Patents by Inventor Yasunori Kurashima

Yasunori Kurashima 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).

  • Exhaust gas purification catalyst
    Patent number: 10753248
    Abstract: A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprises: a substrate; and a catalytic region on the substrate; wherein the catalytic region comprises a platinum group metal (PGM) component, an oxide, and a rare earth metal component; wherein the oxide is an inorganic oxide, an oxygen storage component (OSC) material, or a mixture thereof; wherein the rare earth metal component concentration by element on the surface of the oxide per unit specific surface area of the oxide is 1 ?mol/m2 to 20 ?mol/m2.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: August 25, 2020
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Tomotaka Hirota, Yasunori Kurashima, Shuhei Nagaoka, Yukie Ohtsuka, Satoshi Sumiya, Takayuki Suzuki, Takashi Yamada
  • EXHAUST GAS PURIFICATION CATALYST
    Publication number: 20190093531
    Abstract: A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprises: a substrate; and a catalytic region on the substrate; wherein the catalytic region comprises a platinum group metal (PGM) component, an oxide, and a rare earth metal component; wherein the oxide is an inorganic oxide, an oxygen storage component (OSC) material, or a mixture thereof; wherein the rare earth metal component concentration by element on the surface of the oxide per unit specific surface area of the oxide is 1 ?mol/m2 to 20 ?mol/m2.
    Type: Application
    Filed: September 25, 2018
    Publication date: March 28, 2019
    Inventors: Tomotaka HIROTA, Yasunori KURASHIMA, Shuhei NAGAOKA, Yukie OHTSUKA, Satoshi SUMIYA, Takayuki SUZUKI, Takashi YAMADA
  • Exhaust gas clean-up catalyst
    Patent number: 6645439
    Abstract: Exhaust gas clean-up catalysts that contain one or two or more noble metals chosen from the group platinum (Pt), rhodium (Rh), ruthenium (Ru), Iridium (Ir), osmium (Os) and other noble metals, and at least one of tungsten (W) metal or tungsten oxide and, optionally, at least one of niobium (Nb) metal, niobium oxide, molybdenum (Mo) metal, or molybdenum oxide, and which can also contain the metal oxide(s) ceria and/or zirconia if necessary, are especially useful for cleaning up hydrocarbons in exhaust gases.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: November 11, 2003
    Assignee: Johnson Matthey Japan Ltd.
    Inventors: Geng Zhang, Tomotaka Hirota, Yasunori Kurashima, Hideaki Muraki
  • EXAUST GAS CLEAN-UP CATALYST
    Publication number: 20030129099
    Abstract: Exhaust gas clean-up catalysts that contain one or two or more noble metals chosen from the group platinum (Pt), palladium (Pd), rhodium (Rh), ruthenium (Ru), Iridium (), osmium (Os) and other noble metals and one, two or more metal oxides chosen from the group tungsten (W), niobium b) and molybdenum (Mo) oxides, and which can also contain the metal oxide(s) ceria and/or zirconia if necessary, are especially useful for cleaning up hydrocarbons in exhaust gases.
    Type: Application
    Filed: May 25, 1999
    Publication date: July 10, 2003
    Inventors: GENG ZHANG, TOMOTAKA HIROTA, YASUNORI KURASHIMA, HIDEAKI MURAKI