Patents by Inventor Mitsutaka Okumura

Mitsutaka Okumura 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).

  • Material having ultrafine gold particles immobilized thereon and method for production thereof
    Patent number: 5789337
    Abstract: A material having ultrafine gold particles immobilized thereon consists essentially of at least one support selected from the group consisting of metal oxides, metal sulfides, and carbonaceous substances and ultrafine gold particles having a maximum particle diameter of 250 angstroms and deposited on the support with strong interaction. The material exhibits high activity as a catalyst for the oxidation of carbon monoxide to carbon dioxide. It is produced by causing a vaporized organic gold complex to contact at least one support selected from the group consisting of metal oxides, metal sulfides, and carbonaceous substances in an atmosphere of reduced pressure thereby inducing adsorption of the vapor of organic gold complex on the support and then heating the product of the adsorption to a temperature in the range of 100.degree.-700.degree. C.
    Type: Grant
    Filed: November 5, 1996
    Date of Patent: August 4, 1998
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventors: Masatake Haruta, Mitsutaka Okumura, Koji Tanaka, Atsushi Ueda, Susumu Tsubota, Tetsuhiko Kobayashi