Patents by Inventor Nobuyuki Takagi
Nobuyuki Takagi 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: 20240118234Abstract: A joint portion evaluating method for measuring and evaluating a joint state of a joint portion at which a first joint body and a second joint body are joined together, the joint portion evaluating method including the steps of: acquiring as a reference value a capacitance value of the joint portion in a reference measurement state serving as a reference for measurement conditions; changing a measurement state from the reference measurement state and acquiring as a measured value a capacitance value of the joint portion in a changed measurement state arising after the change of the measurement state; deriving as a measurement evaluation value a value obtained by referencing the measured value with the reference value; and performing an evaluation based on the derived measurement evaluation value.Type: ApplicationFiled: February 9, 2022Publication date: April 11, 2024Inventors: Mikio MURAOKA, Nobuyuki KAMIHARA, Kiyoka TAKAGI, Sota KAMO, Naomoto ISHIKAWA, Hideki HORIZONO, Toshiyuki TAKAYANAGI
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Publication number: 20240017246Abstract: The exhaust gas purification device includes: a substrate including an upstream and a downstream ends; a first catalyst layer extending across a first region and containing a first rhodium-containing catalyst and a first cerium-containing oxide, the first rhodium-containing catalyst containing a first metal oxide carrier and first rhodium particles supported on the first metal oxide carrier, a mean of a particle size distribution of the first rhodium particles being 1.5 nm to 18 nm; and a second catalyst layer extending across a second region and containing a second rhodium-containing catalyst containing a second metal oxide carrier and second rhodium particles supported on the second metal oxide carrier, a cerium content in the first catalyst layer based on a volume capacity of the substrate in the first region being higher than a cerium content in the second catalyst layer based on a volume capacity of the substrate in the second region.Type: ApplicationFiled: May 16, 2023Publication date: January 18, 2024Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Takahiro NISHIO, Shogo Shirakawa, Hiroki Shirakawa, Nobuyuki Takagi, Tomomasa Aikawa, Hiroki Nihashi, Takahiro Noguchi
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Publication number: 20230405569Abstract: Provided is an exhaust gas purification catalyst having a catalyst performance and an OSC performance in a compatible manner in an air-fuel ratio (A/F) rich atmosphere where HC poisoning is likely to occur. The exhaust gas purification catalyst includes a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer includes a first catalyst coating layer containing Pd and/or Pt as a catalyst metal and a second catalyst coating layer containing Rh as a catalyst metal. The first catalyst coating layer is formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst. The second catalyst coating layer includes a high specific surface area OSC material having a specific surface area of more than 40 m2/g, a medium specific surface area OSC material having a specific surface area of 4 m2/g to 40 m2/g, and a low specific surface area OSC material having a specific surface area of less than 4 m2/g.Type: ApplicationFiled: June 19, 2023Publication date: December 21, 2023Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Takahiro NISHIO, Shogo SHIRAKAWA, Takumi TOJO, Nobuyuki TAKAGI, Yosuke TODA, Sho HOSHINO, Shun SAKAMOTO
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Publication number: 20230372907Abstract: Provided are a method for producing an exhaust gas purification material and a method for manufacturing an exhaust gas purification device that allow efficient removal of a harmful component even after exposure to a high temperature environment. The method for producing the exhaust gas purification material includes the steps, in this order, of: (a) impregnating a metal oxide carrier with a rhodium compound solution; (b) drying the metal oxide carrier impregnated with the rhodium compound solution to obtain a rhodium-containing catalyst containing the metal oxide carrier and rhodium particles supported on the metal oxide carrier; (c) heating the rhodium-containing catalyst at a temperature within a range from 700° C. to 900° C. under an inert atmosphere; and (d) mixing the rhodium-containing catalyst with a material having a basicity higher than a basicity of the metal oxide carrier.Type: ApplicationFiled: May 16, 2023Publication date: November 23, 2023Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Takahiro NISHIO, Shogo SHIRAKAWA, Nobuyuki TAKAGI, Tomomasa AIKAWA, Hiroki NIHASHI, Takahiro NOGUCHI
