Patents by Inventor Tomohiro Takida

Tomohiro Takida 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).

  • Publication number: 20210008625
    Abstract: A molybdenum material having a diameter of 75 mm or more and a length of 250 mm or more, and having a relative density of 99.5% or more.
    Type: Application
    Filed: March 20, 2019
    Publication date: January 14, 2021
    Applicant: A.L.M.T. Corp.
    Inventors: Akihiro YOSHIDA, Takanori KADOKURA, Tomohiro TAKIDA
  • Patent number: 10777403
    Abstract: A tungsten electrode material contains a tungsten-based material and oxide particles dispersed in the tungsten-based material. The oxide particles are composed of an oxide solid solution in which a Zr oxide and/or an Hf oxide and an oxide of at least one rare earth selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu are dissolved as a solid solution. A content of the rare-earth oxide with respect to a total amount of the Zr oxide and/or the Hf oxide and the rare-earth oxide is not lower than 66 mol % and not higher than 97 mol %, a content of the oxide solid solution is not lower than 0.5 mass % and not higher than 9 mass %, and the remainder is composed substantially of tungsten.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: September 15, 2020
    Assignee: A.L.M.T. Corp.
    Inventors: Seiji Nakabayashi, Tomohiro Takida
  • Publication number: 20200066505
    Abstract: A tungsten electrode material contains a tungsten-based material and oxide particles dispersed in the tungsten-based material. The oxide particles are composed of an oxide solid solution in which a Zr oxide and/or an Hf oxide and an oxide of at least one rare earth selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu are dissolved as a solid solution. A content of the rare-earth oxide with respect to a total amount of the Zr oxide and/or the Hf oxide and the rare-earth oxide is not lower than 66 mol % and not higher than 97 mol %, a content of the oxide solid solution is not lower than 0.5 mass % and not higher than 9 mass %, and the remainder is composed substantially of tungsten.
    Type: Application
    Filed: March 23, 2018
    Publication date: February 27, 2020
    Applicant: A.L.M.T. Corp.
    Inventors: Seiji NAKABAYASHI, Tomohiro TAKIDA
  • Publication number: 20140308536
    Abstract: There is provided a flat plate-like sintered tungsten alloy that can be molded into a complex shape by press working or forge processing. The flat plate-like sintered tungsten alloy contains 85% by mass or more and 98% by mass or less of W, 1.4% by mass or more and 11% by mass or less of Ni, and 0.6% by mass or more and 6% by mass or less of at least one substance selected from the group consisting of Fe, Cu and Co, wherein an elongation percentage of the flat plate-like sintered tungsten alloy in a planar direction is 20% or more.
    Type: Application
    Filed: November 27, 2012
    Publication date: October 16, 2014
    Applicant: A.L.M.T. Corp
    Inventors: Gouhei Toyoshima, Noboru Uenishi, Norihito Goma, Satoshi Umemoto, Takanori Kadokura, Tomohiro Takida, Kazunaga Sakakibara
  • Publication number: 20140014235
    Abstract: Provided is an industrially advantageous molybdenum material which is capable of causing secondary recrystallization to occur at a temperature lower than conventional and which, after the secondary recrystallization, can have a structure that comprises giant crystal grains with less grain boundaries and thus is excellent in creep resistance. The molybdenum material has, in at least a part thereof, a portion having a region where the peak intensities of the (110) and (220) diffraction planes are each less than the peak intensity of the (211) diffraction plane, as measured by X-ray diffraction, in a region at a depth of one-fifth of the entire thickness in a plate thickness direction from a surface.
    Type: Application
    Filed: January 11, 2012
    Publication date: January 16, 2014
    Applicant: A.L.M.T. CORP.
    Inventors: Takanori Kadokura, Tomohiro Takida
  • Patent number: 7442225
    Abstract: The present invention provides a worked molybdenum-alloy material that can be used at higher temperatures than at least temperatures at which known TZM alloys are used. A worked molybdenum-alloy material having high strength and high toughness includes at least one of carbide particles, oxide particles, and boride particles and fine nitride particles dispersed by internal nitriding of an untreated worked molybdenum-alloy material in which a nitride-forming-metal element is dissolved to form a solid solution in a molybdenum matrix and at least one of carbide particles, oxide particles, and boride particles is precipitated and dispersed.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: October 28, 2008
    Assignees: Japan Science and Technology Agency, National University Corporation Okayama University, A.L.M.T. Corp.
