Patents by Inventor Yoshinori Saito

Yoshinori Saito 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).

  • Patent number: 11286830
    Abstract: The exhaust gas cleaning catalyst according is provided with a substrate and a catalyst coat layer formed on a surface of the substrate. The catalyst coat layer is formed as a laminate structure having an upper layer and a lower layer. The upper layer is a Pd-free layer that does not contain Pd, and the lower layer is a Pd-containing layer. In addition, when a region of the lower layer that corresponds to 20% of the length of the exhaust gas cleaning catalyst from the exhaust gas inlet side end towards the exhaust gas outlet side of the exhaust gas cleaning catalyst is divided into four equal regions to be each 5% of the length, the relationship A>B>C is satisfied, where A, B, and C represents the Pd content in the first, second, and third region respectively.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: March 29, 2022
    Assignees: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshinori Saito, Hirotaka Ori, Shingo Sakagami, Isao Chinzei, Takeru Yoshida, Yuki Aoki
  • Patent number: 11224840
    Abstract: An object of the present invention is to provide an exhaust gas purification catalyst which can exhibit sufficient purification performance even under a high Ga condition. The present invention relates to an exhaust gas purification catalyst comprising a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises catalyst particles, the catalyst coating layer having an upstream region extending by 40 to 60% of the entire length of the substrate from an upstream end of the catalyst in the direction of an exhaust gas flow and a downstream region corresponding to the remainder portion of the catalyst coating layer, the composition of the catalyst particle of the upstream region being different from that of the downstream region.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: January 18, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATAIER CORPORATION
    Inventors: Hiromasa Suzuki, Masahide Miura, Yoshinori Saito, Satoru Katoh, Toshitaka Tanabe, Tetsuhiro Hirao, Tatsuya Ohashi, Hiroaki Naito, Hirotaka Ori, Michihiko Takeuchi, Keiichi Narita
  • Publication number: 20210094027
    Abstract: The exhaust gas purification catalyst device includes an upper layer which includes first carrier particles and rhodium, and a lower layer which includes second carrier particles, and the upper layer includes a rhodium enriched area in the range a, from the upstream end in the exhaust gas flow to 50% of the upper layer length, and a range b from the upper layer top surface to 18 ?m in the depth direction. The rhodium enriched area contains at least 50% and less than 100% of all the rhodium in the upper layer.
    Type: Application
    Filed: January 25, 2019
    Publication date: April 1, 2021
    Applicants: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shunsuke OISHI, Takaya OTA, Isao CHINZEI, Hiromasa SUZUKI, Yoshinori SAITO, Seiji NAKAHIGASHI
  • Publication number: 20200376467
    Abstract: This exhaust gas purification catalyst device includes an upper layer which includes first carrier particles and rhodium, and a lower layer which includes second carrier particles, and the upper layer includes a rhodium enriched area in the range a, from the downstream end in the exhaust gas flow to greater than 50% and up to 80% of the upper layer length, and a range b from the upper layer top surface less than 20 ?m in the depth direction. The rhodium enriched area contains at least 50% and less than 100% of all the rhodium in the upper layer.
