Patents by Inventor Kouichi Takeuchi

Kouichi Takeuchi 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: 20210025031
    Abstract: A titanium plate includes a chemical composition of industrial pure titanium, in which an arithmetic mean roughness Ra of a surface is 0.05 ?m or more and 0.40 ?m or less, the surface has titanium carbide regarding which a ratio between a total sum of integrated intensities Ic derived from the titanium carbide and a total sum of integrated intensities Im of all diffraction peaks derived from the titanium carbide and titanium obtained from X-ray diffractometry ((Ic/Im)×100) is 0.8% or more and 5.0% or less, a number density of asperities on the surface is 30 to 100 pieces/mm, and an average spacing of the asperities is 20 ?m or less.
    Type: Application
    Filed: April 3, 2018
    Publication date: January 28, 2021
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Hidenori TAKEBE, Kentaroh YOSHIDA, Atsuhiko KURODA, Kouichi TAKEUCHI
  • Patent number: 10822679
    Abstract: Provided is a stainless steel product having a chemical composition consisting of C: less than 0.05%, Si: 4.0 to 7.0%, Mn: 1.50% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 20.0%, Ni: 11.0 to 17.0%, Cu: 0.15 to 1.5%, Mo: 0.15 to 1.5%, Nb: 0.5 to 1.2%, Sol. Al: 0 to 0.10%, Mg: 0 to 0.01%, and balance Fe and impurities, wherein MgO.Al2O3 inclusions constitute an area fraction of 0.02% or less. This stainless steel product has excellent corrosion resistance to hot concentrated sulfuric acid of approximately 93 to 99% concentration, for example, and also is economically advantageous.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: November 3, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hideya Kaminaka, Shinya Yamamoto, Hiroshi Kamio, Kouichi Takeuchi
  • Patent number: 10744600
    Abstract: A metal plate for laser processing (such as a stainless steel plate or a titanium plate) and preferably an austenitic stainless steel plate suitable for use as a metal mask or the like which undergoes fine processing with a laser has an average grain diameter d (?m) and a plate thickness t (?m) which satisfy the equation d?0.0448·t?1.28.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: August 18, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kazuyoshi Fujisawa, Masayuki Shibuya, Kouichi Takeuchi
  • Patent number: 10227677
    Abstract: A titanium alloy including by mass %, a platinum group metal: 0.01 to 0.15% and a rare earth metal: 0.001 to 0.10%, with the balance being Ti and impurities. The titanium alloy preferably includes as a partial replacement for Ti, Co: 0.05 to 1.00% by mass, and the content of the platinum group metal is preferably in the range of 0.01 to 0.05% by mass. Furthermore, it is preferred that the platinum group metal be Pd and the rare earth metal be Y. Consequently, it is possible to provide a titanium alloy having corrosion resistance comparable to or better than that of the conventional art as well as good workability while offering an economic advantage with a lower content of platinum group metal or an advantage of less likelihood of corrosion growth originating at defects such as flaws that occurred in the surface.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: March 12, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hideya Kaminaka, Yoshihisa Yonemitsu, Satoshi Matsumoto, Kouichi Takeuchi
  • Publication number: 20180230580
    Abstract: Provided is a stainless steel product having a chemical composition consisting of C: less than 0.05%, Si: 4.0 to 7.0%, Mn: 1.50% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 20.0%, Ni: 11.0 to 17.0%, Cu: 0.15 to 1.5%, Mo: 0.15 to 1.5%, Nb: 0.5 to 1.2%, Sol. Al: 0 to 0.10%, Mg: 0 to 0.01%, and balance Fe and impurities, wherein MgO.Al2O3 inclusions constitute an area fraction of 0.02% or less. This stainless steel product has excellent corrosion resistance to hot concentrated sulfuric acid of approximately 93 to 99% concentration, for example, and also is economically advantageous.
