Patents by Inventor Katsuo Suga
Katsuo Suga 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: 9080491Abstract: The present invention provides an exhaust gas purifying catalyst that can keep high catalytic performance even being subjected to exhaust gas. The exhaust gas purifying catalyst includes: noble metal particles (7); and supports (3), each support supporting the noble metal particles (7), wherein at least a certain amount of the noble metal particles (7) is provided on an outermost surface of the support (3), or provided within a range of 10% inside of a diameter of the support (3) from the outermost surface in a direction toward a center of the support.Type: GrantFiled: November 14, 2007Date of Patent: July 14, 2015Assignees: NISSAN MOTOR CO., LTD., RENAULT S.A.S. SOCIETE PAR ACTIONS SIMPLIFIEEInventors: Masato Nagata, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga
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Patent number: 9073044Abstract: An object is to maintain an effect of enhancing activity of noble metal particles by transition metal without increasing production cost and an environmental load. An exhaust gas purifying catalyst 1 is composed of: noble metal particles 2; first compounds 3 which contact the noble metal particles 2 and suppress movement of the noble metal particles 2; and second compounds 4 which contain the noble metal particles 2 and the first compounds 3, suppress the movement of the noble metal particles 2, and suppress coagulation of the first compounds 3 following mutual contact of the first compounds 3, wherein the first compounds 3 support the noble metal particles 2, and simplexes or aggregates of the first compounds 3 supporting the noble metal particles 2 are included in section partitioned by the second compounds 4.Type: GrantFiled: February 19, 2013Date of Patent: July 7, 2015Assignees: NISSAN MOTOR CO., LTD., RENAULT S.A.S.Inventors: Masanori Nakamura, Katsuo Suga, Hironori Wakamatsu, Kazuyuki Shiratori, Hirofumi Yasuda, Makoto Aoyama, Jun Ikezawa
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Patent number: 8877675Abstract: An exhaust gas purifying catalyst includes: a catalyst particle unit having at least noble metal with a catalytic function, first oxides on which the catalyst noble metal is supported, and second oxides covering the first oxides on which the noble metal is supported. In catalyst powder formed of an aggregate of plural pieces of the catalyst particle units, at least one type of compounds selected from the group consisting of a transition element, an alkali earth metal element, an alkali metal element, and a rare earth element, which is a promoter component, are contained.Type: GrantFiled: January 9, 2008Date of Patent: November 4, 2014Assignee: Nissan Motor Co., Ltd.Inventors: Masanori Nakamura, Hironori Wakamatsu, Tetsuro Naito, Katsuo Suga, Hiroto Kikuchi, Kazuyuki Shiratori
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Patent number: 8846271Abstract: An electrode material, including: catalyst particles formed by performing inclusion, by a porous inorganic material, for a conductive support and metal particles arranged on the conductive support and/or metal particles brought into contact with the conductive support.Type: GrantFiled: May 25, 2007Date of Patent: September 30, 2014Assignees: Nissan Motor Co., Ltd., Kyushu University, National University CorporationInventors: Kenzo Oshihara, Katsuo Suga, Masahiro Kishida, Sakae Takenaka
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Patent number: 8609578Abstract: An exhaust gas purifying catalyst is constituted by: noble metal particles (1); first compounds (2) which support the noble metal particles (1); second compounds (3) different in type from the first compounds (2); and oxides (4) which surround the noble metal particles (1), the first compounds (2) and the second compounds (3). A median diameter of the first compounds (2) and a median diameter of the second compounds (3) satisfy a relationship of a following inequality: median diameter of first compounds<median diameter of second compounds.Type: GrantFiled: June 30, 2009Date of Patent: December 17, 2013Assignee: Nissan Motor Co., Ltd.Inventors: Masanori Nakamura, Yoshiaki Hiramoto, Hiroto Kikuchi, Hironori Wakamatsu, Kazuyuki Shiratori, Tetsuro Naito, Katsuo Suga
