Patents by Inventor Shuya OMATA

Shuya OMATA 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).

  • LNT layered catalyst for lean burn gasoline engine and exhaust gas purification apparatus using the same
    Patent number: 11686231
    Abstract: Provided are an LNT layered catalyst for a lean burn gasoline engine having an enhanced NOx storage rate and capable of developing a higher NOx purification rate, and an exhaust gas purification apparatus using the same, the LNT layered catalyst including a substrate, a first catalyst layer including ceria-alumina particles carrying Pt, Pd, and BaO, and a second catalyst layer including ceria-alumina particles carrying Pt and Rh, in which a content of Pt in the first catalyst layer is 0.45 to 0.85 mass %; among Pt included in the first catalyst layer, a content proportion in a first depth region is 88 to 90 mass %, and a content proportion in a second depth region is 10 to 12 mass %; a content of Ba in the first catalyst layer is 4 to 11 mass %; and the second catalyst layer is substantially free from Ba.
    Type: Grant
    Filed: February 17, 2021
    Date of Patent: June 27, 2023
    Assignees: N.E. CHEMCAT Corporation, SUBARU CORPORATION
    Inventors: Yasuyoshi Sasaki, Isao Tan, Shunsuke Fukutomi, Takehiro Fujimura, Shuya Omata
  • LNT LAYERED CATALYST FOR LEAN BURN GASOLINE ENGINE AND EXHAUST GAS PURIFICATION APPARATUS USING THE SAME
    Publication number: 20210270165
    Abstract: Provided are an LNT layered catalyst for a lean burn gasoline engine having an enhanced NOx storage rate and capable of developing a higher NOx purification rate, and an exhaust gas purification apparatus using the same, the LNT layered catalyst including a substrate, a first catalyst layer including ceria-alumina particles carrying Pt, Pd, and BaO, and a second catalyst layer including ceria-alumina particles carrying Pt and Rh, in which a content of Pt in the first catalyst layer is 0.45 to 0.85 mass %; among Pt included in the first catalyst layer, a content proportion in a first depth region is 88 to 90 mass %, and a content proportion in a second depth region is 10 to 12 mass %; a content of Ba in the first catalyst layer is 4 to 11 mass %; and the second catalyst layer is substantially free from Ba.
    Type: Application
    Filed: February 17, 2021
    Publication date: September 2, 2021
    Applicants: N.E. CHEMCAT Corporation, SUBARU CORPORATION
    Inventors: Yasuyoshi SASAKI, Isao TAN, Shunsuke FUKUTOMI, Takehiro FUJIMURA, Shuya OMATA