Patents by Inventor Tadatoshi Kurozumi
Tadatoshi Kurozumi 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: 20160276675Abstract: Electrocatalyst layers include an electrocatalyst having high oxygen reduction activity that is useful as an alternative material to platinum catalysts. Uses of the electrocatalyst layers are also disclosed. The electrocatalyst layer includes an electrocatalyst that is formed of a metal oxide obtained by thermally decomposing a metal organic compound. The metal element forming the electrocatalyst is preferably one selected from the group consisting of niobium, titanium, tantalum and zirconium.Type: ApplicationFiled: May 31, 2016Publication date: September 22, 2016Applicant: SHOWA DENKO K.K.Inventors: Tadatoshi KUROZUMI, Toshikazu SHISHIKURA, Ryuji MONDEN
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Patent number: 9450250Abstract: Catalysts of the present invention are not corroded in acidic electrolytes or at high potential and have excellent durability and high oxygen reducing ability. The catalyst includes a metal oxycarbonitride containing two metals M selected from the group consisting of tin, indium, platinum, tantalum, zirconium, titanium, copper, iron, tungsten, chromium, molybdenum, hafnium, vanadium, cobalt, cerium, aluminum and nickel, and containing zirconium and/or titanium. Also disclosed is a process for producing the catalyst.Type: GrantFiled: June 29, 2015Date of Patent: September 20, 2016Assignee: SHOWA DENKO K.K.Inventors: Ryuji Monden, Tadatoshi Kurozumi, Toshikazu Shishikura, Yasuaki Wakizaka
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Publication number: 20150372311Abstract: Catalysts of the present invention are not corroded in acidic electrolytes or at high potential and have excellent durability and high oxygen reducing ability. The catalyst includes a metal oxycarbonitride containing two metals M selected from the group consisting of tin, indium, platinum, tantalum, zirconium, titanium, copper, iron, tungsten, chromium, molybdenum, hafnium, vanadium, cobalt, cerium, aluminum and nickel, and containing zirconium and/or titanium. Also disclosed is a process for producing the catalyst.Type: ApplicationFiled: June 29, 2015Publication date: December 24, 2015Applicant: SHOWA DENKO K.K.Inventors: Ryuji MONDEN, Tadatoshi KUROZUMI, Toshikazu SHISHIKURA, Yasuaki WAKIZAKA
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Patent number: 9099749Abstract: Catalysts of the present invention are not corroded in acidic electrolytes or at high potential and have excellent durability and high oxygen reducing ability. The catalyst includes a metal oxycarbonitride containing two metals M selected from the group consisting of tin, indium, platinum, tantalum, zirconium, titanium, copper, iron, tungsten, chromium, molybdenum, hafnium, vanadium, cobalt, cerium, aluminum and nickel, and containing zirconium and/or titanium.Type: GrantFiled: March 23, 2009Date of Patent: August 4, 2015Assignee: SHOWA DENKO K.K.Inventors: Ryuji Monden, Tadatoshi Kurozumi, Toshikazu Shishikura, Yasuaki Wakizaka
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Patent number: 8906581Abstract: The invention provides catalysts that are not corroded in acidic electrolytes or at high potential, have excellent durability and show high oxygen reducing ability. In a process of producing fuel cell electrodes containing a metal oxide and an electron conductive substance, the process includes steps in which a sugar is applied and carbonized on a support layer supporting the metal oxide and the electron conductive substance.Type: GrantFiled: October 6, 2009Date of Patent: December 9, 2014Assignee: Showa Denko K.K.Inventor: Tadatoshi Kurozumi
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Patent number: 8889315Abstract: The present invention provides a catalyst which is not corroded in an acidic electrolyte or at a high potential, is excellent in durability and has high oxygen reduction ability. The catalyst of the present invention is characterized by including a niobium oxycarbonitride. The catalyst of the invention is also characterized by including a niobium oxycarbonitride represented by the composition formula NbCxNyOz, wherein x, y and z represent a ratio of the numbers of atoms and are numbers satisfying the conditions of 0.01?x?2, 0.01?y?2, 0.01?z?3 and x+y+z?5.Type: GrantFiled: August 8, 2008Date of Patent: November 18, 2014Assignee: Showa Denko K.K.Inventors: Ryuji Monden, Hiroshi Konuma, Toshikazu Shishikura, Tadatoshi Kurozumi
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Patent number: 8785342Abstract: The present invention provides a catalyst carrier having excellent durability and capable of attaining high catalytic ability without increasing the specific surface area thereof, and a catalyst obtainable by using the catalyst carrier. The catalyst carrier of the present invention comprises a metal oxycarbonitride, preferably the metal contained in the metal oxycarbonitride comprises at least one selected from the group consisting of niobium, tin, indium, platinum, tantalum, zirconium, copper, iron, tungsten, chromium, molybdenum, hafnium, titanium, vanadium, cobalt, manganese, cerium, mercury, plutonium, gold, silver, iridium, palladium, yttrium, ruthenium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and nickel. Moreover, the catalyst of the present invention comprises the catalyst carrier and a catalyst metal supported on the catalyst carrier.Type: GrantFiled: August 20, 2013Date of Patent: July 22, 2014Assignee: Showa Denko K.K.Inventors: Ryuji Monden, Tadatoshi Kurozumi, Toshikazu Shishikura