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Patent number: 8486853Abstract: An exhaust gas purifying catalyst (1) according to the present invention includes noble metal particles (6), a first compound (7) supporting the noble metal particles (6), and a second compound (9) disposed not in contact with the noble metal particles (6) and having an oxygen storage capacity. An average distance between the first compound (7) and the second compound (9) is between 5 nm and 300 nm.Type: GrantFiled: March 4, 2010Date of Patent: July 16, 2013Assignee: Nissan Motor Co., Ltd.Inventors: Kazuyuki Shiratori, Katsuo Suga, Masanori Nakamura, Hironori Wakamatsu, Hiroto Kikuchi, Tetsuro Naito, Jun Ikezawa
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Publication number: 20130157844Abstract: An object is to maintain an effect of enhancing activity of noble metal particles by transition metal without increasing production cost and an environmental load. An exhaust gas purifying catalyst 1 is composed of: noble metal particles 2; first compounds 3 which contact the noble metal particles 2 and suppress movement of the noble metal particles 2; and second compounds 4 which contain the noble metal particles 2 and the first compounds 3, suppress the movement of the noble metal particles 2, and suppress coagulation of the first compounds 3 following mutual contact of the first compounds 3, wherein the first compounds 3 support the noble metal particles 2, and simplexes or aggregates of the first compounds 3 supporting the noble metal particles 2 are included in section partitioned by the second compounds 4.Type: ApplicationFiled: February 19, 2013Publication date: June 20, 2013Inventors: Masanori NAKAMURA, Katsuo Suga, Hironori Wakamatsu, Kazuyuki Shiratori, Hirofumi Yasuda, Makoto Aoyama, Jun Ikezawa
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Patent number: 8455390Abstract: An exhaust gas purifying catalyst includes a monolithic substrate (2), and a transition metal oxide layer (3) formed in the monolithic substrate (2). The transition metal oxide layer (3) contains transition metal oxide powder including: transition metal oxide particles (10); a first compound (20) on which the transition metal oxide particles (10) are supported; and a second compound (30) that surrounds a single body or an aggregate of the transition metal oxide particles (10) and the first compound (20).Type: GrantFiled: June 23, 2009Date of Patent: June 4, 2013Assignee: Nissan Motor Co., Ltd.Inventors: Hiroto Kikuchi, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga, Toshiharu Miyamura, Jun Ikezawa, Tetsuro Naito, Junji Ito
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Patent number: 8404611Abstract: An object is to maintain an effect of enhancing activity of noble metal particles by transition metal without increasing production cost and an environmental load. An exhaust gas purifying catalyst 1 is composed of: noble metal particles 2; first compounds 3 which contact the noble metal particles 2 and suppress movement of the noble metal particles 2; and second compounds 4 which contain the noble metal particles 2 and the first compounds 3, suppress the movement of the noble metal particles 2, and suppress coagulation of the first compounds 3 following mutual contact of the first compounds 3, wherein the first compounds 3 support the noble metal particles 2, and simplexes or aggregates of the first compounds 3 supporting the noble metal particles 2 are included in section partitioned by the second compounds 4.Type: GrantFiled: October 31, 2006Date of Patent: March 26, 2013Assignees: Nissan Motor Co., Ltd., Renault S.A.S.Inventors: Masanori Nakamura, Katsuo Suga, Hironori Wakamatsu, Kazuyuki Shiratori, Hirofumi Yasuda, Makoto Aoyama, Jun Ikezawa
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Patent number: 8309487Abstract: An exhaust gas purifying catalyst (1) is composed of: a noble metal (2); a first compound (3); and a second compound (4). The noble metal (2) is supported on the first compound (3). The exhaust gas purifying catalyst (1) includes units having a structure in which the first compound (3) supporting the noble metal (2) is surrounded by the second compound (4), and the first compound (3) supporting the noble metal (2) is isolated from one another by the second compound (4). The noble metal (2) is one or more selected from [Pt, Pd and Rh], the first compound (3) contains Ti as a main component, and the second compound (4) contains, as a main component, one or more selected from [Al and Si].Type: GrantFiled: June 4, 2009Date of Patent: November 13, 2012Assignee: Nissan Motor Co., Ltd.Inventors: Kazuyuki Shiratori, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga
