Patents by Inventor Masatoshi Ichikawa
Masatoshi Ichikawa 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).
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Patent number: 10790531Abstract: This collector plate includes a peripheral edge wall that surrounds a predetermined region, and is provided on at least one surface of the collector plate, in which a surface roughness (Ra) of a first surface which is an exposed surface of the peripheral edge wall on the side of one surface, which is measured along a direction perpendicular to an extension direction of the peripheral edge wall is greater than a surface roughness (Ra) of the first surface which is measured along the extension direction of the peripheral edge wall.Type: GrantFiled: December 6, 2017Date of Patent: September 29, 2020Assignee: SHOWA DENKO K.K.Inventors: Masatoshi Ichikawa, Keizo Iseki, Kenzo Hanawa
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Patent number: 10727498Abstract: A redox flow electrode according to one aspect of the present invention is a redox flow battery electrode disposed between an ion exchange membrane and a bipolar plate, wherein the electrode includes a conductive sheet containing carbon nanotubes having an average fiber diameter of 1 ?m or less, and a porous sheet that is laminated to the conductive sheet and is formed from fibers having an average fiber diameter of greater than 1 ?m.Type: GrantFiled: December 24, 2015Date of Patent: July 28, 2020Assignee: SHOWA DENKO K.K.Inventors: Keizo Iseki, Masatoshi Ichikawa, Gaku Oriji, Kenzo Hanawa
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Patent number: 10707514Abstract: A redox flow battery is provided, including an ion-exchange membrane, a current collector plate, and an electrode that is disposed between the ion-exchange membrane and the current collector plate. The electrode includes a main electrode layer in which an electrolytic solution flows from a surface on the current collector plate side to a surface on the ion-exchange membrane side, and the main electrode layer includes a plurality of main electrode pieces which are arranged in parallel in a plane direction.Type: GrantFiled: January 30, 2018Date of Patent: July 7, 2020Assignee: SHOWA DENKO K.K.Inventors: Kenzo Hanawa, Masatoshi Ichikawa, Gaku Oriji, Irwansyah, Keizo Iseki
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Patent number: 10680248Abstract: An electrode material including a conductive sheet containing carbon nanotubes having an average fiber diameter of 1 ?m or less; a liquid inflow member that is formed on a first surface of the conductive sheet such that an electrolyte solution that is passed therethrough flows into the conductive sheet; and a liquid outflow member that is formed on a second surface of the conductive sheet and out of which flows the electrolyte solution that has passed through the conductive sheet; wherein, when using a sheet surface of the conductive sheet as a reference plane, the Darcy permeability, in an in-plane direction, inside the liquid inflow member, is at least 100 times the Darcy permeability, in a normal direction, through the conductive sheet.Type: GrantFiled: April 1, 2016Date of Patent: June 9, 2020Assignee: SHOWA DENKO K.K.Inventors: Masatoshi Ichikawa, Keizo Iseki, Gaku Oriji, Kenzo Hanawa
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Publication number: 20200075968Abstract: This collector plate includes a plurality of flow paths through which an electrolyte is capable of flowing, and which are provided in at least one surface of the collector plate, in which a surface roughness (RaT) of a first surface of an internal wall regulated between the plurality of flow paths, which is measured along a width direction of the internal wall, is smaller than a surface roughness (Rat) of the first surface which is measured along a length direction of the internal wall.Type: ApplicationFiled: December 6, 2017Publication date: March 5, 2020Applicant: SHOWA DENKO K.K.Inventors: Masatoshi ICHIKAWA, Keizo ISEKI, Kenzo HANAWA
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Publication number: 20200075967Abstract: This collector plate includes a plurality of grooves through which an electrolyte is capable of flowing, and which are provided in at least one surface of the collector plate, in which a surface roughness (Ra) of an internal surface of each groove is smaller than a surface roughness (Ra) of a first surface connecting together the grooves.Type: ApplicationFiled: December 6, 2017Publication date: March 5, 2020Applicant: SHOW A DENKO K.K.Inventors: Masatoshi ICHIKAWA, Keizo ISEKI, Kenzo HANAWA
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Publication number: 20190393534Abstract: This collector plate includes a peripheral edge wall that surrounds a predetermined region, and is provided on at least one surface of the collector plate, in which a surface roughness (Ra) of a first surface which is an exposed surface of the peripheral edge wall on the side of one surface, which is measured along a direction perpendicular to an extension direction of the peripheral edge wall is greater than a surface roughness (Ra) of the first surface which is measured along the extension direction of the peripheral edge wall.Type: ApplicationFiled: December 6, 2017Publication date: December 26, 2019Applicant: SHOWA DENKO K.K.Inventors: Masatoshi ICHIKAWA, Keizo ISEKI, Kenzo HANAWA