    Type: Application
    Filed: September 30, 2015
    Publication date: August 16, 2018
    Inventors: Hideya KAMINAKA, Shinya YAMAMOTO, Hiroshi KAMIO, Kouichi TAKEUCHI
  • Patent number: 9979004
    Abstract: The clad material comprises outer layers each consisting of Ni or Ni alloy and a base layer consisting of Cu or Cu alloy, and is characterized in that peeling-off at a clad boundary is not recognized in cross section observation made after the clad material has been subjected to a 90° reverse bend test ten times, and the number of reverse bend cycles before rupture is 17 cycles or more. The clad material has with both of excellent corrosion resistance against electrolytic solution and high electric conductivity.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: May 22, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kentarou Yoshida, Daisaku Arizono, Syuji Yoshida, Hayato Kita, Kouichi Takeuchi, Masayuki Shibuya, Hideya Kaminaka
  • Patent number: 9947941
    Abstract: A titanium material for a polymer electrolyte fuel cell separator consists of, by mass %, a platinum group metal: 0.005% to 0.15% and a rare earth metal: 0.002% to 0.10%, with the balance being Ti and impurities. The titanium material of the present invention is provided with a film formed of a titanium oxide and a platinum group metal on the surface thereof. It is preferred that the film has a thickness of 50 nm or less, and that the concentration of the platinum group metal on the surface of the film is 1.5% by mass or more. With the thus formed film, the titanium material of the present invention is capable of achieving a reduction in initial contact resistance and ensuring good corrosion resistance. In the titanium material of the present invention, the rare earth metal is preferably Y, and the platinum group metal is preferably Pd.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: April 17, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hideya Kaminaka, Kentarou Yoshida, Kouichi Takeuchi, Satoshi Matsumoto
  • Publication number: 20170327915
    Abstract: A duplex stainless steel is provided that has a chemical composition comprising, by mass %, C: 0.03% or less, Si: 1.0% or less, Mn: 1.0% or less, P: 0.04% or less, S: 0.01% or less, Cu: 0.1 to 1.0%, Ni: 5.0 to 7.5%, Cr: 22.0 to 26.0%, W: 6.0 to 12.0%, N: 0.20 to 0.32%, Mo: 0.01% or less, and a balance: Fe and impurities, in which a metal micro-structure contains, by area ratio, 0.40 to 0.60 of an ?-phase, with a balance being a ?-phase and 0.01 or less of other phases.
    Type: Application
    Filed: October 23, 2015
    Publication date: November 16, 2017
    Inventors: Hiroshi KAMIO, Hideya KAMINAKA, Junko IMAMURA, Kouichi TAKEUCHI
  • Publication number: 20170239755
    Abstract: A metal plate for laser processing (such as a stainless steel plate or a titanium plate) and preferably an austenitic stainless steel plate suitable for use as a metal mask or the like which undergoes fine processing with a laser has an average grain diameter d (?m) and a plate thickness t (?m) which satisfy the equation d?0.0448·t?1.28.
    Type: Application
    Filed: April 18, 2017
    Publication date: August 24, 2017
    Inventors: Kazuyoshi FUJISAWA, Masayuki Shibuya, Kouichi Takeuchi
  • Patent number: 9680162
    Abstract: A stainless steel member for a separator of a solid polymer fuel cell has excellent cell properties with little deterioration in performance over long periods of operation without worsening of the corrosion resistance of a stainless steel separator. The stainless steel member has a stainless steel base metal, and a passive film and electrically conductive precipitates both provided on a surface of the stainless steel base metal. The electrically conductive precipitate penetrates the passive film and includes a substance originating from the stainless steel base metal. An electrically conductive layer comprising a nonmetallic electrically conductive substance is preferably provided on the surface of the passive film, and the electrically conductive layer is preferably electrically connected to the stainless steel base member through the electrically conductive precipitates.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: June 13, 2017
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hideya Kaminaka, Junko Imamura, Akira Seki, Kouichi Takeuchi
  • Patent number: 9243314
