Patents by Inventor Hidenari Yamamoto
Hidenari Yamamoto 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: 11721824Abstract: To provide a high-voltage fuel cell. The fuel cell is a fuel cell comprising an anode-side gas diffusion layer, an anode catalyst layer, an electrolyte membrane, a cathode catalyst layer and a cathode-side gas diffusion layer in this order, wherein a gas diffusion resistance ratio of the anode-side gas diffusion layer to the cathode-side gas diffusion layer is more than 1.50 and less than 2.79; wherein a gas diffusion resistance value of the cathode-side gas diffusion layer is 84 S/m or less at a relative humidity of 165%; and wherein a gas diffusion resistance value of the anode-side gas diffusion layer is less than 234 S/m at a relative humidity of 165%.Type: GrantFiled: October 8, 2021Date of Patent: August 8, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Hidenari Yamamoto
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Publication number: 20220123340Abstract: To provide a high-voltage fuel cell. The fuel cell is a fuel cell comprising an anode-side gas diffusion layer, an anode catalyst layer, an electrolyte membrane, a cathode catalyst layer and a cathode-side gas diffusion layer in this order, wherein a gas diffusion resistance ratio of the anode-side gas diffusion layer to the cathode-side gas diffusion layer is more than 1.50 and less than 2.79; wherein a gas diffusion resistance value of the cathode-side gas diffusion layer is 84 S/m or less at a relative humidity of 165%; and wherein a gas diffusion resistance value of the anode-side gas diffusion layer is less than 234 S/m at a relative humidity of 165%.Type: ApplicationFiled: October 8, 2021Publication date: April 21, 2022Inventor: Hidenari YAMAMOTO
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Patent number: 10662507Abstract: A method for producing a thermoelectric material, comprising: mixing an Sn powder and a powder containing a first dopant element to obtain a first mixed raw material, heating the first mixed raw material at a temperature allowing for mutual diffusion of Sn and the first dopant element to obtain a first aggregate, pulverizing the first aggregate to obtain a first powder, mixing an Mg powder, an Si powder, and the first powder to obtain a second mixed raw material, heating the second mixed raw material at a temperature allowing for mutual diffusion of Mg, Si, Sn and the first dopant element to obtain a second aggregate, pulverizing the second aggregate to obtain a second powder, and pressure-sintering the second powder, and wherein the first dopant element is one or more elements selected from Al, Ag, As, Bi, Cu, Sb, Zn, P, and B.Type: GrantFiled: February 22, 2017Date of Patent: May 26, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hidenari Yamamoto, Hiroyuki Suto
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Patent number: 10103312Abstract: A thermoelectric conversion device including an n-type thermoelectric converter, a p-type thermoelectric converter, a high temperature-side electrode with which one end of the n-type thermoelectric converter and one end of the p-type thermoelectric converter are put into contact, a first low temperature-side electrode in contact with another end of the n-type thermoelectric converter, and a second low temperature-side electrode in contact with another end of the p-type thermoelectric converter, wherein in the n-type thermoelectric converter, the side in contact with the high temperature-side electrode is composed of a carrier generation semiconductor containing Mg2Sn, and in the n-type thermoelectric converter, the side in contact with the first low temperature-side electrode is composed of a carrier transfer semiconductor containing Mg2Si1-xSnx, wherein 0.6?x?0.7, and a first n-type dopant.Type: GrantFiled: May 3, 2017Date of Patent: October 16, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Suto, Hidenari Yamamoto
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Publication number: 20170331025Abstract: A thermoelectric conversion device including an n-type thermoelectric converter, a p-type thermoelectric converter, a high temperature-side electrode with which one end of the n-type thermoelectric converter and one end of the p-type thermoelectric converter are put into contact, a first low temperature-side electrode in contact with another end of the n-type thermoelectric converter, and a second low temperature-side electrode in contact with another end of the p-type thermoelectric converter, wherein in the n-type thermoelectric converter, the side in contact with the high temperature-side electrode is composed of a carrier generation semiconductor containing Mg2Sn, and in the n-type thermoelectric converter, the side in contact with the first low temperature-side electrode is composed of a carrier transfer semiconductor containing Mg2Si1-xSnx, wherein 0.6?x?0.7, and a first n-type dopant.Type: ApplicationFiled: May 3, 2017Publication date: November 16, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki SUTO, Hidenari YAMAMOTO
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Publication number: 20170306445Abstract: A method for producing a thermoelectric material, comprising: mixing an Sn powder and a powder containing a first dopant element to obtain a first mixed raw material, heating the first mixed raw material at a temperature allowing for mutual diffusion of Sn and the first dopant element to obtain a first aggregate, pulverizing the first aggregate to obtain a first powder, mixing an Mg powder, an Si powder, and the first powder to obtain a second mixed raw material, heating the second mixed raw material at a temperature allowing for mutual diffusion of Mg, Si, Sn and the first dopant element to obtain a second aggregate, pulverizing the second aggregate to obtain a second powder, and pressure-sintering the second powder, and wherein the first dopant element is one or more elements selected from Al, Ag, As, Bi, Cu, Sb, Zn, P, and B.Type: ApplicationFiled: February 22, 2017Publication date: October 26, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hidenari YAMAMOTO, Hiroyuki SUTO
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Patent number: 9159489Abstract: The invention includes: powder preparation step of obtaining magnetic core powders by mixing, of magnetic powders with thermosetting resin powders in hot state; powder filling step of filling the obtained magnetic core powders into a die; a compaction step of compacting magnetic core powders; and compact heating step of heating, compacts to the elevated temperature state at which the thermosetting resin hardens after compaction.Type: GrantFiled: July 20, 2011Date of Patent: October 13, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Junghwan Hwang, Takeshi Hattori, Masaki Hirano, Masaki Sugiyama, Yusuke Oishi, Daisuke Okamoto, Hidenari Yamamoto
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Publication number: 20130147081Abstract: The invention includes: powder preparation step of obtaining magnetic core powders by mixing, of magnetic powders with thermosetting resin powders in hot state; powder filling step of filling the obtained magnetic core powders into a die; a compaction step of compacting magnetic core powders; and compact heating step of heating, compacts to the elevated temperature state at which the thermosetting resin hardens after compaction.Type: ApplicationFiled: July 20, 2011Publication date: June 13, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Junghwan Hwang, Takeshi Hattori, Masaki Hirano, Masaki Sugiyama, Yusuke Oishi, Daisuke Okamoto, Hidenari Yamamoto