Patents by Inventor Koh Yoshioka

Koh Yoshioka 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: 20210268770
    Abstract: There is provided a roughened nickel-plated sheet having a roughened nickel layer as an outermost surface layer on at least one surface of a metal base material, wherein the brightness L* of the surface of the roughened nickel layer is 30 to 50, the glossiness of 85° of the surface of the roughened nickel layer is 1.5 to 50.
    Type: Application
    Filed: July 19, 2019
    Publication date: September 2, 2021
    Applicant: TOYO KOHAN CO., LTD.
    Inventors: Shinichirou HORIE, Etsuro TSUTSUMI, Toshifumi KOYANAGI, Koh YOSHIOKA
  • Publication number: 20210175513
    Abstract: [Problem] To provide a laminated electrolytic foil having strength sufficient to successfully suppress tearing or ripping during manufacture, the tearing or ripping being concerned accompanying with a trend toward thinner structures in battery current collectors, and improved in handling properties during the manufacture, and also a battery using the laminated electrolytic foil. [Solution] A laminated electrolytic foil includes a first metal layer formed from Cu and a second metal layer formed from Ni or an Ni alloy, in which the first metal layer and the second metal layer are laminated together. The laminated electrolytic foil has an overall layer thickness, which is the thickness of the laminated electrolytic foil as a whole, of 3 to 15 ?m and tensile strength of 700 MPa or higher.
    Type: Application
    Filed: February 18, 2019
    Publication date: June 10, 2021
    Applicant: Toyo Kohan Co., Ltd.
    Inventors: Shinichirou HORIE, Etsuro TSUTSUMI, Toshifumi KOYANAGI, Koh YOSHIOKA
  • Publication number: 20210151824
    Abstract: A surface-treated steel sheet for a battery container includes a steel sheet, an iron-nickel diffusion layer formed on the steel sheet, and a nickel layer foamed on the iron-nickel diffusion layer and constituting the outermost layer. When the Fe intensity and the Ni intensity are continuously measured from the surface of the surface-treated steel sheet for a battery container along the depth direction with a high frequency glow discharge optical emission spectrometric analyzer, the thickness of the iron-nickel diffusion layer being the difference (D2?D1) between the depth (D1) at which the Fe intensity exhibits a first predetermined value and the depth (D2) at which the Ni intensity exhibits a second predetermined value is 0.04 to 0.31 ?m; and the total amount of the nickel contained in the iron-nickel diffusion layer and the nickel contained in the nickel layer is 10.8 to 26.7 g/m2.
    Type: Application
    Filed: January 29, 2021
    Publication date: May 20, 2021
    Inventors: Kota SADAKI, Koh YOSHIOKA
  • Patent number: 10950828
    Abstract: A surface-treated steel sheet for a battery container, including a steel sheet, an iron-nickel diffusion layer formed on the steel sheet, and a nickel layer formed on the iron-nickel diffusion layer and constituting the outermost layer, wherein when the Fe intensity and the Ni intensity are continuously measured from the surface of the surface-treated steel sheet for a battery container along the depth direction with a high frequency glow discharge optical emission spectrometric analyzer, the thickness of the iron-nickel diffusion layer being the difference between the depth at which the Fe intensity exhibits a first predetermined value and the depth at which the Ni intensity exhibits a second predetermined value is 0.04 to 0.31 ?m; and the total amount of the nickel contained in the iron-nickel diffusion layer and the nickel contained in the nickel layer is 10.8 to 26.7 g/m2.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: March 16, 2021
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Kota Sadaki, Koh Yoshioka
  • Publication number: 20210028415
    Abstract: The present invention provides a nickel-plated heat-treated steel sheet for a battery can (1), having a nickel layer with a nickel amount of 4.4 to 26.7 g/m2 on a steel sheet (11), wherein when the Fe intensity and the Ni intensity are continuously measured along the depth direction from the surface of the nickel-plated heat-treated steel sheet for a battery can, by using a high frequency glow discharge optical emission spectrometric analyzer, the difference (D2-D1) between the depth (D1) at which the Fe intensity exhibits a first predetermined value and the depth (D2) at which the Ni intensity exhibits a second predetermined value is less than 0.04 ?m.