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Patent number: 8158554Abstract: A high heat-resistant catalyst includes: noble metal particles; first compounds which contact the noble metal particles and suppress movement of the noble metal particles; and second compounds which envelop the noble metal particles and the first compounds, suppress the movement of the noble metal particles, and suppress coagulation of the first compounds following mutual contact of the first compounds. The first compounds support the noble metal particles, and single piece or aggregate of the first compounds supporting the noble metal particles are included in a section partitioned by the second compounds. A coefficient of linear thermal expansion of the second compounds is 1.2×10?5 [K?1] or less.Type: GrantFiled: April 17, 2008Date of Patent: April 17, 2012Assignees: Nissan Motor Co., Ltd., RENAULT s.a.s.Inventors: Hironori Wakamatsu, Masanori Nakamura, Masahiro Takaya, Katsuo Suga, Hiroto Kikuchi, Jun Ikezawa
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Publication number: 20120053050Abstract: An exhaust gas purifying catalyst (1) according to the present invention includes noble metal particles (6), a first compound (7) supporting the noble metal particles (6), and a second compound (9) disposed not in contact with the noble metal particles (6) and having an oxygen storage capacity. An average distance between the first compound (7) and the second compound (9) is between 5 nm and 300 nm.Type: ApplicationFiled: March 4, 2010Publication date: March 1, 2012Inventors: Kazuyuki Shiratori, Katsuo Suga, Masanori Nakamura, Hironori Wakamatsu, Hiroto Kikuchi, Tetsuro Naito, Jun Ikezawa
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Patent number: 8080494Abstract: A catalyst 1 has a heat-resistant support 2 selected from among Al2O3, SiO2, ZrO2, and TiO2, and a first metal 4 supported on an outer surface of the support 2, and included by an inclusion material 3 containing a component of the support 2.Type: GrantFiled: December 5, 2005Date of Patent: December 20, 2011Assignee: Nissan Motor Co., Ltd.Inventors: Hirofumi Yasuda, Katsuo Suga, Makoto Aoyama, Toshiharu Miyamura
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Publication number: 20110177939Abstract: An exhaust gas purifying catalyst is constituted by: noble metal particles (1); first compounds (2) which support the noble metal particles (1); second compounds (3) different in type from the first compounds (2); and oxides (4) which surround the noble metal particles (1), the first compounds (2) and the second compounds (3). A median diameter of the first compounds (2) and a median diameter of the second compounds (3) satisfy a relationship of a following inequality: median diameter of first compounds<median diameter of second compounds.Type: ApplicationFiled: June 30, 2009Publication date: July 21, 2011Inventors: Masanori Nakamura, Yoshiaki Hiramoto, Hiroto Kikuchi, Hironori Wakamatsu, Kazuyuki Shiratori, Tetsuro Naito, Katsuo Suga
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Patent number: 7977276Abstract: Disclosed is an exhaust gas purifying catalyst exhibiting excellent purification performance for a long period of time by suppressing coagulation of a noble metal. A catalyst powder comprises a noble metal and first and second compounds. In the catalyst powder, the first compound carries the noble metal and is separated from another first compound carrying a noble metal by the second compound. At least one catalyst layer comprising the catalyst powder is formed on an inner surface of a substrate. The catalyst layer has fine pores. A fine pore volume of fine pores having a fine pore diameter of greater than 0.1 ?m to less than or equal to 1 ?m is 10% to 60% of the fine pore volume of fine pores having a pore diameter of 1.0 ?m or less.Type: GrantFiled: April 4, 2008Date of Patent: July 12, 2011Assignee: Nissan Motor Co., Ltd.Inventors: Hiroto Kikuchi, Katsuo Suga, Masanori Nakamura, Hironori Wakamatsu, Kazuyuki Shiratori, Toshiharu Miyamura, Jun Ikezawa
