Patents by Inventor Ryoma Tsukuda
Ryoma Tsukuda 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: 11652216Abstract: An electrode catalyst layer for fuel cells capable of effectively preventing reduction of cell voltage in a high current density region. The electrode catalyst layer contains a catalyst-on-support composed of a support made of a conductive inorganic oxide having a catalyst supported thereon and a hydrophilic material. The hydrophilic material is an agglomerate including hydrophilic conductive particles. The content of the hydrophilic material in the catalyst layer is 2 mass % or higher and lower than 20 mass % relative to the sum of the support and the hydrophilic material. The ratio of the particle size d1 of the hydrophilic particles to the particle size D of the catalyst-on-support is 0.5 to 3.0. The ratio of the particle size d2 of the hydrophilic material to the thickness T of the catalyst layer is 0.1 to 1.2.Type: GrantFiled: June 4, 2019Date of Patent: May 16, 2023Assignee: MITSUI MINING & SMELTING CO., LTD.Inventors: Satoshi Mogi, Hiromu Watanabe, Ryoma Tsukuda, Naohiko Abe
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Publication number: 20210273239Abstract: An electrode catalyst layer for fuel cells capable of effectively preventing reduction of cell voltage in a high current density region. The electrode catalyst layer contains a catalyst-on-support composed of a support made of a conductive inorganic oxide having a catalyst supported thereon and a hydrophilic material. The hydrophilic material is an agglomerate including hydrophilic conductive particles. The content of the hydrophilic material in the catalyst layer is 2 mass % or higher and lower than 20 mass % relative to the sum of the support and the hydrophilic material. The ratio of the particle size d1 of the hydrophilic particles to the particle size D of the catalyst-on-support is 0.5 to 3.0. The ratio of the particle size d2 of the hydrophilic material to the thickness T of the catalyst layer is 0.1 to 1.2.Type: ApplicationFiled: June 4, 2019Publication date: September 2, 2021Inventors: Satoshi MOGI, Hiromu WATANABE, Ryoma TSUKUDA, Naohiko ABE
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Patent number: 10629935Abstract: In this fuel cell electrode catalyst layer, a catalyst is supported on a carrier comprising inorganic oxide particles. The fuel cell electrode catalyst layer is provided with a porous structure. When a mercury penetration method is used to measure the pore size distribution of the porous structure, a peak is observed in the range spanning from 0.005 ?m to 0.1 ?m inclusive, and a peak is also observed in the range spanning from over 0.1 ?m to not more than 1 ?m. When P1 represents the peak intensity in the range spanning from 0.005 ?m to 0.1 ?m inclusive, and P2 represents the peak intensity in the range spanning from over 0.1 ?m to not more than 1 ?m, the value of P2/P1 is 0.2-10 inclusive. It is preferable that the inorganic oxide be tin oxide.Type: GrantFiled: October 21, 2015Date of Patent: April 21, 2020Assignee: MITSUI MINING & SMELTING CO., LTD.Inventors: Ryoma Tsukuda, Naohiko Abe, Hiromu Watanabe, Susumu Takahashi, Kenichi Amitani, Akiko Sugimoto
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Patent number: 10615425Abstract: Disclosed is a tin oxide containing antimony and at least one element A selected from the group consisting of tantalum, tungsten, niobium, and bismuth. The antimony and the at least one element A selected from the group consisting of tantalum, tungsten, niobium, and bismuth are preferably dissolved in a solid state in tin oxide. The ratio of the number of moles of the element A to the number of moles of antimony, i.e., [(the number of moles of the element A/the number of moles of antimony)], is preferably 0.1 to 10.Type: GrantFiled: July 21, 2016Date of Patent: April 7, 2020Assignee: MITSUI MINING & SMELTING CO., LTD.Inventors: Koichi Miyake, Susumu Takahashi, Hiromu Watanbe, Naohiko Abe, Ryoma Tsukuda, Kenichi Amitani, Koji Taniguchi, Hiroki Takahashi, Yoshihiro Yoneda, Kazuhiko Kato
