Patents by Inventor Hyogoro Aoyama

Hyogoro Aoyama 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).

  • Method of cleaning an exhaust gas containing nitrogen oxides and fine carbon-containing particulates
    Patent number: 5154901
    Abstract: An exhaust gas cleaner comprising a catalyst carried on a heat-resistant ter, the catalyst comprising (a) one or more alkali metals, (b) one or more metals selected from the group consisting of Zn, Sn and transition metals excluding platinum-group metals, and (c) one or more rare earth metals, and a method of cleaning an exhaust gas with it. Alkali metals may be added to a fuel.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: October 13, 1992
    Assignees: Kabushiki Kaisha Riken, Kozo Izuka Director-General of Agency of Industrial Science & Technology
    Inventors: Kiyohide Yoshida, Satoshi Sumiya, Takashi Ibusuki, Akira Obuchi, Hyogoro Aoyama, Akihiko Ohi, Hideo Ohuchi
  • Exhaust gas cleaner
    Patent number: 5141714
    Abstract: An exhaust gas cleaner comprising (a) at least one filter made of a heat-resistant and electrically insulating material for trapping floating fine particles in an exhaust gas; and (b) at least a pair of electrodes stacked with the filter alternately, voltage being applied between the adjacent electrodes to burn electrically conductive and burnable fine particles trapped in the filter by heat generated by a current flowing between the adjacent electrodes, and the direction of the flow of the exhaust gas in the filter being essentially parallel to that of the laminate surface of the electrodes. The filter may carry a catalyst which functions to reduce harmful gas components in the exhaust gas.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: August 25, 1992
    Assignee: Kabushiki Kaisha Riken
    Inventors: Akira Obuchi, Hidenori Yoshiyama, Akihiko Ohi, Hyogoro Aoyama, Hideo Ohuchi, Atsushi Ogata, Koichi Mizuno, Seiji Makino, Kiyohide Yoshida, Gyo Muramatsu, Nobuyuki Matsumura, Satoshi Sumiya, Yoshikazu Takahashi
  • Catalyst for cleaning exhaust gas
    Patent number: 5108977
    Abstract: An exhaust gas cleaner comprising a catalyst carrier on a heat-resistant filter, the catalyst comprising (a) one or more alkali metals, (b) one or more metals selected from the group consisting of Zn, Sn and transition metals excluding platinum-group metals, and (c) one or more rare earth metals, and a method of cleaning an exhaust gas with it. Alkali metals may be added to a fuel.
    Type: Grant
    Filed: December 30, 1988
    Date of Patent: April 28, 1992
    Assignees: Kabushiki Kaisha Riken, Kozo Izuka, Director-General of Agency of Industrial Science and Technology
    Inventors: Kiyohide Yoshida, Satoshi Sumiya, Takashi Ibusuki, Akira Obuchi, Hyogoro Aoyama, Akiniko Ohi, Hideo Ohuchi