Patents by Inventor Keigo AIHARA

Keigo AIHARA 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).

  • Oxygen storage and release material, catalyst, exhaust gas purification system, and exhaust gas treatment method
    Patent number: 11559788
    Abstract: The problem to be solved by the present invention is to provide an oxygen storage and release material comprising a ceria-zirconia-based complex oxide improved in ability to remove HC and NOx and a three-way catalyst able to reduce an amount of NOx emission. Further, to solve this problem, an oxygen storage and release material comprising a ceria-zirconia-based complex oxide containing Gd2O3 in 0.1 mol % or more and less than 20 mol % and having an ion conductivity of 2×10?5 S/cm or more at 400° C. is provided. Further, in addition to the above, an oxygen storage and release material having a molar ratio of cerium and zirconium of 0.2 or more and 0.6 or less by cerium/(cerium+zirconium) and an speed of oxygen storage and release “?t50” of 20.0 seconds or more or amount of oxygen storage and release of 300 ?mol-O2/g or more etc. was obtained.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: January 24, 2023
    Assignees: NIPPON DENKO CO., LTD., JOHNSON MATTHEY PUBLIC LIMITED COMPANY
    Inventors: Keigo Aihara, Tomoharu Itoh, Hirofumi Konno, Shuhei Nagaoka, Takashi Yamada
  • OXYGEN STORAGE AND RELEASE MATERIAL, CATALYST, EXHAUST GAS PURIFICATION SYSTEM, AND EXHAUST GAS TREATMENT METHOD
    Publication number: 20210355851
    Abstract: The problem to be solved by the present invention is to provide an oxygen storage and release material comprising a ceria-zirconia-based complex oxide improved in ability to remove HC and NOx and a three-way catalyst able to reduce an amount of NOx emission. Further, to solve this problem, an oxygen storage and release material comprising a ceria-zirconia-based complex oxide containing Gd2O3 in 0.1 mol % or more and less than 20 mol % and having an ion conductivity of 2×10?5 S/cm or more at 400° C. is provided. Further, in addition to the above, an oxygen storage and release material having a molar ratio of cerium and zirconium of 0.2 or more and 0.6 or less by cerium/(cerium+zirconium) and an speed of oxygen storage and release “?t50” of 20.0 seconds or more or amount of oxygen storage and release of 300 ?mol-O2/g or more etc. was obtained.
    Type: Application
    Filed: November 6, 2018
    Publication date: November 18, 2021
    Applicants: NIPPON DENKO CO., LTD., JOHNSON MATTHEY PUBLIC LIMITED COMPANY
    Inventors: Keigo AIHARA, Tomoharu ITOH, Hirofumi KONNO, Shuhei NAGAOKA, Takashi YAMADA