Patents by Inventor Mitsugu Sohma
Mitsugu Sohma 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: 9159898Abstract: An oxide superconducting thin film includes a substrate, and an intermediate layer and a superconducting layer provided in this order on the substrate. The intermediate layer has an average thickness of from 10 nm to 20 nm and a surface roughness Ra of 0.5 nm or less. The superconducting layer is formed on a surface of the intermediate layer and includes an oxide superconductor as a main component. A superconducting fault current limiter including the oxide superconducting thin film is also provided.Type: GrantFiled: May 31, 2012Date of Patent: October 13, 2015Assignees: FURUKAWA ELECTRIC CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Hajime Kasahara, Norio Matsui, Masakazu Matsui, Naoto Edo, Kengo Nakao, Toshiya Kumagai, Takaaki Manabe, Mitsugu Sohma
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Patent number: 9105794Abstract: An oxide superconducting thin film includes a substrate having a single crystal structure, the main face of the substrate and a crystal face of the single crystal structure having an angle therebetween; an intermediate layer formed on the main face of the substrate and having an axis oriented in a direction perpendicular to the crystal face; and a superconducting layer formed on the intermediate layer and containing, as a main component, an oxide superconductor having a c-axis oriented in a direction perpendicular to the surface of the intermediate layer. A superconducting fault current limiter and a method of manufacturing an oxide superconducting thin film are also provided.Type: GrantFiled: May 30, 2012Date of Patent: August 11, 2015Assignees: FURUKAWA ELECTRIC CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Kengo Nakao, Hajime Kasahara, Masakazu Matsui, Norio Matsui, Naoto Edo, Toshiya Kumagai, Takaaki Manabe, Mitsugu Sohma
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Patent number: 9096440Abstract: A method of producing a superconductive material involves the step (1) of applying a solution of an organic compound of metals and oxides of the metals forming a superconductive material, onto a support body to be subsequently dried, the provisional baking step (2) of causing organic components of the organic compound of the metals to undergo thermal decomposition, and the main baking process step (3) of causing transformation of the oxides of the metals into the superconductive material, thereby producing an epitaxially-grown superconductive coating material, wherein the support body is irradiated with the laser light during a period between the steps (1) and (2) from a surface of the support body, on the opposite side of the surface coated with the solution of the organic compound of the metals for forming the superconductive material.Type: GrantFiled: July 31, 2007Date of Patent: August 4, 2015Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, THE JAPAN STEEL WORKS, LTD.Inventors: Mitsugu Sohma, Tetsuo Tsuchiya, Toshiya Kumagai, Kenichi Tsukada, Kunihiko Koyanagi, Takashi Ebisawa, Hidehiko Ohtu
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Patent number: 8865628Abstract: Provided is a coating solution where, upon producing a rare-earth superconductive composite metal oxide film by means of a coating-pyrolysis method, cracks are not generated in the heat treatment process for eliminating organic components, even when the thickness of the rare-earth superconductive film produced in a single coating is 500 nm or more, and without having to repeat the coating and annealing process. A solution for producing a rare-earth superconductive film which is made into a homogeneous solution by dissolving, in a solvent formed by adding a polyhydric alcohol to a univalent linear alcohol having a carbon number of 1 to 8 and/or water, a metal complex coordinated, relative to metal ions of a metallic species containing rare-earth elements, barium and copper, with pyridine and/or at least one type of tertiary amine, at least one type of carboxylic acid having a carbon number of 1 to 8, and, as needed, an acetylacetonato group.Type: GrantFiled: December 9, 2010Date of Patent: October 21, 2014Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Takaaki Manabe, Iwao Yamaguchi, Toshiya Kumagai, Mitsugu Sohma, Wakichi Kondou, Kenichi Tsukada
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Patent number: 8716189Abstract: A method of producing a superconductive material involves the step (1) of applying a solution of an organic compound of metals, oxides of the metals forming a superconductive material, onto a support body to be subsequently dried, a provisional baking step (2) of causing organic components of the organic compound of the metals to undergo thermal decomposition, and a main baking process step (3) of causing transformation of the oxides of the metals into the superconductive material, thereby producing an epitaxially-grown superconductive coating material, wherein at the time of irradiation of a surface of the support body coated with the solution of the organic compound of the metals for forming the superconductive material, and/or of a surface of the support body, opposite to the surface coated with the solution of the organic compound of the metals, with the laser light, during a period between the steps (1) and (2).Type: GrantFiled: February 5, 2008Date of Patent: May 6, 2014Assignees: National Institute of Advanced Industrial Science and Technology, The Japan Steel Works, Ltd.Inventors: Mitsugu Sohma, Tetsuo Tsuchiya, Toshiya Kumagai, Kenichi Tsukada, Kunihiko Koyanagi, Takashi Ebisawa, Hidehiko Ohtu
