Patents by Inventor Kazunori Igarashi
Kazunori Igarashi 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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Publication number: 20220249689Abstract: The present invention provides a polymeric complex comprising a protein and a block copolymer represented by the following formula (1).Type: ApplicationFiled: June 25, 2020Publication date: August 11, 2022Applicant: THE UNIVERSITY OF TOKYOInventors: Horacio CABRAL, Anqi TAO, Kazunori IGARASHI, Takuya MIYAZAKI, George HUANG, Pengwen CHEN
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Patent number: 11183321Abstract: The present invention relates to a powder magnetic core with silica-based insulating film having a structure in which a plurality of Fe-based soft magnetic powder particles having surfaces coated with a silica-based insulating film are joined with each other through a grain boundary layer made of the silica-based insulating film. Fe diffused from the Fe-based soft magnetic powder particles is contained in the grain boundary layer and the grain boundary layer contains an oxide of each of Fe and Si or a composite oxide of Fe and Si.Type: GrantFiled: March 30, 2017Date of Patent: November 23, 2021Assignee: Diamet CorporationInventors: Hiroaki Ikeda, Kazunori Igarashi
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Publication number: 20200258667Abstract: This silica-based insulator-coated soft magnetic powder is a Fe-based soft magnetic powder of which a surface is coated with a silica-based insulating film, the silica-based insulating film includes a Fe oxide and a Si oxide, and the Fe oxide and the Si oxide satisfy that O(—Fe)/O(—Si) (a ratio of an amount of O in the Fe oxide to an amount of O in the Si oxide in the silica-based insulating film) is 0.05 to 1.0 (at % ratio).Type: ApplicationFiled: October 2, 2018Publication date: August 13, 2020Inventors: Hiroaki Ikeda, Kazunori Igarashi
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Patent number: 10351946Abstract: Provided are a sputtering target composed of a Cu—Ga sintered compact that has a further reduced oxygen content and can suppress abnormal discharges, and a method for producing the same. The sintered compact has a component composition containing a Ga content of 20 at % or higher and less than 30 at % with the balance being Cu and inevitable impurities, and has an oxygen content of 100 ppm or lower and an average grain size of 100 ?m or less, and exhibits the diffraction peaks assigned to the ? and ? phases of CuGa as observed in X-ray diffraction, wherein the main peak intensity of the diffraction peaks assigned to the ? phase is 10% or higher relative to that of the diffraction peaks assigned to the ? phase.Type: GrantFiled: October 7, 2013Date of Patent: July 16, 2019Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Kazunori Igarashi, Muneaki Watanabe, Yuuki Yoshida, Kouichi Ishiyama, Satoru Mori
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Publication number: 20190131040Abstract: The present invention relates to a powder magnetic core with silica-based insulating film having a structure in which a plurality of Fe-based soft magnetic powder particles having surfaces coated with a silica-based insulating film are joined with each other through a grain boundary layer made of the silica-based insulating film. Fe diffused from the Fe-based soft magnetic powder particles is contained in the grain boundary layer and the grain boundary layer contains an oxide of each of Fe and Si or a composite oxide of Fe and Si.Type: ApplicationFiled: March 30, 2017Publication date: May 2, 2019Applicants: MITSUBISHI MATERIALS CORPORATION, Diamet CorporationInventors: Hiroaki IKEDA, Kazunori IGARASHI
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Patent number: 9773597Abstract: A composite soft magnetic material having low magnetostriction and high magnetic flux density contains: pure iron-based composite soft magnetic powder particles that are subjected to an insulating treatment by a Mg-containing insulating film or a phosphate film; and Fe—Si alloy powder particles including 11%-16% by mass of Si. A ratio of an amount of the Fe—Si alloy powder particles to a total amount is in a range of 10%-60% by mass. A method for producing the composite soft magnetic material comprises the steps of: mixing a pure iron-based composite soft magnetic powder, and the Fe—Si alloy powder in such a manner that a ratio of the Fe—Si alloy powder to a total amount is in a range of 10%-60%; subjecting a resultant mixture to compression molding; and subjecting a resultant molded body to a baking treatment in a non-oxidizing atmosphere.Type: GrantFiled: February 22, 2012Date of Patent: September 26, 2017Assignees: MITSUBISHI MATERIALS CORPORATION, DIAMET CORPORATIONInventors: Hiroaki Ikeda, Hiroshi Tanaka, Kazunori Igarashi
