Patents by Inventor Shigeru Kumai

Shigeru Kumai 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).

  • Diesel exhaust gas purifying filter
    Patent number: 7384612
    Abstract: An exhaust cleanup filter which, even if the exhaust temperature is low as during vehicular driving under low load, can trap PM efficiently to prevent clogging by PM buildup and which also is effective in purifying the exhaust from a diesel engine that does not use any burner or heater to remove PM. The cleanup filter is for purifying the exhaust from diesel engines and comprises particulate ceramic porous bodies that have a three-dimensional network structure, as well as artificial pores and communication channels in the interior, with some of the pores being partially exposed on the surfaces of the porous bodies.
    Type: Grant
    Filed: February 17, 2003
    Date of Patent: June 10, 2008
    Assignees: Kabushiki Kaisha Chemical Auto
    Inventors: Yasuo Ajisaka, Shigeru Kumai, Yoshitaka Kumai
  • Diesel exhaust gas purifying filter
    Publication number: 20050147541
    Abstract: An exhaust cleanup filter which, even if the exhaust temperature is low as during vehicular driving under low load, can trap PM efficiently to prevent clogging by PM buildup and which also is effective in purifying the exhaust from a diesel engine that does not use any burner or heater to remove PM. The cleanup filter is for purifying the exhaust from diesel engines and comprises particulate ceramic porous bodies that have a three-dimensional network structure, as well as artificial pores and communication channels in the interior, with some of the pores being partially exposed on the surfaces of the porous bodies.
    Type: Application
    Filed: February 17, 2003
    Publication date: July 7, 2005
    Inventors: Yasuo Ajisaka, Shigeru Kumai, Yoshitaka Kumai