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Publication number: 20140087951Abstract: An oxide superconducting thin film includes a substrate, and an intermediate layer and a superconducting layer provided in this order on the substrate. The intermediate layer has an average thickness of from 10 nm to 20 nm and a surface roughness Ra of 0.5 nm or less. The superconducting layer is formed on a surface of the intermediate layer and includes an oxide superconductor as a main component. A superconducting fault current limiter including the oxide superconducting thin film is also provided.Type: ApplicationFiled: May 31, 2012Publication date: March 27, 2014Applicants: National Institute of Advanced Industrial Science and Technology, FURUKAWA ELECTRIC CO., LTD.Inventors: Hajime Kasahara, Norio Matsui, Masakazu Matsui, Naoto Edo, Kengo Nakao, Toshiya Kumagai, Takaaki Manabe, Mitsugu Sohma
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Publication number: 20140080714Abstract: An oxide superconducting thin film includes a substrate having a single crystal structure, the main face of the substrate and a crystal face of the single crystal structure having an angle therebetween; an intermediate layer formed on the main face of the substrate and having an axis oriented in a direction perpendicular to the crystal face; and a superconducting layer formed on the intermediate layer and containing, as a main component, an oxide superconductor having a c-axis oriented in a direction perpendicular to the surface of the intermediate layer. A superconducting fault current limiter and a method of manufacturing an oxide superconducting thin film are also provided.Type: ApplicationFiled: May 30, 2012Publication date: March 20, 2014Applicants: National Institute of Advance Industrial Science and Technology, FURUKAWA ELECTRIC CO., LTD.Inventors: Kengo Nakao, Hajime Kasahara, Masakazu Matsui, Norio Matsui, Naoto Edo, Toshiya Kumagai, Takaaki Manabe, Mitsugu Sohma
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Publication number: 20120270738Abstract: Provided is a coating solution where, upon producing a rare-earth superconductive composite metal oxide film by means of a coating-pyrolysis method, cracks are not generated in the heat treatment process for eliminating organic components, even when the thickness of the rare-earth superconductive film produced in a single coating is 500 nm or more, and without having to repeat the coating and annealing process. A solution for producing a rare-earth superconductive film which is made into a homogeneous solution by dissolving, in a solvent formed by adding a polyhydric alcohol to a univalent linear alcohol having a carbon number of 1 to 8 and/or water, a metal complex coordinated, relative to metal ions of a metallic species containing rare-earth elements, barium and copper, with pyridine and/or at least one type of tertiary amine, at least one type of carboxylic acid having a carbon number of 1 to 8, and, as needed, an acetylacetonato group.Type: ApplicationFiled: December 9, 2010Publication date: October 25, 2012Applicant: National Institute of Advanced Industrial Science and TechnologyInventors: Takaaki Manabe, Iwao Yamaguchi, Toshiya Kumagai, Mitsugu Sohma, Wakichi Kondou, Kenichi Tsukada
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Publication number: 20090318296Abstract: The invention provides a method of efficiently producing a superconductive material more excellent in properties without the occurrence of ablation and so forth, and large in area when executing thermal decomposition of an organic compound of metals, and formation of a superconductive material with heat treatment.Type: ApplicationFiled: February 5, 2008Publication date: December 24, 2009Inventors: Mitsugu Sohma, Tetsuo Tsuchiya, Toshiya Kumagai, Kenichi Tsukada, Kunihiko Koyanagi, Takashi Ebisawa, Hidehiko Ohtu
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Publication number: 20090156411Abstract: There is provided a method of efficiently producing a superconductive material more excellent in properties, and large in area when executing thermal decomposition of a metalorganic compound, and formation of a superconductive material with heat treatment.Type: ApplicationFiled: July 31, 2007Publication date: June 18, 2009Inventors: Mitsugu Sohma, Tetsuo Tsuchiya, Toshiya Kumagai, Kenichi Tsukada, Kunihiko Koyanagi, Takashi Ebisawa, Hidehiko Ohtu