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Publication number: 20160237551Abstract: Provided are a sputtering target composed of a Cu—Ga sintered compact that has a further reduced oxygen content and can suppress abnormal discharges, and a method for producing the same. The sintered compact has a component composition containing a Ga content of 20 at % or higher and less than 30 at % with the balance being Cu and inevitable impurities, and has an oxygen content of 100 ppm or lower and an average grain size of 100 ?m or less, and exhibits the diffraction peaks assigned to the ? and ? phases of CuGa as observed in X-ray diffraction, wherein the main peak intensity of the diffraction peaks assigned to the ? phase is 10% or higher relative to that of the diffraction peaks assigned to the ? phase.Type: ApplicationFiled: October 7, 2013Publication date: August 18, 2016Inventors: Kazunori Igarashi, Muneaki Watanabe, Yuuki Yoshida, Kouichi Ishiyama, Satoru Mori
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Patent number: 9228091Abstract: To provide a ferrite thin film-forming composition material that is a composition material for forming a ferrite thin film by using the sol-gel method which can form a thin ferrite thin film having a uniform thickness and, furthermore, has excellent long-term storage stability, a method of forming a ferrite thin film using the above composition material, and a ferrite thin film formed by using the above method. A ferrite thin film-forming composition material is a composition material for forming a NiZn ferrite, CuZn ferrite, or NiCuZn ferrite thin film by using a sol-gel method, in which the composition material is formed by dissolving metallic raw materials in a solvent including acetonitrile, and the fraction of acetonitrile is 30 mass % to 60 mass % with respect to 100 mass % of the composition material.Type: GrantFiled: March 14, 2013Date of Patent: January 5, 2016Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Toshihiro Doi, Hideaki Sakurai, Kenzo Nakamura, Kazunori Igarashi, Nobuyuki Soyama
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Publication number: 20140284515Abstract: This ferrite thin film-forming composition is a composition for forming a thin film of NiZn ferrite, CuZn ferrite, or NiCuZn ferrite using a sol-gel method, and the composition includes: metal raw materials; and a solvent containing N-methyl pyrrolidone, wherein a ratio of an amount of N-methyl pyrrolidone to 100 mass % of the total amount of the composition is in a range of 30 to 60 mass %.Type: ApplicationFiled: February 14, 2014Publication date: September 25, 2014Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Toshihiro Doi, Hideaki Sakurai, Nobuyuki Soyama, Kenzo Nakamura, Kazunori Igarashi
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Publication number: 20130298730Abstract: A composite soft magnetic material having low magnetostriction and high magnetic flux density contains: pure iron-based composite soft magnetic powder particles that are subjected to an insulating treatment by a Mg-containing insulating film or a phosphate film; and Fe—Si alloy powder particles including 11%-16% by mass of Si. A ratio of an amount of the Fe—Si alloy powder particles to a total amount is in a range of 10%-60% by mass. A method for producing the composite soft magnetic material comprises the steps of: mixing a pure iron-based composite soft magnetic powder, and the Fe—Si alloy powder in such a manner that a ratio of the Fe—Si alloy powder to a total amount is in a range of 10%-60%; subjecting a resultant mixture to compression molding; and subjecting a resultant molded body to a baking treatment in a non-oxidizing atmosphere.Type: ApplicationFiled: February 22, 2012Publication date: November 14, 2013Applicants: DIAMET CORPORATION, MITSUBISHI MATERIALS CORPORATIONInventors: Hiroaki Ikeda, Hiroshi Tanaka, Kazunori Igarashi
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Publication number: 20130256582Abstract: To provide a ferrite thin film-forming composition material that is a composition material for forming a ferrite thin film by using the sol-gel method which can form a thin ferrite thin film having a uniform thickness and, furthermore, has excellent long-term storage stability, a method of forming a ferrite thin film using the above composition material, and a ferrite thin film formed by using the above method. A ferrite thin film-forming composition material is a composition material for forming a NiZn ferrite, CuZn ferrite, or NiCuZn ferrite thin film by using a sol-gel method, in which the composition material is formed by dissolving metallic raw materials in a solvent including acetonitrile, and the fraction of acetonitrile is 30 mass % to 60 mass % with respect to 100 mass % of the composition material.Type: ApplicationFiled: March 14, 2013Publication date: October 3, 2013Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Toshihiro Doi, Hideaki Sakurai, Kenzo Nakamura, Kazunori Igarashi, Nobuyuki Soyama
