Patents by Inventor Hiromi TOGASHI
Hiromi TOGASHI 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: 11719144Abstract: The present disclosure provides an exhaust gas purification catalyst having improved durability, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the downstream portion contains Rh fine particles, and wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation ? of the particle size of 0.8 nm or less.Type: GrantFiled: December 14, 2020Date of Patent: August 8, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Norimichi Shimano, Shogo Shirakawa, Masahide Miura, Isao Chinzei, Seiji Nakahigashi, Hiroki Nihashi, Hiromi Togashi, Tomomasa Aikawa, Isao Naito
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Publication number: 20230078076Abstract: In accordance with the technology herein disclosed, an exhaust gas purification catalyst exhibiting a high exhaust gas purifying performance using a new rare earth-containing material is provided. The exhaust gas purification catalyst herein disclosed includes a base material and a catalyst layer formed on the surface of the base material. The catalyst layer of such an exhaust gas purification catalyst includes rare earth-carrying alumina 50 including a primary particle of a rare earth particle 40 including at least one rare earth element carried on the surface of an alumina carrier 30 including alumina, and the average particle diameter D50 based on TEM observation of the rare earth particle 40 in the rare earth-carrying alumina 50 is 10 nm or less.Type: ApplicationFiled: December 7, 2020Publication date: March 16, 2023Inventors: Shunsuke Oishi, Takaya Ota, Taku Miura, Hiromi Togashi, Ryosuke Takasu
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Patent number: 11577226Abstract: The present disclosure provides an exhaust gas purification catalyst having an improved Rh activation, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the upstream portion contains Rh fine particles and Pt, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation ? of the particle size of 0.8 nm or less, and wherein the downstream portion contains Rh.Type: GrantFiled: December 1, 2020Date of Patent: February 14, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Seiji Nakahigashi, Isao Chinzei, Shogo Shirakawa, Hiromasa Suzuki, Masahide Miura, Takahiro Nishio, Norimichi Shimano, Hiroki Nihashi, Mitsuyoshi Okada, Takashi Onozuka, Souta Akiyama, Hiromi Togashi, Takahiro Noguchi, Isao Naito
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Patent number: 11426710Abstract: The present disclosure relates to an exhaust gas control catalyst including a base and a catalyst coating layer having a two-layer structure on the base. The catalyst coating layer includes a lower layer on the base, and an upper layer on the lower layer. The upper layer of the catalyst coating layer contains Rh particles in which a mean particle diameter measured by observation using a transmission electron microscope is 1.0 nm or more and 2.0 nm or less and a particle-diameter standard deviation ? is 0.8 nm or less. A length of the upper layer from an end face on a downstream side in an exhaust gas flow direction falls within a range of 70% or more and 100% or less of a total length of the base.Type: GrantFiled: November 4, 2020Date of Patent: August 30, 2022Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Takahiro Nishio, Shogo Shirakawa, Masahide Miura, Isao Chinzei, Seiji Nakahigashi, Norimichi Shimano, Hiromi Togashi, Hiroki Nihashi, Mitsuyoshi Okada, Takashi Onozuka, Souta Akiyama, Isao Naito
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Patent number: 11400436Abstract: The present disclosure provides an exhaust gas purification catalyst having an improved low-temperature activity, which comprises a substrate and a catalyst coat layer formed on the substrate, wherein the catalyst coat layer contains Rh fine particles and a promoter comprising a Ce—Zr-based composite oxide and a Zr-based composite oxide not containing cerium oxide, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation ? of the particle size of 0.8 nm or less, and wherein the Rh fine particles are supported on each of the Ce—Zr-based composite oxide and the Zr-based composite oxide not containing cerium oxide.Type: GrantFiled: November 30, 2020Date of Patent: August 2, 2022Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Isao Chinzei, Seiji Nakahigashi, Shogo Shirakawa, Hiromasa Suzuki, Masahide Miura, Takahiro Nishio, Norimichi Shimano, Hiroki Nihashi, Hiromi Togashi, Mitsuyoshi Okada, Takashi Onozuka, Souta Akiyama, Isao Naito
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Publication number: 20210205790Abstract: The present disclosure provides an exhaust gas purification catalyst having an improved Rh activation, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the upstream portion contains Rh fine particles and Pt, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation ? of the particle size of 0.8 nm or less, and wherein the downstream portion contains Rh.Type: ApplicationFiled: December 1, 2020Publication date: July 8, 2021Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Seiji NAKAHIGASHI, Isao CHINZEI, Shogo SHIRAKAWA, Hiromasa SUZUKI, Masahide MIURA, Takahiro NISHIO, Norimichi SHIMANO, Hiroki NIHASHI, Mitsuyoshi OKADA, Takashi ONOZUKA, Souta AKIYAMA, Hiromi TOGASHI, Takahiro NOGUCHI, Isao NAITO
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Publication number: 20210199037Abstract: The present disclosure provides an exhaust gas purification catalyst having improved durability, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the downstream portion contains Rh fine particles, and wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation a of the particle size of 0.8 nm or less.Type: ApplicationFiled: December 14, 2020Publication date: July 1, 2021Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Norimichi Shimano, Shogo Shirakawa, Masahide Miura, Isao Chinzei, Seiji Nakahigashi, Hiroki Nihashi, Hiromi Togashi, Tomomasa Aikawa, Isao Naito
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Publication number: 20210197175Abstract: The present disclosure relates to an exhaust gas control catalyst including a base and a catalyst coating layer having a two-layer structure on the base. The catalyst coating layer includes a lower layer on the base, and an upper layer on the lower layer. The upper layer of the catalyst coating layer contains Rh particles in which a mean particle diameter measured by observation using a transmission electron microscope is 1.0 nm or more and 2.0 nm or less and a particle-diameter standard deviation ? is 0.8 nm or less. A length of the upper layer from an end face on a downstream side in an exhaust gas flow direction falls within a range of 70% or more and 100% or less of a total length of the base.Type: ApplicationFiled: November 4, 2020Publication date: July 1, 2021Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Takahiro NISHIO, Shogo SHIRAKAWA, Masahide MIURA, Isao CHINZEI, Seiji NAKAHIGASHI, Norimichi SHIMANO, Hiromi TOGASHI, Hiroki NIHASHI, Mitsuyoshi OKADA, Takashi ONOZUKA, Souta AKIYAMA, Isao NAITO
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Publication number: 20210197176Abstract: The present disclosure provides an exhaust gas purification catalyst having an improved low-temperature activity, which comprises a substrate and a catalyst coat layer formed on the substrate, wherein the catalyst coat layer contains Rh fine particles and a promoter comprising a Ce—Zr-based composite oxide and a Zr-based composite oxide not containing cerium oxide, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation a of the particle size of 0.8 nm or less, and wherein the Rh fine particles are supported on each of the Ce—Zr-based composite oxide and the Zr-based composite oxide not containing cerium oxide.Type: ApplicationFiled: November 30, 2020Publication date: July 1, 2021Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATIONInventors: Isao CHINZEI, Seiji NAKAHIGASHI, Shogo SHIRAKAWA, Hiromasa SUZUKI, Masahide MIURA, Takahiro NISHIO, Norimichi SHIMANO, Hiroki NIHASHI, Hiromi TOGASHI, Mitsuyoshi OKADA, Takashi ONOZUKA, Souta AKIYAMA, Isao NAITO