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Publication number: 20230372917Abstract: The exhaust gas purification device includes: a substrate including an upstream end through which an exhaust gas is introduced and a downstream end through which the exhaust gas is discharged; a first catalyst layer containing a rhodium-containing catalyst containing a metal oxide carrier and rhodium particles supported on the metal oxide carrier, the first catalyst layer extending across a first region; and a second catalyst layer containing palladium particles and a material having a basicity higher than a basicity of the metal oxide carrier, the second catalyst layer extending across a second region. A mean of a particle size distribution of the rhodium particles is from 1.5 nm to 18 nm.Type: ApplicationFiled: May 16, 2023Publication date: November 23, 2023Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Takahiro NISHIO, Shogo Shirakawa, Hiroki Shirakawa, Nobuyuki Takagi, Tomomasa Aikawa, Hiroki Nihashi, Takahiro Noguchi
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Patent number: 11821349Abstract: An exhaust gas purification catalyst including an alkaline-earth metal carried on a porous carrier in a highly dispersed state. The catalyst layer of the exhaust gas purification catalyst has an alkaline-earth metal carrying region including a porous carrier, Pt, and a sulfuric acid salt of at least one alkaline-earth metal carried on the porous carrier, wherein a value of RAe/Pt is 0.5 or more, where RAe/Pt represents the Pearson's correlation coefficient calculated using ? and ? in each pixel obtained by, for a cross section of the region, performing the area analysis by FE-EPMA under the conditions of: pixel size 0.34 ?m×0.34 ?m; and number of measured pixels 256×256; and measuring an intensity (?: cps) of a characteristic X ray of an element (Ae) of the alkaline-earth metal and an intensity (?: cps) of a characteristic X ray of Pt for each pixel.Type: GrantFiled: September 9, 2019Date of Patent: November 21, 2023Assignees: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shogo Kawamura, Tomomasa Aikawa, Isao Naito, Hiroki Nihashi, Nobuyuki Takagi, Takeshi Nobukawa
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Publication number: 20230356192Abstract: The present disclosure provides an oxygen storage/release material that has achieved both the improved oxygen storage/release capacity at low temperature and heat tolerance, which comprises a ceria-zirconia-based composite oxide, wherein the ceria-zirconia-based composite oxide further comprises praseodymium (Pr) or neodymium (Nd), and has, in at least a part thereof, at least one ordered phase of ? phase and a pyrochlore phase, a proportion of primary particles having particle diameters of 0.4 ?m to 1.5 ?m is 40% to 100% on a particle number basis, and, when heated for 5 hours in the air at 1,100° C., I(14/29) value is 0.015 or more and I(28/29) value is 0.08 or less. The present disclosure also relates to a method for producing such oxygen storage/release material.Type: ApplicationFiled: April 13, 2023Publication date: November 9, 2023Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Eriko YOSHIMOTO, Nobuyuki TAKAGI, Takuya OKUDA, Yuhei UDAGAWA, Takahiro HARADA
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Patent number: 11759769Abstract: Provided is an exhaust gas purification device that allows improving an exhaust gas purification performance. An exhaust gas purification device of the present disclosure includes a substrate and a catalyst layer disposed on the substrate. The catalyst layer contains a porous carrier, a catalytic metal that is supported by the porous carrier and belongs to platinum group, an alkaline earth metal supported by the porous carrier, and an alkaline earth metal not supported by the porous carrier. At least a part of the alkaline earth metal supported by the porous carrier is supported inside the porous carrier.Type: GrantFiled: October 7, 2021Date of Patent: September 19, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Isao Chinzei, Seiji Nakahigashi, Takumi Tojo, Masahide Miura, Nobuyuki Takagi, Yoshiteru Yazawa, Sho Hoshino, Minoru Ito, Naoto Fujita, Tomomasa Aikawa
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Publication number: 20230201770Abstract: A catalyst for purification of exhaust gas including a substrate, and a catalyst coat layer which is formed on a surface of the substrate and contains catalyst particles, wherein the catalyst coat layer has an average thickness ranging 25 to 150 ?m, a void fraction, as determined by scanning electron microscope observation of a cross-section of the catalyst coat layer, ranging 1.5 to 8.0% by volume, 60 to 90% by volume of all voids in the catalyst coat layer are high-aspect ratio pores which have equivalent circle diameters ranging 2 to 50 ?m in a cross-sectional image of a cross-section of the catalyst coat layer perpendicular to a flow direction of exhaust gas in the substrate, and which ratios of 5 or higher, the high-aspect ratio pores have an average aspect ratio ranging 10 to 50, and a noble metal is supported on the entire catalyst coat layer.Type: ApplicationFiled: June 8, 2021Publication date: June 29, 2023Applicant: CATALER CORPORATIONInventors: Toshio YAMAMOTO, Akira MORIKAWA, Satoru KATOH, Masahide MIURA, Nobusuke KABASHIMA, Nobuyuki TAKAGI, Takashi ONOZUKA, Mitsuyoshi OKADA