    Type: Application
    Filed: January 29, 2019
    Publication date: December 3, 2020
    Applicants: CATALER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shunsuke OISHI, Takaya OTA, Yoshinori SAITO, Seiji NAKAHIGASHI, Isao CHINZEI, Hiromasa SUZUKI
  • Patent number: 10731532
    Abstract: The problem of the present invention is to provide an exhaust gas purification catalyst which can exhibit sufficient purification performance under a high Ga condition while having a resistance to stress such as high-temperature and poisonous substances. The present invention relates to an exhaust gas purification catalyst comprising two or more catalyst coating layers on a substrate, wherein a lower catalyst coating layer that is present lower with respect to an uppermost catalyst coating layer has a structure where a large number of voids are included and high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain proportion or more of the whole volume of voids, thereby to improve gas diffusivity in the lower catalyst coating layer.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: August 4, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Hiromasa Suzuki, Masahide Miura, Yoshinori Saito, Satoru Katoh, Toshitaka Tanabe, Tetsuhiro Hirao, Tatsuya Ohashi, Hiroaki Naito, Hirotaka Ori, Michihiko Takeuchi, Keiichi Narita
  • Patent number: 10576420
    Abstract: The object of the present invention is to provide an exhaust gas purifying catalyst that can achieve high purification performance while suppressing H2S emissions. The object is solved by an exhaust gas purifying catalyst in which the lower layer of the catalyst coating layer comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % in relation to the total cation amount, and the molar ratio of (cerium+additional element):(zirconium) is within the range from 43:57 to 48:52.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: March 3, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Isao Chinzei, Hiromasa Suzuki, Takeru Yoshida, Masahide Miura, Yuki Aoki, Mitsuyoshi Okada, Toshitaka Tanabe, Akihiko Suda, Yoshinori Saito, Hirotaka Ori, Kosuke Iizuka, Akira Morikawa
  • Patent number: 10556223
    Abstract: The object of the present invention is to provide an exhaust gas purifying catalyst that can achieve high purification performance while suppressing H2S emissions. The object is solved by an exhaust gas purifying catalyst in which the top layer of a catalyst coating layer comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % in relation to the total cation amount, and the molar ratio of (cerium+additional element):(zirconium) is within the range from 43:57 to 48:52.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: February 11, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Hiromasa Suzuki, Takeru Yoshida, Masahide Miura, Yuki Aoki, Isao Chinzei, Yoshinori Saito, Daisuke Ochiai, Mitsuyoshi Okada, Toshitaka Tanabe, Akihiko Suda, Masanao Sato, Akiya Chiba, Akira Morikawa, Hirotaka Ori
  • Patent number: 10539056
    Abstract: An object of the present invention is to provide an exhaust gas purification catalyst which can exhibit high durability and warm-up performance. The present invention relates to an exhaust gas purification catalyst comprising a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises catalyst particles, the catalyst coating layer having an upstream region extending by 40 to 60% of the entire length of the substrate from an upstream end of the catalyst in the direction of an exhaust gas flow and a downstream region corresponding to the remainder portion of the catalyst coating layer, the composition of the catalyst particle of the upstream region being different from that of the downstream region. The upstream region in the direction of an exhaust gas flow has a structure where a void is included in a large number, and furthermore high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain percentage or more of the whole volume of voids.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: January 21, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Hiromasa Suzuki, Masahide Miura, Yoshinori Saito, Satoru Katoh, Toshitaka Tanabe, Tetsuhiro Hirao, Tatsuya Ohashi, Hiroaki Naito, Hirotaka Ori, Michihiko Takeuchi, Keiichi Narita
  • Publication number: 20200015400
    Abstract: ‘Tochigi i37 Go’ is a new variety of strawberry bred by crossbreeding variety ‘Tochigi 32 Go’ and ‘09-48-5’ in 2012. The plant may be used, e.g., for cultivation of fruit for consumption. ‘Tochigi i37 Go’ is a high-quality, high-yielding variety having early maturing and high-yielding characteristic, fruit with a taste similar to those of ‘Tochiotome’, a large fruit size, a firm fruit firmness, and adaptability to forcing culture.
