Patents by Inventor Keiichi Narita

Keiichi Narita 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: 11946013
    Abstract: A lubricating oil composition which contains a base oil and a fluorine compound and may have improved cooling performance. The base oil may contain a mineral oil. The base oil may have a kinematic viscosity in a range of from 1 to 25 mm2/s at 40° C. The content of the fluorine compound may be in a range of from 3 to 30% by weight based on the total amount of the composition.
    Type: Grant
    Filed: January 15, 2021
    Date of Patent: April 2, 2024
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Yasuhito Nakahara, Hiroyuki Tatsumi, Keiichi Narita, Koki Ito
  • Publication number: 20230302434
    Abstract: Provided is an exhaust gas purification catalyst that includes a base material containing a silicon-silicon carbide composite material and a catalyst layer containing a barium component and that has excellent high-temperature durability of oxygen storage capacity. The exhaust gas purification catalyst disclosed here includes a base material and a catalyst layer in contact with the base material. The base material contains a silicon-silicon carbide composite material. The catalyst layer contains a platinum-group catalyst, a barium component, and an oxygen storage material. The barium component is one material selected from the group consisting of barium and a barium compound. The barium component is present on at least a surface of the oxygen storage material. The barium component has an average particle size of 100 nm or more and 350 nm or less.
    Type: Application
    Filed: July 19, 2021
    Publication date: September 28, 2023
    Inventors: Tatsuya Ohashi, Kohei Takasaki, Yu Onohara, Keiichi Narita
  • Publication number: 20230272297
    Abstract: A lubricating oil composition may have a high flash point, a low pour point, and excellent electrical insulation, while having excellent cooling performance. Such a lubricating oil composition may include a base oil (A), wherein the base oil (A) includes at least one synthetic oil (A1) selected from a polyalkylene glycol having a specific degree of polymerization and a polyvinyl ether having a specific degree of polymerization.
    Type: Application
    Filed: August 23, 2021
    Publication date: August 31, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Akio KOJIMA, Yukio YOSHIDA, Kenichi OGATA, Shota KATO, Keiichi NARITA
  • Publication number: 20230265353
    Abstract: A lubricating oil composition may be superior in cooling performance, ensure electrical insulation, and have a high flash point. Such a lubricating oil composition may include a base oil (A) including an ester-based synthetic oil (A1), the content of the ester-based synthetic oil (A1) is 30% by mass to 100% by mass based on the total amount of the base oil (A), the ester-based synthetic oil (A1) is one or more of an ester (A1-1) of a monohydric alcohol and a monobasic acid and an ester (A1-2) of a monohydric alcohol and a polybasic acid, and the base oil (A) satisfies requirements (1) to (3): Requirement (1): the kinematic viscosity at 40° C. is 2.00 mm2/s to 4.00 mm2/s. Requirement (2): the specific heat at 20° C. is 1.75 kJ/(kg·K) or less. Requirement (3): the density at 20° C. is 0.850 g/cm3 or more.
    Type: Application
    Filed: July 21, 2021
    Publication date: August 24, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Shota KATO, Keiichi NARITA, Hiroaki KOSHIMA, Kenichi OGATA
  • Publication number: 20230039111
    Abstract: A lubricating oil composition which contains a base oil and a fluorine compound and may have improved cooling performance. The base oil may contain a mineral oil. The base oil may have a kinematic viscosity in a range of from 1 to 25 mm2/s at 40° C. The content of the fluorine compound may be in a range of from 3 to 30% by weight based on the total amount of the composition.
    Type: Application
    Filed: January 15, 2021
    Publication date: February 9, 2023
    Applicant: Idemitsu Kosan Co.,Ltd.
    Inventors: Yasuhito NAKAHARA, Hiroyuki TATSUMI, Keiichi NARITA, Koki ITO
  • Publication number: 20230032414
    Abstract: The present invention provides an exhaust gas purification catalyst in which platinum group metal migration from a catalyst layer to a base material during high temperature duration is suppressed. The exhaust gas purification catalyst disclosed herein includes a base material, a catalyst layer, and an intermediate layer arranged between the base material and the catalyst layer. The base material contains SiC. The catalyst layer contains a platinum group metal as a catalyst component. The intermediate layer contains substantially no platinum group metal. A product of a thickness of the intermediate layer (?m) and a specific surface area (m2/g) of the intermediate layer is 1100 or more.
    Type: Application
    Filed: December 2, 2020
    Publication date: February 2, 2023
    Inventors: Kohei Takasaki, Tatsuya Ohashi, Keiichi Narita
  • Publication number: 20220250038
    Abstract: The present invention provides a chemically stable catalyst for methane removal that exhibits excellent methane removal performance. The catalyst material for methane removal 30 of the invention includes a carrier 32 made of alumina and a catalyst 34 made of at least one of palladium and palladium oxide and carried directly on the carrier 32. With an exhaust gas purification catalyst test piece using this catalyst material for methane removal 30, a 50% methane removal temperature, which is an environmental temperature at which a methane removal rate reaches 50%, is not more than 347° C., based on the methane removal rate at 25° C. Furthermore, a specific surface area of the carrier 32 is preferably not more than 80 m2/g.