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Patent number: 11643958Abstract: The present disclosure provides an exhaust gas purification material and an exhaust gas purification device that can efficiently remove harmful components even after being exposed to high temperature. Such exhaust gas purification material comprises metal oxide particles and noble metal particles supported on the metal oxide particles. The noble metal particles have a particle size distribution with a mean of 1.5 nm and 18 nm and a standard deviation of less than 1.6 nm.Type: GrantFiled: March 24, 2022Date of Patent: May 9, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norimichi Shimano, Taizo Yoshinaga, Shogo Shirakawa, Nobuyuki Takagi, Masahide Miura
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Patent number: 11559786Abstract: An oxygen storage material including a ceria-zirconia based composite oxide containing a composite oxide of ceria and zirconia, wherein the ceria-zirconia based composite oxide comprises at least one rare-earth element selected from the group consisting of lanthanum, yttrium, and neodymium, and an amount of the rare-earth element(s) contained in total is 1 to 10% by atom in terms of element relative to a total amount of cerium and zirconium in the ceria-zirconia based composite oxide, 60 to 85% by atom of the entire amount of the rare-earth element(s) is contained in a near-surface upper-layer region extending from a surface of each primary particle of the ceria-zirconia based composite oxide to a depth of 50 nm in the primary particle, and 15 to 40% by atom of the entire amount of the rare-earth element(s) is contained in a near-surface lower-layer region extending from a depth of 50 nm to a depth of 100 nm in the primary particle, a content ratio of cerium and zirconium in the ceria-zirconia based composType: GrantFiled: October 8, 2019Date of Patent: January 24, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akira Morikawa, Masahide Miura, Nobuyuki Takagi
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Publication number: 20220307404Abstract: The present disclosure provides an exhaust gas purification material and an exhaust gas purification device that can efficiently remove harmful components even after being exposed to high temperature. Such exhaust gas purification material comprises metal oxide particles and noble metal particles supported on the metal oxide particles. The noble metal particles have a particle size distribution with a mean of 1.5 nm and 18 nm and a standard deviation of less than 1.6 nm.Type: ApplicationFiled: March 24, 2022Publication date: September 29, 2022Inventors: Norimichi SHIMANO, Taizo YOSHINAGA, Shogo SHIRAKAWA, Nobuyuki TAKAGI, Masahide MIURA
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Publication number: 20220134313Abstract: A supported catalyst particles include oxide carrier particles and noble metal particles supported on the oxide carrier particles, wherein the mass of the noble metal particles is less than or equal to 5 mass % based on the mass of the oxide carrier particles, and the average particle size of the noble metal particles measured by transmission electron microscopy is 1.0-2.0 nm, with the standard deviation ? less than or equal to 0.8 nm.Type: ApplicationFiled: February 12, 2020Publication date: May 5, 2022Applicants: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki NIHASHI, Shogo KAWAMURA, Tomomasa AIKAWA, Isao NAITO, Shogo SHIRAKAWA, Masahide MIURA, Nobuyuki TAKAGI, Norimichi SHIMANO
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Publication number: 20210277814Abstract: An exhaust gas purification catalyst including an alkaline-earth metal carried on a porous carrier in a highly dispersed state. The catalyst layer of the exhaust gas purification catalyst has an alkaline-earth metal carrying region including a porous carrier, Pt, and a sulfuric acid salt of at least one alkaline-earth metal carried on the porous carrier, wherein a value of RAe/Pt is 0.5 or more, where RAe/Pt represents the Pearson's correlation coefficient calculated using ? and ? in each pixel obtained by, for a cross section of the region, performing the area analysis by FE-EPMA under the conditions of: pixel size 0.34 ?m×0.34 ?m; and number of measured pixels 256×256; and measuring an intensity (?: cps) of a characteristic X ray of an element (Ae) of the alkaline-earth metal and an intensity (?: cps) of a characteristic X ray of Pt for each pixel.Type: ApplicationFiled: September 9, 2019Publication date: September 9, 2021Applicants: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shogo KAWAMURA, Tomomasa AIKAWA, Isao NAITO, Hiroki NIHASHI, Nobuyuki TAKAGI, Takeshi NOBUKAWA
