Patents Examined by Kliey Stoner
  • Catalyst for exhaust gas purification
    Patent number: 6797663
    Abstract: An exhaust gas clean-up catalyst having a catalytic layer which contains, as an occluding agent, at least one (potassium and/or the like) chosen from a group consisting of alkaline metals and alkaline earth metals. The catalytic layer consists of a first catalytic layer (20) which contains the occluding agent (potassium and/or the like) and an acid material (30) having a high affinity to the occluding agent, and a second catalytic layer (40) which contains the occluding agent and does not contain the acid material.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: September 28, 2004
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tetsuya Watanabe, Osamu Nakayama, Keisuke Tashiro, Kinichi Iwachido, Hiroshi Tanada