    Type: Application
    Filed: June 18, 2020
    Publication date: August 11, 2022
    Inventors: Naoto Fujita, Keiichi Narita, Hiroto Imai
  • Publication number: 20220176351
    Abstract: The present invention provides an exhaust gas purification catalyst having an excellent purification performance for purifying chemically stable methane. A catalyst material 30 includes a carrier 32 formed of alumina and a catalyst 34 formed of at least one of palladium and a palladium oxide directly supported on the carrier 32. A specific surface area of the carrier 32 is preferably 20 m2/g or more 90 m2/g or less. In one preferred aspect, a proportion of Pd(100) and PdO(101) in crystal planes of the catalyst 34 at a joint surface between the catalyst 34 and the carrier 32 is 20 number % or more.
    Type: Application
    Filed: March 27, 2020
    Publication date: June 9, 2022
    Inventors: Naoto Fujita, Mai Huong Tran, Keiichi Narita, Norihiko Aono, Atsushi Satsuma
  • 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: 20210371766
    Abstract: A lubricating oil composition containing a lubricating base oil (A), a neutral phosphorus-based compound (B), an acidic phosphorus-based compound (C), a sulfur-based compound (D) and an organic molybdenum compound (E).
    Type: Application
    Filed: October 16, 2019
    Publication date: December 2, 2021
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventor: Keiichi NARITA
  • Patent number: 11162049
    Abstract: Provided is a lubricant composition comprising a lubricant base oil (A), a neutral phosphorus compound (B), an acidic phosphorus compound (C), a sulfur compound (D), and a secondary amine compound (E), and having a flash point of 172° C. or higher.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: November 2, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventor: Keiichi Narita
  • Patent number: 11084022
    Abstract: A Pd-supporting Zr-based composite oxide wherein by having a Zr-containing composite oxide support and Pd supported thereon and by showing, upon XAFS (X-ray absorption fine structure) analysis, a maximum peak in a Pd bond distance range of 2.500-3.500 ?, the maximum peak being located in a position of 3.050-3.110 ?.
    Type: Grant
    Filed: December 26, 2016
    Date of Patent: August 10, 2021
    Assignees: CATALER CORPORATION, SANTOKU CORPORATION
    Inventors: Kyosuke Murakami, Keiichi Narita, Satoshi Matsueda, Michio Tanaka, Tadatoshi Murota, Shigeru Ono, Tomonori Tahara
  • Patent number: 11072759
    Abstract: Provided are: a lubricating oil composition containing a mineral oil (A) having a kinematic viscosity at 40° C. of 5 to 15 mm2/s and a flash point of 180° C. or higher, a synthetic oil (B) having a kinematic viscosity at 40° C. of 5 to 15 mm2/s and a flash point of 190° C. or higher, an amide compound (C) and a polyol ester compound (D), which has a low viscosity and fuel saving performance, which can be used in high-temperature environments, and which has excellent gear anti-seizing property and anti-shudder performance; and a lubrication method and a transmission using the lubricating oil composition.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: July 27, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventor: Keiichi Narita
  • Patent number: 10920162
    Abstract: Provided are a lubricating oil composition containing a component (A): a succinimide having an alkenyl group or an alkyl group, a component (B): a primary amine having a hydrocarbon group having 12 or more and 24 or less carbon atoms, a component (C): a fatty acid amide compound, and a component (D): an amide compound having a specific structure, and capable of satisfying both a high clutch capacity and a long anti-shudder lifetime; and a lubrication method and a transmission using the composition.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: February 16, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventor: Keiichi Narita
  • 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
  • Publication number: 20200172825
    Abstract: Provided is a lubricant composition comprising a lubricant base oil (A), a neutral phosphorus compound (B), an acidic phosphorus compound (C), a sulfur compound (D), and a secondary amine compound (E), and having a flash point of 172° C. or higher.
    Type: Application
    Filed: January 9, 2019
    Publication date: June 4, 2020
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventor: Keiichi NARITA
  • 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: 20190336945
    Abstract: A Pd-supporting Zr-based composite oxide wherein by having a Zr-containing composite oxide support and Pd supported thereon and by showing, upon XAFS (X-ray absorption fine structure) analysis, a maximum peak in a Pd bond distance range of 2.500-3.500 ?, the maximum peak being located in a position of 3.050-3.110 ?.
    Type: Application
    Filed: December 26, 2016
    Publication date: November 7, 2019
    Applicants: CATALER CORPORATION, SANTOKU CORPORATION
    Inventors: Kyosuke MURAKAMI, Keiichi NARITA, Satoshi MATSUEDA, Michio TANAKA, Tadatoshi MUROTA, Shigeru ONO, Tomonori TAHARA
  • 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