    Type: Application
    Filed: April 5, 2019
    Publication date: January 9, 2020
    Inventors: Kobayashi Yasuhiro, Takashi Shigeno, Takashi Ohashi, Akitsugu Hatakeyama, Kazunari Iimura, Tatsuro Nakanishi, Masaaki Ueki, Akina Toyoda, Asami Nagashima, Yoshinori Saito, Risa Tsurumi, Natsumi Kojima, Yukio Ohashi
  • Patent number: 10450917
    Abstract: An object of the present invention is to provide an exhaust gas purification catalyst which can exhibit high durability and warm-up performance. The present invention relates to an exhaust gas purification catalyst comprising a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises catalyst particles, the catalyst coating layer having an upstream region extending by 40 to 60% of the entire length of the substrate from an upstream end of the catalyst in the direction of an exhaust gas flow and a downstream region corresponding to the remainder portion of the catalyst coating layer, the composition of the catalyst particle of the upstream region being different from that of the downstream region. The upstream region in the direction of an exhaust gas flow has a structure where a void is included in a large number, and furthermore high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain percentage or more of the whole volume of voids.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: October 22, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Hiromasa Suzuki, Masahide Miura, Yoshinori Saito, Satoru Katoh, Toshitaka Tanabe, Tetsuhiro Hirao, Tatsuya Ohashi, Hiroaki Naito, Hirotaka Ori, Michihiko Takeuchi, Keiichi Narita
  • Patent number: 10413895
    Abstract: When the amount of coating is increased in a two-layer catalyst or the like containing two noble metals in respective different layers, gas diffusivity in the catalyst and use efficiency of a catalytic active site are reduced to thereby reduce purification performance. In view of this, an organic fiber having a predetermined shape is used as a pore-forming material in formation of an uppermost catalyst coating layer of a multi-layer catalyst, to thereby form an uppermost catalyst coating layer having a high-aspect-ratio pore excellent in connectivity and therefore excellent gas diffusivity.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: September 17, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Hiromasa Suzuki, Masahide Miura, Yoshinori Saito, Satoru Katoh, Toshitaka Tanabe, Tetsuhiro Hirao, Tatsuya Ohashi, Hiroaki Naito, Hirotaka Ori, Michihiko Takeuchi, Keiichi Narita
  • Patent number: 10413885
    Abstract: The exemplary embodiments relate to an exhaust gas purification catalyst that is excellent in terms of HC purification capacity and warm-up performance.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: September 17, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Hiromasa Suzuki, Yoshinori Saito, Tatsuya Ohashi, Shunsuke Ohishi, Takaya Ota
  • Patent number: 10384163
    Abstract: The object of the present invention is to provide an exhaust gas purifying catalyst that can achieve high purification performance while suppressing H2S emissions. The object is solved by an exhaust gas purifying catalyst in which the lower layer of the catalyst coating layer comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % in relation to the total cation amount, and the molar ratio of (cerium+additional element):(zirconium) is within the range from 43:57 to 48:52.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: August 20, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Isao Chinzei, Hiromasa Suzuki, Takeru Yoshida, Masahide Miura, Yuki Aoki, Mitsuyoshi Okada, Toshitaka Tanabe, Akihiko Suda, Yoshinori Saito, Hirotaka Ori, Kosuke Iizuka, Akira Morikawa
  • Patent number: 10323554
    Abstract: The present invention is directed to address the following problem: in an exhaust gas purification catalyst comprising a dual catalyst of a combination of a startup catalyst and an underfloor catalyst, reduction in the gas diffusivity of the underfloor catalyst results in reduction in the use efficiency of a catalytic active site, resulting in reduction in purification performance. The present invention relates to an exhaust gas purification catalyst comprising a dual catalyst of a combination of a startup catalyst and an underfloor catalyst having a catalyst coating where a large number of voids are included, wherein high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain rate or more of the whole volume of the voids, to thereby enhance the purification performance of the catalyst.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: June 18, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Hiromasa Suzuki, Masahide Miura, Yoshinori Saito, Satoru Katoh, Toshitaka Tanabe, Tetsuhiro Hirao, Tatsuya Ohashi, Hiroaki Naito, Hirotaka Ori, Michihiko Takeuchi, Keiichi Narita
  • Patent number: 10322406
    Abstract: The object of the present invention is to provide an exhaust gas purifying catalyst that can achieve high purification performance while suppressing H2S emissions. The object is solved by an exhaust gas purifying catalyst in which the top layer of a catalyst coating layer comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % in relation to the total cation amount, and the molar ratio of (cerium+additional element):(zirconium) is within the range from 43:57 to 48:52.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: June 18, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Hiromasa Suzuki, Takeru Yoshida, Masahide Miura, Yuki Aoki, Isao Chinzei, Yoshinori Saito, Daisuke Ochiai, Mitsuyoshi Okada, Toshitaka Tanabe, Akihiko Suda, Masanao Sato, Akiya Chiba, Akira Morikawa, Hirotaka Ori
  • Patent number: 10307736
    Abstract: An exhaust gas purification catalyst, excellent in the NOx purification capacity and the HC purification capacity, includes a substrate and a catalyst coating layer formed on the surface of the substrate, wherein the catalyst coating layer comprises the upper and lower layer including a lower layer being closer to the surface of the substrate and an upper layer being relatively remote from the surface of the substrate. The upper layer of the catalyst coating layer includes Rh, Pd, and a carrier. The lower layer of the catalyst coating layer includes at least one noble metal selected from Pd and Pt and a carrier. 65% by mass or more of Pd in the upper layer exists in a layer up to 50% of the upper layer in a thickness direction from the surface of the upper layer being relatively remote from the surface of the substrate. The ratio of Pd to Rh by mass (Pd/Rh) is 0.5 to 7.0 in the upper layer.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: June 4, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Yoshinori Saito, Hiromasa Suzuki, Tatsuya Ohashi, Keiichi Narita, Ryota Nakashima, Mitsuyoshi Okada, Ryosuke Takasu, Shunsuke Oishi
  • Publication number: 20190105637
    Abstract: The exemplary embodiments relate to an exhaust gas purification catalyst that is excellent in terms of HC purification capacity and warm-up performance.