    Abstract: A high-Si content austenitic stainless steel, which exhibits stable acid resistance and excellent corrosion resistance in high-temperature and concentrated nitric acid, has a chemical composition comprising: C: at most 0.04%; Si: 2.5-7.0%; Mn: at most 10%; P at most 0.03%; S: at most 0.03%; N: at most 0.035%; sol. Al: at most 0.03%; Cr: 7-20%; Ni: 10-22%; optionally, one or more types selected from Nb, Ti, Ta and Zr: 0.05-0.7% in total; and the remainder being Fe and impurities, wherein a total amount of B1 type inclusions measured by a method according to JIS G0555 (2003) Annex 1 “Microscopic Testing for the Non-Metallic Inclusions on the Point Counting Principle” is not more than 0.03% by area %.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: January 26, 2016
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Tomoyuki Sukawa, Shinnya Yamamoto, Kouichi Takeuchi, Hayato Kita, Shuuji Yoshida, Katsuhiko Taketsu, Masayuki Shibuya
  • Publication number: 20150240332
    Abstract: To provide a titanium alloy having corrosion resistance that is as high as or higher than before, and high corrosion resistance in a bromine-ion-containing environment, the alloy being able to be manufactured at low cost. [Solution] Provided is a titanium alloy to be used in a bromine-ion-containing environment, the titanium alloy consisting of, in mass %, a platinum group element: greater than or equal to 0.01% and less than or equal to 0.10%, a rare earth element: greater than or equal to 0.001% and less than 0.02%, O: greater than or equal to 0% and less than 0.1%, and the balance: Ti and impurities. The titanium alloy may contain, instead of part of Ti, one or more selected from the group consisting of Ni, Co, Mo, V, Cr, and W. The platinum group element is desirably contained in, in mass %, greater than or equal to 0.01% and less than or equal to 0.05%. The rare earth element is desirably contained in, in mass %, greater than or equal to 0.001% and less than 0.02%.
    Type: Application
    Filed: January 24, 2014
    Publication date: August 27, 2015
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hideya Kaminaka, Hiroshi Kamio, Masaru Abe, Kouichi Takeuchi
  • Publication number: 20150167121
    Abstract: [Object] To provide a titanium alloy material containing a platinum group metal, the titanium alloy material being able to sufficiently suppress corrosion accompanying surface roughening. [Solution] Provided is a titanium alloy material including a platinum group metal. When an average value of intensity of background signals in surface mapping analysis using an EPMA surface analysis apparatus is N and N+3N1/2 is maximum intensity of the background signal of an Fe or S characteristic X-ray, an area ratio at which a signal of an Fe or S characteristic X-ray exceeding the maximum intensity is obtained is 0.1% or less.
    Type: Application
    Filed: August 12, 2013
    Publication date: June 18, 2015
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hideya Kaminaka, Kouichi Takeuchi, Hiroshi Kamio, Satoshi Matsumoto, Norio Inoue, Masaru Abe
  • Publication number: 20140294659
    Abstract: A high-Si content austenitic stainless steel, which exhibits stable acid resistance and excellent corrosion resistance in high-temperature and concentrated nitric acid, has a chemical composition comprising: C: at most 0.04%; Si: 2.5-7.0%; Mn: at most 10%; P at most 0.03%; S: at most 0.03%; N: at most 0.035%; sol. Al: at most 0.03%; Cr: 7-20%; Ni: 10-22%; optionally, one or more types selected from Nb, Ti, Ta and Zr: 0.05-0.7% in total; and the remainder being Fe and impurities, wherein a total amount of B1 type inclusions measured by a method according to JIS G0555 (2003) Annex 1 “Microscopic Testing for the Non-Metallic Inclusions on the Point Counting Principle” is not more than 0.03% by area %.
    Type: Application
    Filed: July 26, 2012
    Publication date: October 2, 2014
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Tomoyuki Sukawa, Shinnya Yamamoto, Kouichi Takeuchi, Hayato Kita, Shuuji Yoshida, Katsuhiko Taketsu, Masayuki Shibuya
  • Publication number: 20140255816
    Abstract: A titanium material for a polymer electrolyte fuel cell separator consists of, by mass %, a platinum group metal: 0.005% to 0.15% and a rare earth metal: 0.002% to 0.10%, with the balance being Ti and impurities. The titanium material of the present invention is provided with a film formed of a titanium oxide and a platinum group metal on the surface thereof. It is preferred that the film has a thickness of 50 nm or less, and that the concentration of the platinum group metal on the surface of the film is 1.5% by mass or more. With the thus formed film, the titanium material of the present invention is capable of achieving a reduction in initial contact resistance and ensuring good corrosion resistance. In the titanium material of the present invention, the rare earth metal is preferably Y, and the platinum group metal is preferably Pd.