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Publication number: 20200263056Abstract: A polishing composition include a compound represented by the following formula (1), a cerium oxide particle, and water. R1 is S?, SR11 where R11 is a hydrogen atom or a hydrocarbon group optionally containing a hetero atom, N?R12 where R12 is a hydrogen atom or a hydrocarbon group optionally containing a hetero atom, NR13R14 where R13 and R14 are each independently a hydrogen atom or a hydrocarbon group optionally containing a hetero atom, or R13 and R14 are combined with each other to form a heterocycle, or N=NR15 where R15 is a hydrocarbon group; R2 is a hydrocarbon group optionally containing a hetero atom; X+ is a monovalent cation; n is 1 in the case where R1 is S? or N?R12 and is 0 in the case where R1 is other than S? and N?R12.Type: ApplicationFiled: February 14, 2020Publication date: August 20, 2020Applicant: AGC INC.Inventors: Masatoshi AKAJI, Nobuyuki TAKAGI, Tomoo KATO
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Patent number: 10668449Abstract: An oxygen storage material comprises a Ce—Zr-Ln-Ti-based composite oxide containing cerium (Ce), zirconium (Zr), a rear-earth element (Ln: excluding cerium), and titanium (Ti), wherein at least part of the rear-earth element and at least part of the titanium are solid-dissolved in a composite oxide of the cerium and the zirconium, and the Ce—Zr-Ln-Ti-based composite oxide has a composition expressed by the following chemical formula (1): Cea-xLnxZrb-yTiyO???(1), where a, b, x, and y are numbers satisfying conditions of a=0.4 to 0.6, b=0.4 to 0.6, x=0 to a (exclusive of x=0 and x=a), y=0 to 0.3 (exclusive of y=0), and a+b=1, and ? is a number of 1.7 to 2.2.Type: GrantFiled: April 24, 2019Date of Patent: June 2, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshihiro Goto, Akira Morikawa, Masahide Miura, Nobuyuki Takagi
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Patent number: 10625246Abstract: An oxygen storage material comprises a La—Co—Al-based composite oxide containing lanthanum, cobalt and aluminum. The La—Co—Al-based composite oxide is in a form in which at least part of the aluminum is solid-dissolved in a La—Co composite oxide having a perovskite structure, and has a composition expressed by the following chemical formula (1): LaCoyAlxO???(1) where x and y are numbers satisfying conditions of 0<x <1 and 0<y<1, where x+y=0.5 to 1.5, and ? is a number of 1.5 to 4.5.Type: GrantFiled: April 24, 2019Date of Patent: April 21, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshihiro Goto, Akira Morikawa, Masahide Miura, Nobuyuki Takagi
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Publication number: 20200114334Abstract: An oxygen storage material including a ceria-zirconia based composite oxide containing a composite oxide of ceria and zirconia, wherein the ceria-zirconia based composite oxide comprises at least one rare-earth element selected from the group consisting of lanthanum, yttrium, and neodymium, and an amount of the rare-earth element(s) contained in total is 1 to 10% by atom in terms of element relative to a total amount of cerium and zirconium in the ceria-zirconia based composite oxide, 60 to 85% by atom of the entire amount of the rare-earth element(s) is contained in a near-surface upper-layer region extending from a surface of each primary particle of the ceria-zirconia based composite oxide to a depth of 50 nm in the primary particle, and 15 to 40% by atom of the entire amount of the rare-earth element(s) is contained in a near-surface lower-layer region extending from a depth of 50 nm to a depth of 100 nm in the primary particle, a content ratio of cerium and zirconium in the ceria-zirconia based composType: ApplicationFiled: October 8, 2019Publication date: April 16, 2020Inventors: Akira MORIKAWA, Masahide MIURA, Nobuyuki TAKAGI
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Publication number: 20190321807Abstract: An oxygen storage material comprises a La—Co—Al-based composite oxide containing lanthanum, cobalt and aluminum. The La—Co—Al-based composite oxide is in a form in which at least part of the aluminum is solid-dissolved in a La—Co composite oxide having a perovskite structure, and has a composition expressed by the following chemical formula (1): LaCoyAlxO???(1) where x and y are numbers satisfying conditions of 0<x <1 and 0<y<1, where x+y=0.5 to 1.5, and ? is a number of 1.5 to 4.5.Type: ApplicationFiled: April 24, 2019Publication date: October 24, 2019Inventors: Yoshihiro Goto, Akira Morikawa, Masahide Miura, Nobuyuki Takagi
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Publication number: 20190321806Abstract: An oxygen storage material comprises a Ce—Zr-Ln-Ti-based composite oxide containing cerium (Ce), zirconium (Zr), a rear-earth element (Ln: excluding cerium), and titanium (Ti), wherein at least part of the rear-earth element and at least part of the titanium are solid-dissolved in a composite oxide of the cerium and the zirconium, and the Ce—Zr-Ln-Ti-based composite oxide has a composition expressed by the following chemical formula (1): Cea-xLnxZrb-yTiyO???(1), where a, b, x, and y are numbers satisfying conditions of a=0.4 to 0.6, b=0.4 to 0.6, x=0 to a (exclusive of x=0 and x=a), y=0 to 0.3 (exclusive of y=0), and a+b=1, and ? is a number of 1.7 to 2.2.Type: ApplicationFiled: April 24, 2019Publication date: October 24, 2019Inventors: Yoshihiro GOTO, Akira MORIKAWA, Masahide MIURA, Nobuyuki TAKAGI