Patents by Inventor Takahito Itou

Takahito Itou 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).

  • Steel product for oil country tubular good
    Patent number: 7083686
    Abstract: A steel product for oil country tubular good according to the invention comprises, in mass %, 0.10% to 0.35% C, 0.10% to 0.50% Si, 0.10% to 0.80% Mn, up to 0.030% P, up to 0.010% S, 0.30% to 1.20% Cr, 0.20% to 1.00% Mo, 0.005% to 0.40% V, 0.005% to 0. 100% Al, up to 0.0100% N, up to 0.0010% H, 0 to 0.01% Ca, 0 to 0.050% Ti, 0 to 0.050% Nb, and 0 to 0.0050% B, and the balance of Fe and impurities. The Cr, Mo, and V contents and the grain size GS satisfy expression (1): 0.7?(1.5×Cr+2.5×Mo+V)?GS/10?2.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: August 1, 2006
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventor: Takahito Itou
  • Steel product for oil country tubular good
    Publication number: 20060018783
    Abstract: A steel product for oil country tubular good according to the invention comprises, in mass %, 0.10% to 0.35% C, 0.10% to 0.50% Si, 0.10% to 0.80% Mn, up to 0.030% P, up to 0.010% S, 0.30% to 1.20% Cr, 0.20% to 1.00% Mo, 0.005% to 0.40% V, 0.005% to 0. 100% Al, up to 0.0100% N, up to 0.0010% H, 0 to 0.01% Ca, 0 to 0.050% Ti, 0 to 0.050% Nb, and 0 to 0.0050% B, and the balance of Fe and impurities. The Cr, Mo, and V contents and the grain size GS satisfy expression (1): 0.7?(1.5×Cr+2.5×Mo+V)?GS/10?2.
    Type: Application
    Filed: July 22, 2005
    Publication date: January 26, 2006
    Inventor: Takahito Itou