Patents by Inventor Masamitsu Fujii

Masamitsu Fujii 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).

  • &agr;+&bgr; type titanium alloy, process for producing titanium alloy, process for coil rolling, and process for producing cold-rolled coil of titanium alloy
    Patent number: 6726784
    Abstract: A high strength and ductility &agr;+&bgr; type titanium alloy, comprising at least one is isomorphous &bgr; stabilizing element in a Mo equivalence of 2.0-4.5 mass %, at least one eutectic &bgr; stabilizing element in an Fe equivalence of 0.3-2.0 mass %, Si in an amount of 0.1-1.5 mass %, and C in an amount of 0.01-0.15% mass, and has a &bgr; transformation temperature no lower than 940° C.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: April 27, 2004
    Inventors: Hideto Oyama, Takayuki Kida, Kazumi Furutani, Masamitsu Fujii
  • Titanium alloy and production thereof
    Patent number: 6632304
    Abstract: A near-&bgr; or &bgr; titanium alloy having high strength, high ductility, and high toughness which is capable of coil rolling at a high temperature and recoiling for high productivity, and a process for producing said titanium alloy. The titanium alloy contains not more than 1.0% (excluding 0%) of Si alone or in combination with not more than 10% of Sn. The process comprises heating a &bgr; alloy or near-&bgr; alloy containing not more than 1.0% (excluding 0%) of Si alone or in combination with not more than 10% of Sn and subjecting said alloy to plastic deformation while keeping silicides solved in it at a temperature above the &bgr;-transus, so that silicides precipitate in the form of fine particles, with recrystallization suppressed. The resulting titanium alloy is good in workability and has high strength after aging treatment.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: October 14, 2003
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Hideto Oyama, Shinya Ishigai, Masamitsu Fujii, Tadasu Abumiya
  • Alpha + beta type titanium alloy, process for producing titanium alloy, process for coil rolling, and process for producing cold-rolled coil of titanium alloy
    Publication number: 20030089433
    Abstract: A high strength and ductility &agr;+&bgr; type titanium alloy, comprising at least one is isomorphous &bgr; stabilizing element in a Mo equivalence of 2.0-4.5 mass %, at least one eutectic &bgr; stabilizing element in an Fe equivalence of 0.3-2.0 mass %, Si in an amount of 0.1-1.5 mass %, and C in an amount of 0.01-0.15% mass, and has a &bgr; transformation temperature no lower than 940° C.
    Type: Application
    Filed: September 16, 2002
    Publication date: May 15, 2003
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO
    Inventors: Hideto Oyama, Takayuki Kida, Kazumi Furutani, Masamitsu Fujii
  • Titanium alloy and production thereof
    Publication number: 20010050117
    Abstract: A near-&bgr; or &bgr; titanium alloy having high strength, high ductility, and high toughness which is capable of coil rolling at a high temperature and recoiling for high productivity, and a process for producing said titanium alloy. The titanium alloy contains not more than 1.0% (excluding 0%) of Si alone or in combination with not more than 10% of Sn. The process comprises heating a &bgr; alloy or near-&bgr; alloy containing not more than 1.0% (excluding 0%) of Si alone or in combination with not more than 10% of Sn and subjecting said alloy to plastic deformation while keeping silicides solved in it at a temperature above the &bgr;-transus, so that silicides precipitate in the form of fine particles, with recrystallization suppressed. The resulting titanium alloy is good in workability and has high strength after aging treatment.
    Type: Application
    Filed: July 5, 2001
    Publication date: December 13, 2001
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO
    Inventors: Hideto Oyama, Shinya Ishigai, Masamitsu Fujii, Tadasu Abumiya
  • Alpha + beta type titanium alloy, process for producing titanium alloy, process for coil rolling, and process for producing cold-rolled coil of titanium alloy
    Publication number: 20010041148
    Abstract: A high strength and ductility &agr;+&bgr; type titanium alloy, comprising at least one is isomorphous &bgr; stabilizing element in a Mo equivalence of 2.0-4.5 mass %, at least one eutectic &bgr;stabilizing element in an Fe equivalence of 0.3-2.0 mass %, Si in an amount of 0.1-1.5 mass %, and C in an amount of 0.01-0.15% mass, and has a &bgr; transformation temperature no lower than 940° C.
    Type: Application
    Filed: December 4, 2000
    Publication date: November 15, 2001
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO
    Inventors: Hideto Oyama, Takayuki Kida, Kazumi Furutani, Masamitsu Fujii
  • &agr;+&bgr; type titanium alloy, a titanium alloy strip, coil-rolling process of titanium alloy, and process for producing a cold-rolled titanium alloy strip
    Patent number: 6228189
    Abstract: A high strength and ductility &agr;+&bgr; type titanium alloy, comprising at least one isomorphous &bgr; stabilizing element in a Mo equivalence of 2.0-4.5 mass %, at least one eutectic &bgr; stabilizing element in an Fe equivalence of 0.3-2.0 mass %, and Si in an amount of 0.1-1.5 mass %, and optionally comprising C in an amount of 0.01-0.15 % mass.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: May 8, 2001
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Hideto Oyama, Takayuki Kida, Kazumi Furutani, Masamitsu Fujii
  • &agr;+&bgr; type titanium alloy, a titanium alloy strip, coil-rolling process of titanium alloy, and process for producing a cold-rolled titanium alloy strip
    Patent number: RE38316
    Abstract: A high strength and ductility &agr;+&bgr; type titanium alloy, comprising at least one isomorphous &bgr; stabilizing element in a Mo equivalence of 2.0-4.5 mass %, at least one eutectic &bgr; stabilizing element in an Fe equivalence of 0.3-2.0 mass %, and Si in an amount of 0.1-1.5 mass %, and optionally comprising C in an amount of 0.01-0.15% mass.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: November 18, 2003
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Hideto Oyama, Takayuki Kida, Kazumi Furutani, Masamitsu Fujii