherein at least both phases of an fcc phase and an LI2 phase are formed in the texture, and an amount of the LI2 phase from 20 to 80% by volume.
    Type: Application
    Filed: December 8, 2003
    Publication date: October 28, 2004
    Inventors: Yoko Mitarai, Yuefeng Gu, Xihong Yu, Yoshikazu Ro, Shizuo Nakazawa, Hiroshi Harada
  • Cr-base heat resisting alloy
    Patent number: 6692587
    Abstract: There is provided a Cr-base heat resisting alloy, which contains Cr as a main component element and at least one element selected from the group consisting of Re and W in amount of from 1 atomic % to 40 atomic %.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: February 17, 2004
    Assignee: National Institute for Materials Science
    Inventors: Yoshikazu Ro, Hiroshi Harada, Yutaka Koizumi, Toshiharu Kobayashi, Eisuke Bannai
  • High-melting superalloy and method of producing the same
    Publication number: 20030136478
    Abstract: A high-melting superalloy made of iridium or rhodium or both thereof as a base and containing at least nickel together with at least one a metal selected from the metal group consisting of titanium, zirconium, hafnium, vanadium, niobium, and tantalum, wherein at least both phases of an fcc phase and an LI2 phase are formed in the texture, and an amount of the LI2 phase from 20 to 80% by volume.
    Type: Application
    Filed: February 1, 2000
    Publication date: July 24, 2003
    Inventors: Yoko Mitarai, Yuefeng Gu, Xihong Yu, Yoshikazu Ro, Shizuo Nakazawa, Hiroshi Harada
  • Iridium-containing nickel-base superalloy
    Patent number: 6494971
    Abstract: An iridium-containing nickel-base superalloy which has an orderly arrayed allow structure to be strengthened by precipitation and contains iridium dissolved in the &ggr; and &ggr;′ phases to be strengthened by solid solution, thus being improved in high-temperature strength and resistance to high-temperature corrosion.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: December 17, 2002
    Assignee: National Research Institute for Metals
    Inventors: Toshiharu Kobayashi, Yutaka Koizumi, Hideyuki Murakami, Yoshikazu Ro, Yoko Yamabe, Shizuo Nakazawa, Hiroshi Harada, Toshihiro Yamagata
  • Cr-base heat resisting alloy
    Publication number: 20020129878
    Abstract: There is provided a Cr-base heat resisting alloy, which contains Cr as a main component element and at least one element selected from the group consisting of Re and W in amount of from 1 atomic % to 40 atomic %.
    Type: Application
    Filed: March 6, 2002
    Publication date: September 19, 2002
    Inventors: Yoshikazu Ro, Hiroshi Harada, Yutaka Koizumi, Toshiharu Kobayashi, Eisuke Bannai
  • Refractory superalloys
    Patent number: 6071470
    Abstract: Refractory superalloys consist essentially of a primary constituent selected from the group consisting of iridium, rhodium, and a mixture thereof, and one or more additive elements selected from the group consisting of niobium, tantalum, hafnium, zirconium, uranium, vanadium, titanium and aluminum, and the superalloys having a microstructure containing an FCC-type crystalline structure phase and an L1.sub.2 -type crystalline structure phase are precipitated. Preferably the amount of additive element(s) is 2 to 22 atom %.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: June 6, 2000
    Assignee: National Research Institute For Metals
    Inventors: Yutaka Koizumi, Yoko Yamabe, Yoshikazu Ro, Tomohiro Maruko, Shizuo Nakazawa, Hideyuki Murakami, Hiroshi Harada