Patents by Inventor Tadashi Tokuyama

Tadashi Tokuyama 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
    Patent number: 7235511
    Abstract: An exhaust gas purifying catalyst includes a carrier and a catalyst layer provided on the carrier. The catalyst layer includes active Al2O3 on which a noble metal is carried, an oxygen storage agent on which Rh is carried, Al2O3 coated with ZrO2 on which Rh is carried, and a binder material.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: June 26, 2007
    Assignees: Tokyo Roki Co., Ltd., Mazda Motor Corporation
    Inventors: Tomohiko Kawamoto, Katsuyuki Fujita, Tadashi Tokuyama, Masahiko Shigetsu, Masaaki Akamine, Hisaya Kawabata, Hideharu Iwakuni, Akihide Takami
  • Exhaust gas purification catalyst
    Publication number: 20060217263
    Abstract: In an exhaust gas purification catalyst in which a catalytic coating containing plural kinds of aluminas and plural kinds of oxygen storage components each carrying a catalytic precious metal is coated on a honeycomb support, the catalytic coating is formed of an upper layer and a lower layer, palladium is carried on a first alumina and a Ce—Zr—La—Y-alumina compound having oxygen storage capacity in the lower layer, platinum is carried on a second alumina in the upper layer, and rhodium is carried on a third alumina and a Ce—Zr—Nd mixed oxide having oxygen storage capacity in the upper layer.
    Type: Application
    Filed: March 9, 2006
    Publication date: September 28, 2006
    Applicants: TOKYO ROKI CO., LTD, MAZDA MOTOR CORPORATION
    Inventors: Tomohiko Kawamoto, Katsuyuki Fujita, Tadashi Tokuyama, Hisaya Kawabata, Masahiko Shigetsu, Masaaki Akamine, Akihide Takami
  • Exhaust gas purifying catalyst
    Publication number: 20050070428
    Abstract: An exhaust gas purifying catalyst includes a carrier and a catalyst layer provided on the carrier. The catalyst layer includes active Al2O3 on which a noble metal is carried, an oxygen storage agent on which Rh is carried, Al2O3 coated with ZrO2 on which Rh is carried, and a binder material.
    Type: Application
    Filed: September 3, 2004
    Publication date: March 31, 2005
    Applicant: Mazda Motor Corporation
    Inventors: Tomohiko Kawamoto, Katsuyuki Fujita, Tadashi Tokuyama, Masahiko Shigetsu, Masaaki Akamine, Hisaya Kawabata, Hideharu Iwakuni, Akihide Takami
  • Material for exhaust gas purifying catalyst, exhaust gas purifying catalyst made of the material and method for producing the exhaust gas purifying catalyst
    Patent number: 6180558
    Abstract: A catalytic base material for an exhaust gas purifying catalyst is produced by impregnating ceria powders with a barium contained solution and heating the ceria particles at approximately 400 to 1100° C. to create and accumulate barium oxides fixed to surfaces of the ceria particles.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: January 30, 2001
    Assignees: Mazda Motor Corporation, Tokyo Roki Co., Ltd.
    Inventors: Takahiro Kurokawa, Akihide Takami, Hideharu Iwakuni, Makoto Kyogoku, Shinichi Tanioka, Kenichi Yamamoto, Yoko Kawakami, Hiroshi Murakami, Hirosou Oda, Tadashi Tokuyama
  • Color image processing method and apparatus
    Patent number: 5414537
    Abstract: A color image of an object is processed so that the processed image accurately portrays the colors of the object regardless of varying exposure conditions. An object and a color chart that is comprised of a plurality of color chips having known colorimetric parameters are imaged under the same predetermined exposure conditions. Then, colorimetric parameters are determined for each imaged color chip of the imaged color chart. A correlation, between the known and the determined colorimetric parameters, is computed and, on the basis of the computed correlation, the color of the imaged object is corrected.
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: May 9, 1995
    Assignee: Sony Corporation
    Inventors: Hideaki Omuro, Kohei Sakura, Hidehiko Okada, Tadashi Tokuyama, Akira Oryo