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Publication number: 20180175398Abstract: Disclosed is a tin oxide containing antimony and at least one element A selected from the group consisting of tantalum, tungsten, niobium, and bismuth. The antimony and the at least one element A selected from the group consisting of tantalum, tungsten, niobium, and bismuth are preferably dissolved in a solid state in tin oxide. The ratio of the number of moles of the element A to the number of moles of antimony, i.e., [(the number of moles of the element A/the number of moles of antimony)], is preferably 0.1 to 10.Type: ApplicationFiled: July 21, 2016Publication date: June 21, 2018Inventors: Koichi MIYAKE, Susumu TAKAHASHI, Hiromu WATANBE, Naohiko ABE, Ryoma TSUKUDA, Kenichi AMITANI, Koji TANIGUCHI, Hiroki TAKAHASHI, Yoshihiro YONEDA, Kazuhiko KATO
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Publication number: 20170279143Abstract: In this fuel cell electrode catalyst layer, a catalyst is supported on a carrier comprising inorganic oxide particles. The fuel cell electrode catalyst layer is provided with a porous structure. When a mercury penetration method is used to measure the pore size distribution of the porous structure, a peak is observed in the range spanning from 0.005 ?m to 0.1 ?m inclusive, and a peak is also observed in the range spanning from over 0.1 ?m to not more than 1 ?m. When P1 represents the peak intensity in the range spanning from 0.005 ?m to 0.1 ?m inclusive, and P2 represents the peak intensity in the range spanning from over 0.1 ?m to not more than 1 ?m, the value of P2/P1 is 0.2-10 inclusive. It is preferable that the inorganic oxide be tin oxide.Type: ApplicationFiled: October 21, 2015Publication date: September 28, 2017Inventors: Ryoma TSUKUDA, Naohiko ABE, Hiromu WATANABE, Susumu TAKAHASHI, Kenichi AMITANI, Akiko SUGIMOTO
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Patent number: 8003218Abstract: With respect to a reflection-type display device, an Al-based alloy material for a reflective film, which has excellent reflective characteristics and can be directly bonded to a transparent electrode layer such as ITO and IZO is provided. The present invention is Al—Ni—B alloy material for a reflective film, comprising aluminum containing nickel and boron, wherein a nickel content is 1.5-4 at %, a boron content is 0.1-0.5 at %, and the balance is aluminum. It is more preferable if the nickel content is 1.5-3 at %, and the boron content is 0.1-0.4 at %.Type: GrantFiled: August 30, 2007Date of Patent: August 23, 2011Assignee: Mitsui Mining & Smelting Co., LtdInventors: Yoshinori Matsuura, Ryoma Tsukuda, Hironari Urabe, Takashi Kubota
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Publication number: 20110158845Abstract: To provide an Al—Ni alloy wiring electrode material, which has flexibility suitable for organic EL, can be directly bonded to a transparent electrode layer of ITO or the like, and is excellent in corrosion resistance against developers. An Al—Ni alloy wiring electrode material containing aluminum, nickel and boron, wherein the material contains a total of 0.35 at % to 1.2 at % of nickel and boron with the balance being aluminum. It is also preferred that the Al—Ni alloy wiring electrode material contain 0.3 at % to 0.7 at % of nickel and 0.05 at % to 0.5 at % of boron.Type: ApplicationFiled: March 13, 2009Publication date: June 30, 2011Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Shigeki Tokuchi, Ryoma Tsukuda, Tomoyasu Yano, Yoshinori Matsuura, Takashi Kubota
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Publication number: 20100244032Abstract: An Aluminum-Nickel alloy wiring material includes Aluminum, Nickel, Cerium, and Boron. A thin film transistor includes the Aluminum-Nickel alloy wiring material. A sputtering target comprises Aluminum, Nickel, Cerium and Boron. A method of manufacturing a thin film transistor substrate comprises disposing a thin film transistor on a substrate, wherein the thin film transistor includes a wiring circuit layer comprising Aluminum, Nickel, Cerium, and Boron. The Nickel, Cerium and Boron satisfy the following inequalities; 0.5?X?5.0, 0.01?Y?1.0, and 0.01?Z?1.0, respectively, wherein X represents an atomic percentage of Nickel content, Y represents an atomic percentage of Cerium content, and Z represents an atomic percentage of Boron content.Type: ApplicationFiled: March 31, 2010Publication date: September 30, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Pil Sang YUN, Byeong-Beom KIM, Changoh JEONG, Yangho BAE, Shigeki TOKUCHI, Ryoma TSUKUDA, Yoshinori MATSUURA, Takashi KUBOTA