    Type: Application
    Filed: September 11, 2020
    Publication date: January 28, 2021
    Inventors: Kota SADAKI, Koh YOSHIOKA
  • Patent number: 10873061
    Abstract: A nickel-plated heat-treated steel sheet for a battery can, having a nickel layer with a nickel amount of 4.4 to 26.7 g/m2 on a steel sheet. When the Fe intensity and the Ni intensity are continuously measured along the depth direction from the surface of the nickel-plated heat-treated steel sheet for a battery can, by using a high frequency glow discharge optical emission spectrometric analyzer, the difference between the depth at which the Fe intensity exhibits a first predetermined value and the depth at which the Ni intensity exhibits a second predetermined value is less than 0.04 ?m.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: December 22, 2020
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Kota Sadaki, Koh Yoshioka
  • Publication number: 20200321566
    Abstract: A surface-treated steel sheet, including: a steel sheet; and a nickel-cobalt-iron diffusion layer formed as an outermost surface layer on the steel sheet. When a content of Ni, a content of Co and a content of Fe of the nickel-cobalt-iron diffusion layer are determined based on a Ni intensity, a Co intensity and a Fe intensity each sequentially measured in the depth direction from the surface side of the nickel-cobalt-iron diffusion layer by a radio frequency glow discharge optical emission spectrometry, a content of Co at a specific depth position D, InCo_D, is 5% by mass or higher and a content of Fe at the specific depth position D, InFe_D, is 11% by mass or higher, the specific depth position D being a position where the Ni intensity is 0.5% of the maximum value of the Ni intensity. Also disclosed is a method for manufacturing the surface-treated steel sheet.
    Type: Application
    Filed: October 26, 2018
    Publication date: October 8, 2020
    Applicant: TOYO KOHAN CO., LTD.
    Inventors: Yuji NAKANO, Daisuke MATSUSHIGE, Koh YOSHIOKA
  • Patent number: 10665825
    Abstract: A surface-treated steel sheet for battery containers is provided. The surface-treated sheet is used to form a battery container for a battery. The battery uses a nonaqueous electrolytic solution as an electrolytic solution. The surface-treated steel sheet includes a base material made of steel and an iron-nickel diffusion layer formed by performing thermal diffusion treatment after forming a nickel plating layer at least on a surface of the base material to be located at the inner surface side of the battery container. The iron-nickel diffusion layer has an outermost layer of which a ratio of Ni and Fe is 7.5 or less as a molar ratio of Ni/Fe. The iron-nickel diffusion layer has a thickness of 0.6 ?m or more.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: May 26, 2020
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Shinichirou Horie, Tatsuo Tomomori, Koh Yoshioka
  • Publication number: 20200035960
    Abstract: A surface-treated metal plate including: a metal plate; and a nickel-cobalt binary alloy layer formed on the metal plate. When a part having a content ratio of oxygen atoms of 5 atomic % or more as measured by X-ray photoelectron spectroscopic analysis is an oxide coating film, the nickel-cobalt binary alloy layer contains the oxide coating film with a thickness of 0.5 to 30 nm on a surface thereof, and when a pressure cooker test including temperature increasing, retention for 72 hours under a water-vapor atmosphere at a temperature of 105° C. and a relative humidity of 100% RH, and temperature decreasing is performed, the amount of increase in the thickness of the oxide coating film is 28 nm or less.
    Type: Application
    Filed: March 30, 2018
    Publication date: January 30, 2020
    Applicant: TOYO KOHAN CO., LTD.
    Inventors: Yuji NAKANO, Daisuke MATSUSHIGE, Koh YOSHIOKA
  • Publication number: 20180366691
    Abstract: A nickel-plated heat-treated steel sheet for a battery can, having a nickel layer with a nickel amount of 4.4 to 26.7 g/m2 on a steel sheet. When the Fe intensity and the Ni intensity are continuously measured along the depth direction from the surface of the nickel-plated heat-treated steel sheet for a battery can, by using a high frequency glow discharge optical emission spectrometric analyzer, the difference between the depth at which the Fe intensity exhibits a first predetermined value and the depth at which the Ni intensity exhibits a second predetermined value is less than 0.04 ?m.