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Publication number: 20190393533Abstract: This collector plate includes a plurality of flow paths through which an electrolyte flows and which are provided in at least one surface of the collector plate, in which an arithmetic surface roughness (Ra) of a first surface, which is an exposed surface of a wall portion between the plurality of flow paths on the side of one surface, is greater than or equal to 1 ?m and less than or equal to 300 ?m.Type: ApplicationFiled: December 6, 2017Publication date: December 26, 2019Applicant: SHOWA DENKO K.K.Inventors: Masatoshi ICHIKAWA, Keizo ISEKI, Kenzo HANAWA
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Publication number: 20190267657Abstract: A redox flow battery including: an ion-exchange membrane; a current collector plate; and an electrode disposed between the ion-exchange membrane and the current collector plate, wherein charging and discharging are performed by flowing of an electrolytic solution to the electrode. The electrode includes a first electrode part and a second electrode part in this order from the current collector plate side. The area of the second electrode part is larger than the area of the first electrode part and the second electrode part covers the whole of the first electrode part, when viewed from the ion-exchange membrane side. The current collector plate has a peripheral edge wall, which forms a housing region to which the first electrode part fits, on a surface of the electrode side. The second electrode part covers at least a part of a surface of the peripheral edge wall on the ion-exchange membrane side.Type: ApplicationFiled: August 4, 2017Publication date: August 29, 2019Applicant: SHOWA DENKO K.K.Inventors: Masatoshi ICHIKAWA, Keizo ISEKI, Kenzo HANAWA
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Publication number: 20190198904Abstract: The present invention provides a redox flow secondary battery including a positive electrode, a negative electrode facing the positive electrode, and an ion exchange membrane provided between the positive electrode and the negative electrode, at least one electrode of the positive electrode and the negative electrode has a metal protective film having an opening and a carbon electrode including carbon fibers in order from the ion exchange membrane side, and the height of the protruding peak portion of the surface of the metal protective film, which is in contact with the ion exchange membrane, is 0.1 to 2 ?m.Type: ApplicationFiled: September 1, 2017Publication date: June 27, 2019Applicant: SHOWA DENKO K.K.Inventors: Masatoshi ICHIKAWA, Keizo ISEKI, Kenzo HANAWA
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Publication number: 20180366736Abstract: An electrode material including a conductive sheet containing carbon nanotubes having an average fiber diameter of 1 ?m or less; a liquid inflow member that is formed on a first surface of the conductive sheet such that an electrolyte solution that is passed therethrough flows into the conductive sheet; and a liquid outflow member that is formed on a second surface of the conductive sheet and out of which flows the electrolyte solution that has passed through the conductive sheet; wherein, when using a sheet surface of the conductive sheet as a reference plane, the Darcy permeability, in an in-plane direction, inside the liquid inflow member, is at least 100 times the Darcy permeability, in a normal direction, through the conductive sheet.Type: ApplicationFiled: April 1, 2016Publication date: December 20, 2018Applicant: SHOWA DENKO K.K.Inventors: Masatoshi ICHIKAWA, Keizo ISEKI, Gaku ORIJI, Kenzo HANAWA
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Publication number: 20180336924Abstract: According to the present invention, there is provided a recording medium comprising a substrate, a platinum layer formed on the substrate and having a (111) plane preferentially oriented, and a fullerene single crystal thin film formed on the platinum layer, and configured to be a recording layer, wherein an average value of average surface roughness Ra's with respect to four or more visual fields measured by using an atomic force microscope in a surface of the fullerene thin film is 0.5 nm or less.Type: ApplicationFiled: May 15, 2018Publication date: November 22, 2018Applicant: SHOWA DENKO K.K.Inventors: Sho TONEGAWA, Masatoshi ICHIKAWA, Kenzo HANAWA
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Publication number: 20180212266Abstract: A redox flow battery is provided, including an ion-exchange membrane, a current collector plate, and an electrode that is disposed between the ion-exchange membrane and the current collector plate. The electrode includes a main electrode layer in which an electrolytic solution flows from a surface on the current collector plate side to a surface on the ion-exchange membrane side, and the main electrode layer includes a plurality of main electrode pieces which are arranged in parallel in a plane direction.Type: ApplicationFiled: January 30, 2018Publication date: July 26, 2018Applicant: SHOWA DENKO K.K.Inventors: Kenzo HANAWA, Masatoshi ICHIKAWA, Gaku ORIJI, Irwansyah, Keizo ISEKI
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Patent number: 10008232Abstract: According to the present invention, there is provided a recording medium comprising a substrate, a platinum layer formed on the substrate and having a (111) plane preferentially oriented, and a fullerene single crystal thin film formed on the platinum layer, and configured to be a recording layer, wherein an average value of average surface roughness Ra's with respect to four or more visual fields measured by using an atomic force microscope in a surface of the fullerene thin film is 0.5 nm or less.Type: GrantFiled: June 28, 2016Date of Patent: June 26, 2018Assignee: SHOWA DENKO K.K.Inventors: Sho Tonegawa, Masatoshi Ichikawa, Kenzo Hanawa
