Patents by Inventor Toshiharu Hirama

Toshiharu Hirama 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 SEAMLESS STEEL PIPE AND METHOD FOR MANUFACTURING SAME
    Publication number: 20230055650
    Abstract: Provided herein is a high-strength seamless steel pipe, and a method for manufacturing same. A high-strength seamless steel pipe of the present invention has a yield strength of 758 MPa or more, and a KILIMIT value of 23.0 MPa?m or more as an evaluation index of sulfide stress corrosion cracking resistance.
    Type: Application
    Filed: November 24, 2020
    Publication date: February 23, 2023
    Applicant: JFE Steel Corporation
    Inventors: Mitsuhiro Okatsu, Masao Yuga, Toshiharu Hirama
  • HIGH-STRENGTH SEAMLESS STEEL PIPE AND METHOD FOR MANUFACTURING SAME
    Publication number: 20230023397
    Abstract: Provided herein is a high-strength seamless steel pipe, and a method for manufacturing same. A high-strength seamless steel pipe of the present invention has a steel microstructure with a prior austenite grain size of 11.0 or more in terms of a grain size number in compliance with ASTM E112, and has a yield strength of 862 MPa or more and 965 MPa or less.
    Type: Application
    Filed: November 24, 2020
    Publication date: January 26, 2023
    Applicant: JFE Steel Corporation
    Inventors: Mitsuhiro Okatsu, Masao Yuga, Toshiharu Hirama