    Type: Application
    Filed: December 5, 2016
    Publication date: December 20, 2018
    Inventors: Kota SADAKI, Koh YOSHIOKA
  • Publication number: 20180347061
    Abstract: A surface-treated steel sheet for a battery container, including a steel sheet, an iron-nickel diffusion layer formed on the steel sheet, and a nickel layer formed on the iron-nickel diffusion layer and constituting the outermost layer, wherein when the Fe intensity and the Ni intensity are continuously measured from the surface of the surface-treated steel sheet for a battery container along the depth direction with a high frequency glow discharge optical emission spectrometric analyzer, the thickness of the iron-nickel diffusion layer being the difference between the depth at which the Fe intensity exhibits a first predetermined value and the depth at which the Ni intensity exhibits a second predetermined value is 0.04 to 0.31 ?m; and the total amount of the nickel contained in the iron-nickel diffusion layer and the nickel contained in the nickel layer is 10.8 to 26.7 g/m2.
    Type: Application
    Filed: December 5, 2016
    Publication date: December 6, 2018
    Inventors: Kota SADAKI, Koh YOSHIOKA
  • Patent number: 10030283
    Abstract: Provided is a method for producing a surface-treated steel sheet for battery containers including: a first process of forming an iron-nickel alloy plating layer on at least one side of a steel sheet; a second process of forming a nickel plating layer on the iron-nickel alloy plating layer; and a third process of performing a thermal treatment after forming the nickel plating layer to form an iron-nickel alloy layer having an outermost surface, at which a content ratio of Fe atoms is 12 to 55% by atom, on an outermost layer by thermal diffusion. The invention makes it possible to provide the method for producing the surface-treated steel sheet for battery containers that can suppress the elution of iron inside the battery when being used for a battery container, whereby the service life of the battery can be extended and battery characteristics such as discharge characteristics can be improved.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: July 24, 2018
    Assignee: TOYO KOHAN CO., LTD.
    Inventors: Shinichirou Horie, Koh Yoshioka, Kazuhiko Ishihara
  • Publication number: 20180145286
    Abstract: A surface-treated steel sheet for battery containers is provided. The surface-treated sheet is used to form a battery container for a battery. The battery uses a nonaqueous electrolytic solution as an electrolytic solution. The surface-treated steel sheet includes a base material made of steel and an iron-nickel diffusion layer formed by performing thermal diffusion treatment after forming a nickel plating layer at least on a surface of the base material to be located at the inner surface side of the battery container. The iron-nickel diffusion layer has an outermost layer of which a ratio of Ni and Fe is 7.5 or less as a molar ratio of Ni/Fe. The iron-nickel diffusion layer has a thickness of 0.6 ?m or more.
    Type: Application
    Filed: January 22, 2018
    Publication date: May 24, 2018
    Inventors: Shinichirou HORIE, Tatsuo TOMOMORI, Koh YOSHIOKA
  • Patent number: 9911948
    Abstract: There is provided a surface-treated steel sheet for battery containers. The surface-treated sheet is used to form a battery container for a battery. The battery uses a nonaqueous electrolytic solution as an electrolytic solution. The surface-treated steel sheet is characterized by the features as below. The surface-treated steel sheet includes a base material made of steel and an iron-nickel diffusion layer formed by performing thermal diffusion treatment after forming a nickel plating layer at least on a surface of the base material to be located at the inner surface side of the battery container. The iron-nickel diffusion layer has an outermost layer of which a ratio of Ni and Fe is 7.5 or less as a molar ratio of Ni/Fe. The iron-nickel diffusion layer has a thickness of 0.6 ?m or more.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: March 6, 2018
    Assignee: TOYO KOHAN CO., LTD
    Inventors: Shinichirou Horie, Tatsuo Tomomori, Koh Yoshioka
  • Patent number: 9887396
    Abstract: Provided is a surface-treated steel sheet for battery containers (100) that is obtained in such a manner that after iron-nickel alloy plating is performed on a steel sheet (10), a thermal treatment is performed and is characterized in that an outermost layer is an iron-nickel alloy layer (20), and the iron-nickel alloy layer (20) has an average crystal size of 1 to 8 ?m at the outermost surface thereof. The present invention makes it possible to provide the surface-treated steel sheet for battery containers that can suppress the elution of iron inside the battery when being used for a battery container, whereby the service life of the battery can be extended and battery characteristics such as discharge characteristics is improved, and to provide a battery container and a battery that can be obtained using the surface-treated steel sheet for battery containers.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: February 6, 2018
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Koh Yoshioka, Shinichirou Horie, Kazuhiko Ishihara
  • Patent number: 9700928
    Abstract: Provided are a pipe which exhibits corrosion resistance against vapor of fuel such as gasoline, diesel oil, bioethanol or a biodiesel fuel, a method for manufacturing the pipe, and a steel sheet for manufacturing the pipe. A method for manufacturing a pipe having a bent portion which has excellent corrosion resistance against fuel vapor includes the steps of; preparing a steel sheet for manufacturing a pipe which is characterized by having a zinc-nickel (Zn—Ni) alloy layer where a nickel content is 4 to 16 at % on at least one surface of the steel sheet; forming the steel sheet for manufacturing a pipe into a tubular shape such that the Zn—Ni alloy layer forms an inner surface of the pipe, and applying bending to the pipe such that the elongation of the bent convex portion generated at the time of bending the pipe falls within 20%.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: July 11, 2017
    Assignee: TOYO KOHAN CO., LTD.