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Patent number: 8642495Abstract: Catalysts of the invention are not corroded in acidic electrolytes or at high potential and have excellent durability and high oxygen reducing ability. A catalyst includes a metal oxycarbonitride containing niobium and at least one metal M selected from the group consisting of tin, indium, platinum, tantalum, zirconium, copper, iron, tungsten, chromium, molybdenum, hafnium, titanium, vanadium, cobalt, manganese, cerium, mercury, plutonium, gold, silver, iridium, palladium, yttrium, ruthenium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and nickel. A process for making the catalyst involves a heat treatment.Type: GrantFiled: January 16, 2009Date of Patent: February 4, 2014Assignee: Showa Denko K.K.Inventors: Ryuji Monden, Tadatoshi Kurozumi, Toshikazu Shishikura, Takuya Imai
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Publication number: 20130337367Abstract: The present invention provides a catalyst carrier having excellent durability and capable of attaining high catalytic ability without increasing the specific surface area thereof, and a catalyst obtainable by using the catalyst carrier. The catalyst carrier of the present invention comprises a metal oxycarbonitride, preferably the metal contained in the metal oxycarbonitride comprises at least one selected from the group consisting of niobium, tin, indium, platinum, tantalum, zirconium, copper, iron, tungsten, chromium, molybdenum, hafnium, titanium, vanadium, cobalt, manganese, cerium, mercury, plutonium, gold, silver, iridium, palladium, yttrium, ruthenium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and nickel. Moreover, the catalyst of the present invention comprises the catalyst carrier and a catalyst metal supported on the catalyst carrier.Type: ApplicationFiled: August 20, 2013Publication date: December 19, 2013Applicant: SHOWA DENKO K.K.Inventors: Ryuji MONDEN, Tadatoshi KUROZUMI, Toshikazu SHISHIKURA
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Patent number: 8541334Abstract: The present invention provides a catalyst carrier having excellent durability and capable of attaining high catalytic ability without increasing the specific surface area thereof, and a catalyst obtainable by using the catalyst carrier. The catalyst carrier of the present invention comprises a metal oxycarbonitride, preferably the metal contained in the metal oxycarbonitride comprises at least one selected from the group consisting of niobium, tin, indium, platinum, tantalum, zirconium, copper, iron, tungsten, chromium, molybdenum, hafnium, titanium, vanadium, cobalt, manganese, cerium, mercury, plutonium, gold, silver, iridium, palladium, yttrium, ruthenium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and nickel. Moreover, the catalyst of the present invention comprises the catalyst carrier and a catalyst metal supported on the catalyst carrier.Type: GrantFiled: February 10, 2009Date of Patent: September 24, 2013Assignee: Showa Denko K.K.Inventors: Ryuji Monden, Tadatoshi Kurozumi, Toshikazu Shishikura
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Patent number: 8496903Abstract: Catalysts of the invention are not corroded in acidic electrolytes or at high potential and have excellent durability and high oxygen reducing ability. The catalysts include a niobium oxycarbonitride represented by a compositional formula NbCxNyOz (wherein x, y and z represent a ratio of the numbers of the atoms, 0.05?x<0.7, 0.01?y<0.7, 0.4?z<2.5, 1.0<x+y+z<2.56, and 4.0?4x+3y+2z).Type: GrantFiled: January 16, 2009Date of Patent: July 30, 2013Assignee: Show A Denko K.K.Inventors: Ryuji Monden, Tadatoshi Kurozumi, Toshikazu Shishikura
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Publication number: 20120270135Abstract: Provided is a catalyst having high durability with resistance to corrosion in an acidic electrolyte or at high potential and high oxygen reduction activity. The catalyst is a metal oxycarbonitride containing at least one group III transition metal compound and at least one group IV or V transition metal oxide having a crystallite size of 1 to 100 nm. The group III transition metal compound may be a compound of at least one selected from the group consisting of scandium, yttrium, lanthanum, cerium, samarium, dysprosium, and holmium. The group IV or V transition metal oxide may be an oxide of at least one selected from the group consisting of titanium, zirconium, tantalum, and niobium.Type: ApplicationFiled: April 21, 2011Publication date: October 25, 2012Applicant: SHOWA DENKO K.K.Inventor: Tadatoshi KUROZUMI
