Patents by Inventor Takafumi KIKUTAKE

Takafumi KIKUTAKE 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).

  • Nickel-based alloy
    Patent number: 10513756
    Abstract: The Ni-based alloy exhibits superior grain boundary corrosion resistance including C: 0.005 to 0.03 mass %, Si: 0.02 to 1 mass %, Mn: 0.02 to 1 mass %, P: not more than 0.03 mass %, S: not more than 0.005 mass %, Cr: 18 to 24 mass %, Mo: 8 to 10 mass %, Nb: 2.5 to 5.0 mass %, Al: 0.05 to 0.4 mass %, Ti: not more than 1 mass %, Fe: not more than 5 mass %, N: not more than 0.02 mass %, and Ni as a remainder and inevitable impurities. The C concentration range, the ratio of (Nb, Ti) C carbides to all carbides is not less than 90%, and the number of (Nb, Ti) C carbides satisfies the following formula: ?30×T+37220=<number of (Nb, Ti) C carbides (number/mm2)=<?7.7×T2+15700×T?7866000 under a condition of 2000×% C+890=<T(temperature ° C.)=<1150.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: December 24, 2019
    Assignee: NIPPON YAKIN KOGYO CO., LTD.
    Inventors: Takafumi Kikutake, Fugao Wei
  • NICKEL-BASED ALLOY
    Publication number: 20190078178
    Abstract: The Ni-based alloy exhibits superior grain boundary corrosion resistance including C: 0.005 to 0.03 mass %, Si: 0.02 to 1 mass %, Mn: 0.02 to 1 mass %, P: not more than 0.03 mass %, S: not more than 0.005 mass %, Cr: 18 to 24 mass %, Mo: 8 to 10 mass %, Nb: 2.5 to 5.0 mass %, Al: 0.05 to 0.4 mass %, Ti: not more than 1 mass %, Fe: not more than 5 mass %, N: not more than 0.02 mass %, and Ni as a remainder and inevitable impurities. The C concentration range, the ratio of (Nb, Ti) C carbides to all carbides is not less than 90%, and the number of (Nb, Ti) C carbides satisfies the following formula: ?30×T+37220=<number of (Nb, Ti) C carbides (number/mm2)=<?7.7×T2+15700×T?7866000 under a condition of 2000×% C+890=<T(temperature ° C.)=<1150.
    Type: Application
    Filed: August 28, 2018
    Publication date: March 14, 2019
    Applicant: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Takafumi KIKUTAKE, Fugao WEI