    Inventors: Tatsuo Tomomori, Koh Yoshioka
  • Publication number: 20170033328
    Abstract: Provided are a surface-treated metal sheet which includes a nickel layer having improved corrosion resistance and a method of manufacturing a formed article. In a surface-treated metal sheet where a nickel layer is formed on a substrate, the proportion of the (200) plane to a total of the (111) plane, (200) plane, (220) plane and (311) plane with respect to the crystal plane orientations of the nickel layer is set to 40% or less. In a method of manufacturing a formed article using a surface-treated metal sheet where a nickel layer is formed on a substrate, the surface-treated metal sheet having the nickel layer where the proportion of the (200) plane to a total of the (111) plane, (200) plane, (220) plane and (311) plane is set to 40% or less with respect to the crystal plane orientations of the nickel layer is worked using a mold.
    Type: Application
    Filed: October 14, 2016
    Publication date: February 2, 2017
    Inventors: Tatsuo Tomomori, Koh Yoshioka
  • Patent number: 9498933
    Abstract: Provided are a surface-treated metal sheet which includes a nickel layer having improved corrosion resistance and a method of manufacturing a formed article. In a surface-treated metal sheet where a nickel layer is formed on a substrate, the proportion of (200) planes to a total of (111) planes, (200) planes, (220) planes and (311) planes with respect to the crystal plane orientations of the nickel layer is set to 40% or less. In a method of manufacturing a formed article using a surface-treated metal sheet where a nickel layer is formed on a substrate, the surface-treated metal sheet having the nickel layer where the proportion of (200) planes to a total of (111) planes, (200) planes, (220) planes and (311) planes is set to 40% or less with respect to the crystal plane orientations of the nickel layer is worked using a mold.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: November 22, 2016
    Assignee: TOYO KOHAN CO., LTD.
    Inventors: Tatsuo Tomomori, Koh Yoshioka
  • Publication number: 20160211489
    Abstract: Provided is a surface-treated steel sheet for battery containers (100) that is obtained in such a manner that after iron-nickel alloy plating is performed on a steel sheet (10), a thermal treatment is performed and is characterized in that an outermost layer is an iron-nickel alloy layer (20), and the iron-nickel alloy layer (20) has an average crystal size of 1 to 8 ?m at the outermost surface thereof. The present invention makes it possible to provide the surface-treated steel sheet for battery containers that can suppress the elution of iron inside the battery when being used for a battery container, whereby the service life of the battery can be extended and battery characteristics such as discharge characteristics is improved, and to provide a battery container and a battery that can be obtained using the surface-treated steel sheet for battery containers.
    Type: Application
    Filed: January 29, 2016
    Publication date: July 21, 2016
    Inventors: Koh YOSHIOKA, Shinichirou HORIE, Kazuhiko ISHIHARA
  • Publication number: 20160168657
    Abstract: Provided is a method for producing a surface-treated steel sheet for battery containers including: a first process of forming an iron-nickel alloy plating layer on at least one side of a steel sheet; a second process of forming a nickel plating layer on the iron-nickel alloy plating layer; and a third process of performing a thermal treatment after forming the nickel plating layer to form an iron-nickel alloy layer having an outermost surface, at which a content ratio of Fe atoms is 12 to 55% by atom, on an outermost layer by thermal diffusion. The invention makes it possible to provide the method for producing the surface-treated steel sheet for battery containers that can suppress the elution of iron inside the battery when being used for a battery container, whereby the service life of the battery can be extended and battery characteristics such as discharge characteristics can be improved.
    Type: Application
    Filed: April 18, 2014
    Publication date: June 16, 2016
    Inventors: Shinichirou HORIE, Koh YOSHIOKA, Kazuhiko ISHIHARA