Patents by Inventor Misao Kawai

Misao Kawai 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).

  • Catalyst for reducing nitrogen oxides
    Patent number: 4138368
    Abstract: A catalyst for reducing nitrogen oxides is prepared by shaping into granules a naturally produced inorganic powdery substance composed predominantly of .alpha.-Fe.sub.2 O.sub.3 alone or in mixture with one or more of metals selected from Groups I-b, V-a, VI-a,VII-a and VIII of the periodic Table or compounds thereof, and thereafter subjecting the granules to a heat treatment. This catalyst can be used for reductively eliminating dilute nitrogen oxides in exhaust gas by bringing the exhaust gas and a reducing agent into contact with the catalyst.
    Type: Grant
    Filed: June 6, 1977
    Date of Patent: February 6, 1979
    Assignee: Director General of Agency of Industrial Science and Technology
    Inventors: Makoto Kiyomiya, Misao Kawai