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).

  • Patent number: 9080491
    Abstract: 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: Grant
    Filed: November 14, 2007
    Date of Patent: July 14, 2015
    Assignees: NISSAN MOTOR CO., LTD., RENAULT S.A.S. SOCIETE PAR ACTIONS SIMPLIFIEE
    Inventors: Masato Nagata, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga
  • Patent number: 9073044
    Abstract: 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: Grant
    Filed: February 19, 2013
    Date of Patent: July 7, 2015
    Assignees: NISSAN MOTOR CO., LTD., RENAULT S.A.S.
    Inventors: Masanori Nakamura, Katsuo Suga, Hironori Wakamatsu, Kazuyuki Shiratori, Hirofumi Yasuda, Makoto Aoyama, Jun Ikezawa
  • Patent number: 8877675
    Abstract: 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: Grant
    Filed: January 9, 2008
    Date of Patent: November 4, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Masanori Nakamura, Hironori Wakamatsu, Tetsuro Naito, Katsuo Suga, Hiroto Kikuchi, Kazuyuki Shiratori
  • Patent number: 8846271
    Abstract: 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: Grant
    Filed: May 25, 2007
    Date of Patent: September 30, 2014
    Assignees: Nissan Motor Co., Ltd., Kyushu University, National University Corporation
    Inventors: Kenzo Oshihara, Katsuo Suga, Masahiro Kishida, Sakae Takenaka
  • Patent number: 8609578
    Abstract: 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: Grant
    Filed: June 30, 2009
    Date of Patent: December 17, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Masanori Nakamura, Yoshiaki Hiramoto, Hiroto Kikuchi, Hironori Wakamatsu, Kazuyuki Shiratori, Tetsuro Naito, Katsuo Suga
  • Patent number: 8486853
    Abstract: 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: Grant
    Filed: March 4, 2010
    Date of Patent: July 16, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kazuyuki Shiratori, Katsuo Suga, Masanori Nakamura, Hironori Wakamatsu, Hiroto Kikuchi, Tetsuro Naito, Jun Ikezawa
  • Publication number: 20130157844
    Abstract: 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: Application
    Filed: February 19, 2013
    Publication date: June 20, 2013
    Inventors: Masanori NAKAMURA, Katsuo Suga, Hironori Wakamatsu, Kazuyuki Shiratori, Hirofumi Yasuda, Makoto Aoyama, Jun Ikezawa
  • Patent number: 8455390
    Abstract: 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: Grant
    Filed: June 23, 2009
    Date of Patent: June 4, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroto Kikuchi, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga, Toshiharu Miyamura, Jun Ikezawa, Tetsuro Naito, Junji Ito
  • Patent number: 8404611
    Abstract: 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: Grant
    Filed: October 31, 2006
    Date of Patent: March 26, 2013
    Assignees: Nissan Motor Co., Ltd., Renault S.A.S.
    Inventors: Masanori Nakamura, Katsuo Suga, Hironori Wakamatsu, Kazuyuki Shiratori, Hirofumi Yasuda, Makoto Aoyama, Jun Ikezawa
  • Patent number: 8309487
    Abstract: 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: Grant
    Filed: June 4, 2009
    Date of Patent: November 13, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kazuyuki Shiratori, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga
  • Patent number: 8158554
    Abstract: 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: Grant
    Filed: April 17, 2008
    Date of Patent: April 17, 2012
    Assignees: Nissan Motor Co., Ltd., RENAULT s.a.s.
    Inventors: Hironori Wakamatsu, Masanori Nakamura, Masahiro Takaya, Katsuo Suga, Hiroto Kikuchi, Jun Ikezawa
  • Publication number: 20120053050
    Abstract: 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: Application
    Filed: March 4, 2010
    Publication date: March 1, 2012
    Inventors: Kazuyuki Shiratori, Katsuo Suga, Masanori Nakamura, Hironori Wakamatsu, Hiroto Kikuchi, Tetsuro Naito, Jun Ikezawa
  • Patent number: 8080494
    Abstract: 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: Grant
    Filed: December 5, 2005
    Date of Patent: December 20, 2011
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hirofumi Yasuda, Katsuo Suga, Makoto Aoyama, Toshiharu Miyamura
  • Publication number: 20110177939
    Abstract: 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: Application
    Filed: June 30, 2009
    Publication date: July 21, 2011
    Inventors: Masanori Nakamura, Yoshiaki Hiramoto, Hiroto Kikuchi, Hironori Wakamatsu, Kazuyuki Shiratori, Tetsuro Naito, Katsuo Suga
  • Patent number: 7977276
    Abstract: 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: Grant
    Filed: April 4, 2008
    Date of Patent: July 12, 2011
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroto Kikuchi, Katsuo Suga, Masanori Nakamura, Hironori Wakamatsu, Kazuyuki Shiratori, Toshiharu Miyamura, Jun Ikezawa
  • Publication number: 20110111952
    Abstract: 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: Application
    Filed: June 4, 2009
    Publication date: May 12, 2011
    Inventors: Kazuyuki Shiratori, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga
  • Publication number: 20110094211
    Abstract: 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: Application
    Filed: June 23, 2009
    Publication date: April 28, 2011
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Hiroto Kikuchi, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga, Toshiharu Miyamura, Jun Ikezawa, Tetsuro Naito, Junji Ito
  • Publication number: 20110034331
    Abstract: 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: Application
    Filed: October 13, 2010
    Publication date: February 10, 2011
    Inventors: Hiroto KIKUCHI, Masanori Nakamura, Hironori Wakamatsu, Hideaki Morisaka, Hirofumi Yasuda, Katsuo Suga, Kazuyuki Shiratori, Kenji Uesugi, Toshiharu Miyamura
  • Patent number: 7851405
    Abstract: 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: Grant
    Filed: January 25, 2008
    Date of Patent: December 14, 2010
    Assignees: 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
  • Patent number: 7833930
    Abstract: 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: Grant
    Filed: April 12, 2007
    Date of Patent: November 16, 2010
    Assignees: 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