    Inventors: Jun Takada, Masahiro Nagae, Makoto Nakanishi, Tomohiro Takida, Tetsushi Hoshika
  • Publication number: 20060054247
    Abstract: The present invention provides an innovative material which has properties which cannot be achieved with conventional materials, i.e., having satisfactory high corrosion resistance and high strength in very severe corrosive conditions, for example, a 75% sulfuric acid (H2SO4) aqueous solution (180° C.) in addition to high strength at high temperatures and high toughness at low temperatures, and provides a method for effectively manufacturing the innovative material.
    Type: Application
    Filed: March 27, 2003
    Publication date: March 16, 2006
    Inventors: Jun Takada, Masahiro Nagae, Makoto Nakanishi, Tomohiro Takida
  • Publication number: 20060048866
    Abstract: The present invention provides a worked molybdenum-alloy material that can be used at higher temperatures than at least temperatures at which known TZM alloys are used. A worked molybdenum-alloy material having high strength and high toughness includes at least one of carbide particles, oxide particles, and boride particles and fine nitride particles dispersed by internal nitriding of an untreated worked molybdenum-alloy material in which a nitride-forming-metal element is dissolved to form a solid solution in a molybdenum matrix and at least one of carbide particles, oxide particles, and boride particles is precipitated and dispersed.
    Type: Application
    Filed: March 27, 2003
    Publication date: March 9, 2006
    Inventors: Jun Takada, Masahiro Nagae, Makoto Nanishi, Tomohiro Takida, Tetsushi Hoshika
  • Patent number: 6595821
    Abstract: A high-quality and high-reliability rotary anode target for X-ray tubes, of which the mechanical strength at high temperatures is increased and which is applicable not only to low-speed rotation (at least 3,000 rpm) but also even to high-speed rotation at high temperatures, and also a method for producing it. The rotary anode has a two-layered structure to be formed by laminating an Mo alloy substrate that comprises from 0.2% by weight to 1.5% by weight of TiC with the balance of substantially Mo, and an X-ray generating layer of a W—Re alloy that overlies the substrate.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: July 22, 2003
    Assignee: Tokyo Tungsten Co., Ltd.
    Inventors: Masayuki Itoh, Koji Asahi, Mitsuo Osada, Yoshinari Amano, Tomohiro Takida
  • Publication number: 20010014568
    Abstract: Provided are a high-quality and high-reliability rotary anode target for X-ray tubes, of which the mechanical strength at high temperatures is increased and which is applicable not only to low-speed rotation (at least 3,000 rpm) but also even to high-speed rotation at high temperatures, and also a method for producing it. The rotary anode has a two-layered structure to be formed by laminating an Mo alloy substrate that comprises from 0.2% by weight to 1.5% by weight of TiC with the balance of substantially Mo, and an X-ray generating layer of a W—Re alloy that overlies the substrate.
    Type: Application
    Filed: April 20, 2001
    Publication date: August 16, 2001
    Inventors: Masayuki Itoh, Koji Asahi, Mitsuo Osada, Yoshinari Amano, Tomohiro Takida
  • Patent number: 6233311
    Abstract: Provided are a high-quality and high-reliability rotary anode target for X-ray tubes, of which the mechanical strength at high temperatures is increased and which is applicable not only to low-speed rotation (at least 3,000 rpm) but also even to high-speed rotation at high temperatures, and also a method for producing it. The rotary anode has a two-layered structure to be formed by laminating an Mo alloy substrate that comprises from 0.2% by weight to 1.5% by weight of TiC with the balance of substantially Mo, and an X-ray generating layer of a W—Re alloy that overlies the substrate.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: May 15, 2001
    Assignee: Tokyo Tungsters Co., Ltd.
    Inventors: Masayuki Itoh, Koji Asahi, Mitsuo Osada, Yoshinari Amano, Tomohiro Takida