Patents by Inventor Eiichi Shiraiashi

Eiichi Shiraiashi 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 purifying catalyst suppressing the generation of hydrogen sulfide and method of making the catalyst
    Patent number: 5286699
    Abstract: An exhaust gas purifying catalyst suppressing the generation of hydrogen sulfide obtained by coating and supporting on a honeycomb carrier of a monolithic structure a catalyst composition containing (a) activated alumina supporting platinum and/or palladium in the range of 5 to 30 weight % and rhodium in the range of 1 to 20 weight %, (b) a cerium oxide and (c) activated alumina, and optionally (d) an alkali metal and/or (e) a nickel oxide.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: February 15, 1994
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Tomohisa Ohata, Kazuo Tsuchitani, Eiichi Shiraiashi