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Publication number: 20130256585Abstract: A method of forming a ferrite thin film by carrying out a process for forming a coated film by coating a ferrite thin film-forming composition on a heat-resistant substrate and a process for calcining the coated film once or a plurality of times so that the thickness of the calcined film on the substrate becomes a desired thickness, and firing the calcined film formed on the substrate, in which the conditions for firing the calcined film formed on the substrate are under the atmosphere or an oxygen gas or inert gas atmosphere, a temperature-rise rate of 1° C./minute to 50° C./minute, a holding temperature of 500° C. to 800° C., and a holding time of 30 minutes to 120 minutes.Type: ApplicationFiled: March 15, 2013Publication date: October 3, 2013Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Toshihiro Doi, Hideaki Sakurai, Kenzo Nakamura, Kazunori Igarashi, Nobuyuki Soyama
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Patent number: 7789077Abstract: To prevent dew condensation in a crankcase in a lower part of the crankcase, wherein an oil pan is an integral part of an internal combustion engine, to prevent lubricating oil from being diluted. A crankcase cover covers at least an oil pan out of a crankcase and is provided to the bottom of the crankcase. A heat insulating material is provided between the crankcase and the crankcase cover. A cooling fluid passage for providing a circulation to cool a cylinder or a cylinder head is provided between the crankcase and the crankcase cover. A passage at least one end of which reaches a cylinder head from a crankcase via a cylinder block forms at least a part of a blowby gas passage, is directly provided to the crankcase, the cylinder block and the cylinder head. A flow control valve is arranged in the cylinder block or the cylinder head.Type: GrantFiled: April 10, 2007Date of Patent: September 7, 2010Assignee: Honda Motor Co., Ltd.Inventors: Kazunori Igarashi, Makoto Ogasawara
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Patent number: 7575645Abstract: The invention provides an Fe—Ni—Mo soft magnetic flaky powder having a component composition of, in percent by mass, Ni: 60 to 90%, Mo: 0.05 to 1.95%, and the balance of Fe and unavoidable impurities, and a flat surface of an average particle size of 30 to 150 ?m, and an aspect ratio (average particle size /average thickness) of 5 to 500; and having a peak intensity ratio I200/I111 within a range between 0.43 and 10, where I200 is the peak height of the face index (200) and I111 is the peak height of the face index (111), in an X-ray diffraction pattern measured in such a manner that the plane including the X-ray incident direction and the diffraction direction is perpendicular to the flat surface of the soft magnetic flaky powder, and the angle between the incident direction and the flat surface is equal to the angle between the diffraction direction and the flat surface.Type: GrantFiled: August 4, 2004Date of Patent: August 18, 2009Assignees: Mitsubishi Materials Corporation, JEMCO Inc.Inventors: Kazunori Igarashi, Gakuji Uozumi, Yasushi Nayuki, Ryoji Nakayama
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Patent number: 7497914Abstract: The invention provides an Fe—Ni—Mo soft magnetic flaky powder having a component composition of, in percent by mass, Ni: 60 to 90%, Mo: 0.05 to 1.95%, and the balance of Fe and unavoidable impurities, and a flat surface of an average particle size of 30 to 150 ?m, and an aspect ratio (average particle size /average thickness) of 5 to 500; and having a peak intensity ratio I200/I111 within a range between 0.43 and 10, where I200 is the peak height of the face index (200) and I111 is the peak height of the face index (111), in an X-ray diffraction pattern measured in such a manner that the plane including the X-ray incident direction and the diffraction direction is perpendicular to the flat surface of the soft magnetic flaky powder, and the angle between the incident direction and the flat surface is equal to the angle between the diffraction direction and the flat surface.Type: GrantFiled: August 4, 2004Date of Patent: March 3, 2009Assignees: Mitsubishi Materials Corporation, Jemco Inc.Inventors: Kazunori Igarashi, Gakuji Uozumi, Yasushi Nayuki, Ryoji Nakayama
