Patents by Inventor Hirosuki SUMIDA

Hirosuki SUMIDA 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).

  • Publication number: 20090084266
    Abstract: Disclosed is a particulate filter, which is adapted to be disposed in an exhaust passage of an engine to trap particulate matter contained in exhaust gas discharged from the engine. The particulate filter comprises a filter body having a porous partition wall which defines a plurality of exhaust gas channels allowing the exhaust gas to pass therethrough, and a catalyst layer formed on a surface of the porous partition wall. The catalyst layer includes a Zr-based composite oxide which contains zirconium (Zr), and a rare-earth metal except cerium, wherein a content ratio of an oxide of the non-cerium rare-earth metal to a total amount of ZrO2 and the oxide of the non-cerium rare-earth metal in the Zr-based composite oxide is set in the range of greater than 33 mol % to less than 40 mol %. The particulate filter of the present invention can achieve a higher PM burning rate to burn PM within a shorter period of time.
    Type: Application
    Filed: October 1, 2008
    Publication date: April 2, 2009
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Hiroshi YAMADA, Kenji SUZUKI, Koichiro HARADA, Kenji OKAMOTO, Akihide TAKAMI, Susumu MINEOI, Hirosuki SUMIDA