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Publication number: 20180034066Abstract: A redox flow electrode according to one aspect of the present invention is a redox flow battery electrode disposed between an ion exchange membrane and a bipolar plate, wherein the electrode includes a conductive sheet containing carbon nanotubes having an average fiber diameter of 1 ?m or less, and a porous sheet that is laminated to the conductive sheet and is formed from fibers having an average fiber diameter of greater than 1 ?m.Type: ApplicationFiled: December 24, 2015Publication date: February 1, 2018Applicant: SHOWA DENKO K.K.Inventors: Keizo ISEKI, Masatoshi ICHIKAWA, Gaku ORIJI, Kenzo HANAWA
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Publication number: 20170263277Abstract: According to the present invention, there is provided a recording medium comprising a substrate, a platinum layer formed on the substrate and having a (111) plane preferentially oriented, and a fullerene single crystal thin film formed on the platinum layer, and configured to be a recording layer, wherein an average value of average surface roughness Ra's with respect to four or more visual fields measured by using an atomic force microscope in a surface of the fullerene thin film is 0.5 nm or less.Type: ApplicationFiled: June 28, 2016Publication date: September 14, 2017Applicant: SHOWA DENKO K.K.Inventors: Sho TONEGAWA, Masatoshi ICHIKAWA, Kenzo HANAWA
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Patent number: 7657794Abstract: Embodiments of the invention provide an error recovery scheme that allows a data read/write error in a data storage device to be processed within a short time, and a data storage device that attempts error recovery using the error recovery scheme. In one embodiment, a data storage device conducts an error recovery process for a data access error in accordance with an error recovery procedure having multiple error recovery steps; the data storage device including a head that accesses a data region of a user data storage medium, and a controller that controls the error recovery process by using not only address information of the sector where the access error to the data region has occurred, but also an error recovery log which has address information of the data region and past error recovery information associated with the latter address information.Type: GrantFiled: May 31, 2006Date of Patent: February 2, 2010Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Masatoshi Ichikawa, Akira Kojima, Yoshinori Makita, Kazunari Kose
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Patent number: 7552209Abstract: The Computer System consists of components including more than one Computer and Storage Subsystem to which more than one Computer are connected. The Storage Subsystem is equipped with more than one Storage Unit, Management Table registering information to manage Storage Units accessible by each of the Computers and Controller to control accesses by more than one Computer to more than one Storage Unit. The controller controls the accesses according to the information set in the Management Table when the Storage Unit is accessed by the Computer.Type: GrantFiled: January 28, 2008Date of Patent: June 23, 2009Assignee: Hitachi, Ltd.Inventors: Naoto Matsunami, Akira Yamamoto, Hideki Kamimaki, Masatoshi Ichikawa, Jun Matsumoto, Yasuyuki Mimatsu, Ikuya Yagisawa, Masayuki Yamamoto, Yasunori Kaneda
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Publication number: 20080270608Abstract: The Computer System consists of components including more than one Computer and Storage Subsystem to which more than one Computer are connected. The Storage Subsystem is equipped with more than one Storage Unit, Management Table registering information to manage Storage Units accessible by each of the Computers and Controller to control accesses by more than one Computer to more than one Storage Unit. The controller controls the accesses according to the information set in the Management Table when the Storage Unit is accessed by the Computer.Type: ApplicationFiled: January 28, 2008Publication date: October 30, 2008Inventors: Naoto Matsunami, Akira Yamamoto, Hideki Kamimaki, Masatoshi Ichikawa, Jun Matsumoto, Yasuyuki Mimatsu, Ikuya Yagisawa, Masayuki Yamamoto, Yasunori Kaneda
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Patent number: 7370104Abstract: The Computer System consists of components including more than one Computer and Storage Subsystem to which more than one Computer are connected. The Storage Subsystem is equipped with more than one Storage Unit, Management Table registering information to manage Storage Units accessible by each of the Computers and Controller to control accesses by more than one Computer to more than one Storage Unit. The controller controls the accesses according to the information set in the Management Table when the Storage Unit is accessed by the Computer.Type: GrantFiled: December 12, 2006Date of Patent: May 6, 2008Assignee: Hitachi, Ltd.Inventors: Naoto Matsunami, Akira Yamamoto, Hideki Kamimaki, Masatoshi Ichikawa, Jun Matsumoto, Yasuyuki Mimatsu, Ikuya Yagisawa, Masayuki Yamamoto, Yasunori Kaneda