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Patent number: 7371271Abstract: An object of the present invention is to provide a composite soft magnetic sintered material that has high density, high mechanical strength and high relative magnetic permeability at high frequencies and, in order to achieve this object, the present invention provides a method of producing the composite soft magnetic sintered material, which comprises mixing a composite soft magnetic powder, that consists of iron powder, Fe—Si based soft magnetic iron alloy powder, Fe—Al based soft magnetic iron alloy powder, Fe—Si—Al based soft magnetic iron alloy powder, Fe—Cr based soft magnetic iron alloy powder or nickel-based soft magnetic alloy powder (hereinafter these powders are referred to as soft magnetic metal powder) of which particles arc coated with a ferrite layer which has a spinel structure, with 0.05 to 1.Type: GrantFiled: March 29, 2002Date of Patent: May 13, 2008Assignee: Mitsubishi Materials PMG CorporationInventors: Kazunori Igarashi, Ryoji Nakayama, Koichiro Morimoto, Muneaki Watanabe
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Publication number: 20070245983Abstract: To prevent dew condensation in a crankcase in a lower part of the crankcase, wherein an oil pan is an integral part of an internal combustion engine, to prevent lubricating oil from being diluted. A crankcase cover covers at least an oil pan out of a crankcase and is provided to the bottom of the crankcase. A heat insulating material is provided between the crankcase and the crankcase cover. A cooling fluid passage for providing a circulation to cool a cylinder or a cylinder head is provided between the crankcase and the crankcase cover. A passage at least one end of which reaches a cylinder head from a crankcase via a cylinder block forms at least a part of a blowby gas passage, is directly provided to the crankcase, the cylinder block and the cylinder head. A flow control valve is arranged in the cylinder block or the cylinder head.Type: ApplicationFiled: April 10, 2007Publication date: October 25, 2007Applicant: HONDA MOTOR CO., LTD.Inventors: Kazunori Igarashi, Makoto Ogasawara
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Publication number: 20070131311Abstract: The invention provides an Fe—Ni—Mo soft magnetic flaky powder having a component composition of, in percent by mass, Ni: 60 to 90%, Mo: 0.05 to 1.95%, and the balance of Fe and unavoidable impurities, and a flat surface of an average particle size of 30 to 150 ?m, and an aspect ratio (average particle size /average thickess) of 5 to 500; and having a peak intensity ratio I200/I111 within a range between 0.43 and 10, where I200 is the peak height of the face index (200) and I111 is the peak height of the face index (111), in an X-ray diffraction pattern measured in such a manner that the plane including the X-ray incident direction and the diffraction direction is perpendicular to the flat surface of the soft magnetic flaky powder, and the angle between the incident direction and the flat surface is equal to the angle between the diffraction direction and the flat surface.Type: ApplicationFiled: August 4, 2004Publication date: June 14, 2007Inventors: Kazunori Igarashi, Gakuji Uozumi, Yasushi Nayuki, Ryoji Nakayama
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Publication number: 20040208311Abstract: An object of the present invention is to reduce unwanted voice echoed back to the transmitting party in an IP telephone. In order to achieve this object, in the curl cord of the present invention, two microphone lines connected to a differential input type microphone are respectively wired at approximately the same distance from a single speaker line connected to a single end output type speaker. Thereby, noise signals caused by cross-talk to the microphone lines from the speaker line transmitting the voice signal of the transmitting party will be of the same phase and same amplitude. By cancelling out these noise signals by means of common mode rejection in the differential amplifier provided in the base unit, it is possible to reduce the echoing back of unwanted voice to the transmitting party.Type: ApplicationFiled: June 10, 2003Publication date: October 21, 2004Applicant: Uniden CorporationInventors: Kazunori Igarashi, Tetsuro Otake, Teruyasu Sugioka
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Publication number: 20040161600Abstract: An object of the present invention is to provide a composite soft magnetic sintered material that has high density, high mechanical strength and high relative magnetic permeability at high frequencies and, in order to achieve this object, the present invention provides a method of producing the composite soft magnetic sintered material, which comprises mixing a composite soft magnetic powder, that consists of iron powder, Fe—Si based soft magnetic iron alloy powder, Fe—Al based soft magnetic iron alloy powder, Fe—Si—Al based soft magnetic iron alloy powder, Fe—Cr based soft magnetic iron alloy powder or nickel-based soft magnetic alloy powder (hereinafter these powders are referred to as soft magnetic metal powder) of which particles arc coated with a ferrite layer which has a spinel structure, with 0.05 to 1.Type: ApplicationFiled: April 6, 2004Publication date: August 19, 2004Inventors: Kazunori Igarashi, Ryoji Nakayama, Koichiro Morimoto, Muneaki Watanabe