Patents by Inventor So Takeoka

So Takeoka 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 cleaning catalysts and method of producing same
    Patent number: 3939097
    Abstract: Exhaust gas cleaning catalysts are produced by alloying copper and aluminum with at least one of the elements, nickel and chromium, and eluting by alkali or acid means aluminum from the cooled alloy surface. Small amounts of other metals from the fourth or fifth period V.about. VIII groups, may be added to the catalysts by alloying, or by impregnation, for enhanced catalytic properties. The catalysts exhibit improved reduction of NO and oxidation of CO in an exhaust gas stream, in the presence of Pb, SO.sub.2, moisture and hydrocarbons (H.C) and at relatively low temperatures.
    Type: Grant
    Filed: December 6, 1973
    Date of Patent: February 17, 1976
    Assignee: Hitachi Shipbuilding and Engineering Co., Ltd.
    Inventors: So Takeoka, Hideya Inaba, Masayoshi Ichiki