    Type: Application
    Filed: July 19, 2012
    Publication date: September 11, 2014
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hideya Kaminaka, Kentarou Yoshida, Kouichi Takeuchi, Satoshi Matsumoto
  • Patent number: 8807806
    Abstract: An illumination device for a vehicle includes a light source and an inside handle well. The inside handle well has a lower wall, an upper wall, and an opening. The light source is arranged under the lower wall. The lower wall has a light exit portion configured such that light emitted from the light source exits therethrough and travels to an inside of the inside handle well. The upper wall has a light reflecting portion configured to reflect light exiting through the light exit portion and traveling upward in the inside handle well toward the inside handle. The opening is formed on the inner side of the interior of the vehicle.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: August 19, 2014
    Assignee: Toyota Boshoku Kabushiki Kaisha
    Inventors: Nobuki Hayashi, Kouichi Takeuchi
  • Publication number: 20140161660
    Abstract: A titanium alloy including by mass %, a platinum group metal: 0.01 to 0.15% and a rare earth metal: 0.001 to 0.10%, with the balance being Ti and impurities. The titanium alloy preferably includes as a partial replacement for Ti, Co: 0.05 to 1.00% by mass, and the content of the platinum group metal is preferably in the range of 0.01 to 0.05% by mass. Furthermore, it is preferred that the platinum group metal be Pd and the rare earth metal be Y. Consequently, it is possible to provide a titanium alloy having corrosion resistance comparable to or better than that of the conventional art as well as good workability while offering an economic advantage with a lower content of platinum group metal or an advantage of less likelihood of corrosion growth originating at defects such as flaws that occurred in the surface.
    Type: Application
    Filed: July 20, 2012
    Publication date: June 12, 2014
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hideya Kaminaka, Yoshihisa Yonemitsu, Satoshi Matsumoto, Kouichi Takeuchi
  • Publication number: 20140060428
    Abstract: A metal plate for laser processing (such as a stainless steel plate or a titanium plate) and preferably an austenitic stainless steel plate suitable for use as a metal mask or the like which undergoes fine processing with a laser has an average grain diameter d (?m) and a plate thickness t (?m) which satisfy the equation d?0.0448·t?1.28.
    Type: Application
    Filed: February 29, 2012
    Publication date: March 6, 2014
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kazuyoshi Fujisawa, Masayuki Shibuya, Kouichi Takeuchi
  • Publication number: 20130209874
    Abstract: The clad material comprises outer layers each consisting of Ni or Ni alloy and a base layer consisting of Cu or Cu alloy, and is characterized in that peeling-off at a clad boundary is not recognized in cross section observation made after the clad material has been subjected to a 90° reverse bend test ten times, and the number of reverse bend cycles before rupture is 17 cycles or more. The clad material has with both of excellent corrosion resistance against electrolytic solution and high electric conductivity.
    Type: Application
    Filed: June 2, 2011
    Publication date: August 15, 2013
    Applicant: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Kentarou Yoshida, Daisaku Arizono, Syuji Yoshida, Hayato Kita, Kouichi Takeuchi, Masayuki Shibuya, Hideya Kaminaka
  • Patent number: 8419246
    Abstract: An illumination device for a vehicle configured to illuminate an armrest on a door trim of the vehicle includes a light source and a light directing member. The light source is arranged above the armrest and has a light emitting portion configured to emit light toward the armrest. The light directing member is arranged so as to cover the light emitting portion from below. The light directing member is configured to direct the light emitted from the light emitting portion toward the armrest toward a front of the vehicle.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: April 16, 2013
    Assignee: Toyota Boshoku Kabushiki Kaisha
    Inventors: Nobuki Hayashi, Kouichi Takeuchi