Patents Assigned to Tokyo Denki Kagaku Kogyo Kabushiki Kaisha (Tokyo Electronics Co., Ltd.)
  • Catalyst for treating exhaust gas from engine vehicles
    Patent number: 3957691
    Abstract: A catalyst for treating exhaust gas from engine vehicles which comprises a intered substance composed of ferric oxide and at least one metallic oxide and forming at least in part a spinel crystal structure. This catalyst can be strengthened by adding aluminum oxide as an additional ingredient. Also, by adding metallic ruthenium to the catalyst, its rate of converting nitrogen compounds can be increased and by adding metallic platinum to the catalyst, its rate of converting carbon monoxide and hydrocarbons can be increased.
    Type: Grant
    Filed: July 5, 1973
    Date of Patent: May 18, 1976
    Assignee: Tokyo Denki Kagaku Kogyo Kabushiki Kaisha (Tokyo Electronics Co., Ltd.)
    Inventors: Shichiro Adachi, Toshinobu Miyakoshi