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Publication number: 20110111952Abstract: An exhaust gas purifying catalyst (1) is composed of: a noble metal (2); a first compound (3); and a second compound (4). The noble metal (2) is supported on the first compound (3). The exhaust gas purifying catalyst (1) includes units having a structure in which the first compound (3) supporting the noble metal (2) is surrounded by the second compound (4), and the first compound (3) supporting the noble metal (2) is isolated from one another by the second compound (4). The noble metal (2) is one or more selected from [Pt, Pd and Rh], the first compound (3) contains Ti as a main component, and the second compound (4) contains, as a main component, one or more selected from [Al and Si].Type: ApplicationFiled: June 4, 2009Publication date: May 12, 2011Inventors: Kazuyuki Shiratori, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga
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Publication number: 20110094211Abstract: An exhaust gas purifying catalyst includes a monolithic substrate (2), and a transition metal oxide layer (3) formed in the monolithic substrate (2). The transition metal oxide layer (3) contains transition metal oxide powder including: transition metal oxide particles (10); a first compound (20) on which the transition metal oxide particles (10) are supported; and a second compound (30) that surrounds a single body or an aggregate of the transition metal oxide particles (10) and the first compound (20).Type: ApplicationFiled: June 23, 2009Publication date: April 28, 2011Applicant: NISSAN MOTOR CO., LTD.Inventors: Hiroto Kikuchi, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga, Toshiharu Miyamura, Jun Ikezawa, Tetsuro Naito, Junji Ito
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Publication number: 20110034331Abstract: An exhaust gas purifying catalyst including: a plurality of first compounds 5 which have precious metal particles 3 supported thereon and are formed into a particle shape; and second compounds 7 which are arranged among the plurality of first compounds 5 and separate the first compounds 5 from one another, wherein pore volumes of the precious metal particles 3, the first compounds 5 and the second compounds 7 are 0.24 to 0.8 cm3/g.Type: ApplicationFiled: October 13, 2010Publication date: February 10, 2011Inventors: Hiroto KIKUCHI, Masanori Nakamura, Hironori Wakamatsu, Hideaki Morisaka, Hirofumi Yasuda, Katsuo Suga, Kazuyuki Shiratori, Kenji Uesugi, Toshiharu Miyamura
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Patent number: 7851405Abstract: An exhaust gas purifying catalyst that includes noble metal particles, first compounds which support the noble metal particles and suppress movement of the noble metal particles, and second compounds which encapsulate the noble metal particles and the first compounds. The second compounds suppress the movement of the noble metal particles and suppress coagulation of the first compounds following mutual contact of the first compounds.Type: GrantFiled: January 25, 2008Date of Patent: December 14, 2010Assignees: Nissan Motor co., Ltd., Renault s.a.s.Inventors: Hironori Wakamatsu, Maki Shimada, Masanori Nakamura, Katsuo Suga, Hiroto Kikuchi, Tetsuro Naito, Toshiharu Miyamura, Jun Ikezawa
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Patent number: 7833930Abstract: An exhaust gas purifying catalyst including: a plurality of first compounds 5 which have precious metal particles 3 supported thereon and are formed into a particle shape; and second compounds 7 which are arranged among the plurality of first compounds 5 and separate the first compounds 5 from one another, wherein pore volumes of the precious metal particles 3, the first compounds 5 and the second compounds 7 are 0.24 to 0.8 cm3/g.Type: GrantFiled: April 12, 2007Date of Patent: November 16, 2010Assignees: Nissan Motor Co., Ltd., Renault s.a.s.Inventors: Hiroto Kikuchi, Masanori Nakamura, Hironori Wakamatsu, Hideaki Morisaka, Hirofumi Yasuda, Katsuo Suga, Kazuyuki Shiratori, Kenji Uesugi, Toshiharu Miyamura