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Publication number: 20090230416Abstract: With respect to a reflection-type display device, an Al-based alloy material for a reflective film, which has excellent reflective characteristics and can be directly bonded to a transparent electrode layer such as ITO and IZO is provided. The present invention is Al—Ni—B alloy material for a reflective film, comprising aluminum containing nickel and boron, wherein a nickel content is 1.5-4 at %, a boron content is 0.1-0.5 at %, and the balance is aluminum. It is more preferable if the nickel content is 1.5-3 at %, and the boron content is 0.1-0.4 at %.Type: ApplicationFiled: August 30, 2007Publication date: September 17, 2009Inventors: Yoshinori Matsuura, Ryoma Tsukuda, Hironari Urabe, Takashi Kubota
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Patent number: 6840844Abstract: A p-type thermoelectric material is prepared by mixing and melting at least two members selected from bismuth, tellurium, selenium, antimony, and sulfur to obtain an alloy ingot; grinding the alloy ingot to obtain powder of the allow mass; and hot pressing the powder. At least the hot pressing is carried out in the presence of any one of hexane and solvents represented by CnH2n+1OH or CnH2n+2CO (where n is 1, 2 or 3). A dopant may be used at the step of mixing.Type: GrantFiled: February 13, 2003Date of Patent: January 11, 2005Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Norihiko Miyashita, Tomoyasu Yano, Ryoma Tsukuda, Isamu Yashima
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Publication number: 20040217333Abstract: A method of preparing an n-type thermoelectric material includes forming an alloyed ingot by mixing and melting a dopant to be added optionally and at least two elements selected from the group consisting of bismuth, tellurium, selenium, antimony, and sulfur to obtain a material mixture, and by cooling the material mixture. The method also includes pulverizing the alloyed ingot to obtain pulverized powder; sintering the pulverized powder at normal pressure to obtain a half sintered body; and subjecting the half sintered body to hot press performed at pressure more than the normal pressure.Type: ApplicationFiled: October 10, 2003Publication date: November 4, 2004Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Norihiko Miyashita, Tomoyasu Yano, Ryoma Tsukuda, Isamu Yashima
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Publication number: 20030168094Abstract: A thermoelectric material is prepare by mixing and melting at least two members selected from bismuth, tellurium, selenium, antimony, and sulfur to obtain an alloy ingot; grinding the alloy ingot to obtain powder of the alloy ingot; and hot pressing the powder of the alloy ingot. The hot pressing is performed under the conditions of a temperature of 500° C. or higher and 600° C. or lower and a pressure of 20 MPa or higher and 45 MPa or lower.Type: ApplicationFiled: February 13, 2003Publication date: September 11, 2003Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Norihiko Miyasita, Tomoyasu Yano, Ryoma Tsukuda, Isamu Yashima
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Publication number: 20030153248Abstract: A p-type thermoelectric material is prepared by mixing and melting at least two members selected from bismuth, tellurium, selenium, antimony, and sulfur to obtain an alloy ingot, grinding the alloy ingot to obtain powder of the allow mass; and hot pressing the powder. At least the hot pressing is carried out in the presence of any one of hexane and solvents represented by CnH2n+1OH or CnH2n+2CO (where n is 1, 2 or 3). A dopant may be used at the step of mixing.Type: ApplicationFiled: February 13, 2003Publication date: August 14, 2003Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Norihiko Miyashita, Tomoyasu Yano, Ryoma Tsukuda, Isamu Yashima