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Patent number: 8268490Abstract: Catalyst layers include an electrocatalyst having high oxygen reduction activity that is useful as an alternative material to platinum catalysts. Uses of the catalyst layers are also disclosed. A catalyst layer of the invention includes an electrode substrate and an electrocatalyst on the surface of the electrode substrate, and the electrocatalyst is formed of a metal compound obtained by hydrolyzing a metal salt or a metal complex.Type: GrantFiled: July 23, 2008Date of Patent: September 18, 2012Assignee: Showa Denko K.K.Inventors: Tadatoshi Kurozumi, Toshikazu Shishikura
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Patent number: 8182950Abstract: A metal oxide electrode catalyst which includes a metal oxide (Y) obtained by heat treating a metal compound (X) under an oxygen-containing atmosphere. The valence of the metal in the metal compound (X) is smaller than the valence of the metal in the metal oxide (Y). Further, the metal oxide electrocatalyst has an ionization potential in the range of 4.9 to 5.5 eV.Type: GrantFiled: July 23, 2008Date of Patent: May 22, 2012Assignee: Showa Denko K.K.Inventors: Tadatoshi Kurozumi, Toshikazu Shishikura, Hiroshi Konuma
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Patent number: 8052954Abstract: A barium calcium titanate of the present invention has a remarkable effect that a fine barium calcium titanate powder having excellent dispersibility, reduced impurities and high crystallinity and being solid-dissolved at an arbitrary ratio, and a production process thereof are provided. The barium calcium titanate represented by the compositional formula: (Ba(1-X)CaX)YTiO3 (wherein 0<X<0.2 and 0.98?Y?1.02), which contains 3 mol % or less (including 0 mol %) of an orthorhombic perovskite compound and in which the specific surface area D is from 1 to 100 m2/g.Type: GrantFiled: August 26, 2005Date of Patent: November 8, 2011Assignee: Showa Denko K.K.Inventors: Tadatoshi Kurozumi, Akihiko Shirakawa
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Publication number: 20110229793Abstract: A metal oxide electrode catalyst which includes a metal oxide (Y) obtained by heat treating a metal compound (X) under an oxygen-containing atmosphere. The valence of the metal in the metal compound (X) is smaller than the valence of the metal in the metal oxide (Y). Further, the metal oxide electrocatalyst has an ionization potential in the range of 4.9 to 5.5 eV.Type: ApplicationFiled: July 23, 2008Publication date: September 22, 2011Applicant: SHOWA DENKO K.K.Inventors: Tadatoshi Kurozumi, Toshikazu Shishikura, Hiroshi Konuma
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Publication number: 20110183236Abstract: The invention provides catalysts that are not corroded in acidic electrolytes or at high potential, have excellent durability and show high oxygen reducing ability. In a process of producing fuel cell electrodes containing a metal oxide and an electron conductive substance, the process includes steps in which a sugar is applied and carbonized on a support layer supporting the metal oxide and the electron conductive substance.Type: ApplicationFiled: October 6, 2009Publication date: July 28, 2011Applicant: SHOWA DENKO K.K.Inventor: Tadatoshi Kurozumi
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Publication number: 20110059386Abstract: Catalysts of the invention are not corroded in acidic electrolytes or at high potential and have excellent durability and high oxygen reducing ability. The catalysts include a niobium oxycarbonitride represented by a compositional formula NbCxNyOz (wherein x, y and z represent a ratio of the numbers of the atoms, 0.05?x<0.7, 0.01?y<0.7, 0.4?z<2.5, 1.0<x+y+z<2.56, and 4.0?4x+3y+2z).Type: ApplicationFiled: January 16, 2009Publication date: March 10, 2011Applicant: SHOWA DENKO K.K.Inventors: Ryuji Monden, Tadatoshi Kurozumi, Toshikazu Shishikura
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Publication number: 20110053040Abstract: Catalysts of the invention are not corroded in acidic electrolytes or at high potential and have excellent durability and high oxygen reducing ability. A catalyst includes a metal oxycarbonitride containing niobium and at least one metal M selected from the group consisting of tin, indium, platinum, tantalum, zirconium, copper, iron, tungsten, chromium, molybdenum, hafnium, titanium, vanadium, cobalt, manganese, cerium, mercury, plutonium, gold, silver, iridium, palladium, yttrium, ruthenium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and nickel.Type: ApplicationFiled: January 16, 2009Publication date: March 3, 2011Applicant: SHOWA DENKO K.K.Inventors: Ryuji Monden, Tadatoshi Kurozumi, Toshikzu Shishikura, Takuya Imai
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Publication number: 20110020729Abstract: Catalysts of the present invention are not corroded in acidic electrolytes or at high potential and have excellent durability and high oxygen reducing ability. The catalyst includes a metal oxycarbonitride containing two metals M selected from the group consisting of tin, indium, platinum, tantalum, zirconium, titanium, copper, iron, tungsten, chromium, molybdenum, hafnium, vanadium, cobalt, cerium, aluminum and nickel, and containing zirconium and/or titanium.Type: ApplicationFiled: March 23, 2009Publication date: January 27, 2011Applicant: SHOWDA DENKO K.K.Inventors: Ryuji Monden, Tadatoshi Kurozumi, Toshikazu Shishikura, Yasuaki Wakizaka