    Type: Application
    Filed: October 4, 2018
    Publication date: April 11, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Hiromasa SUZUKI, Yoshinori SAITO, Tatsuya OHASHI, Shunsuke OHISHI, Takaya OTA
  • Publication number: 20180304238
    Abstract: An exhaust gas purification catalyst having a substrate and a catalyst coating layer formed on the surface of the substrate, wherein the catalyst coating layer has the upper and lower layer having a lower layer closer to the surface of the substrate and an upper layer relatively remote from the surface of the substrate, the upper layer of the catalyst coating layer having Rh, Pd, and a carrier, the lower layer of the catalyst coating layer having at least one noble metal selected from Pd and Pt and a carrier, 65% by mass or more of Pd in the upper layer exists in a layer up to 50% of the upper layer in a thickness direction from the surface of the upper layer being relatively remote from the surface of the substrate, and the ratio of Pd to Rh by mass (Pd/Rh) is 0.5 to 0.7 in the upper layer.
    Type: Application
    Filed: March 27, 2018
    Publication date: October 25, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Yoshinori SAITO, Hiromasa SUZUKI, Tatsuya OHASHI, Keiichi NARITA, Ryota NAKASHIMA, Mitsuyoshi OKADA, Ryosuke TAKASU, Shunsuke OISHI
  • Publication number: 20180252132
    Abstract: An object of the present invention is to provide an exhaust gas purification catalyst which can exhibit high durability and warm-up performance. The present invention relates to an exhaust gas purification catalyst comprising a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises catalyst particles, the catalyst coating layer having an upstream region extending by 40 to 60% of the entire length of the substrate from an upstream end of the catalyst in the direction of an exhaust gas flow and a downstream region corresponding to the remainder portion of the catalyst coating layer, the composition of the catalyst particle of the upstream region being different from that of the downstream region. The upstream region in the direction of an exhaust gas flow has a structure where a void is included in a large number, and furthermore high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain percentage or more of the whole volume of voids.
    Type: Application
    Filed: March 24, 2016
    Publication date: September 6, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CATALER CORPORATION
    Inventors: Hiromasa SUZUKI, Masahide MIURA, Yoshinori SAITO, Satoru KATOH, Toshitaka TANABE, Tetsuhiro HIRAO, Tatsuya OHASHI, Hiroaki NAITO, Hirotaka ORI, Michihiko TAKEUCHI, Keiichi NARITA
  • Patent number: PP32077
    Abstract: ‘Tochigi i37 Go’ is a new variety of strawberry bred by crossbreeding variety ‘Tochigi 32 Go’ and ‘09-48-5’ in 2012. The plant may be used, e.g., for cultivation of fruit for consumption. ‘Tochigi i37 Go’ is a high-quality, high-yielding variety having early maturing and high-yielding characteristic, fruit with a taste similar to those of ‘Tochiotome’, a large fruit size, a firm fruit firmness, and adaptability to forcing culture.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: August 18, 2020
    Assignee: TOCHIGI PREFECTURE
    Inventors: Yasuhiro Kobayashi, Takashi Shigeno, Takashi Ohashi, Akitsugu Hatakeyama, Kazunari Iimura, Tatsuro Nakanishi, Masaaki Ueki, Akina Toyoda, Asami Nagashima, Yoshinori Saito, Risa Tsurumi, Natsumi Kojima, Yukio Ohashi