Patents by Inventor Shoko Yatagai

Shoko Yatagai 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 purifying exhaust gas and method of manufacturing the same
    Patent number: 5019546
    Abstract: A catalyst for purifying exhaust gas, comprising a catalyst carrier, a first coating layer formed on a surface of the catalyst carrier and mainly consisting of active alumina oxide containing platinum and rhodium and a second coating layer formed on a surface of the first coating layer and mainly consisting of palladium and composite powder including zirconium oxide and lanthanum oxide fixed on a surface of cerium oxide, and a method of manufacturing the catalyst.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: May 28, 1991
    Assignee: Mazda Motor Corporation
    Inventors: Hiroshi Murakami, Masayuki Koishi, Shoko Yatagai, Kazuko Yamagata
  • Catalyst and method of making the catalyst
    Patent number: 4888320
    Abstract: A method of making a catalyst for cleaning exhaust gas from an engine including steps of preparing corrugated metallic panels and plane metallic panels, laminating the plane metallic panels with the corrugated metallic panels alternatively side by side to form a honeycomb structure of a metallic carrier, forming at least two layers of a base coat portion and an over coat portion of alumina based coating on the metallic carrier sequentially, and impregnating catalytic components into at least the outermost layer of the alumina based coating.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: December 19, 1989
    Assignee: Mazda Motor Corporation
    Inventors: Kazunori Ihara, Hiromi Ohishi, Shoko Yatagai