Patents by Inventor Takashige Ishida

Takashige Ishida 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).

  • Sintered metal filters
    Patent number: 5993502
    Abstract: A sintered porous metal filter permitting passage of gases therethrough comprises a filter portion having specified pores for trapping dust as separated from the gas to be treated, and a support portion for supporting the filter portion, the support portion having pores greater than the pores of the filter portion to diminish the pressure loss of the gas to be treated, the filter portion comprising metal particles of small diameter, the support portion comprising metal particles having a greater diameter than the filter portion forming metal particles, the filter portion and the support portion being formed to provide an outer side and an inner side integral therewith by sintering the two kinds of metal particles by hot isostatic pressing. A catalyst reaction portion for rendering noxious components of the gas to be treated harmless is formed in the filter portion or the support portion, or as an independent catalyst layer.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: November 30, 1999
    Assignee: Kubota Corporation
    Inventors: Ryutaro Motoki, Takashige Ishida, Shigeru Tanaka, Jun Funakoshi, Takashi Nishi, Akira Kosaka, Tetsuo Kimura
  • Sintered metal filters
    Patent number: 5925156
    Abstract: A sintered porous metal filter permitting passage of gases therethrough includes a filter portion having specified pores for trapping and separatin dust from the gas to be treated, and a support portion for supporting the filter portion. The support portion has pores greater than the pores of the filter portion to diminish the pressure loss of the gas to be treated. The filter portion includes metal particles of small diameter, and the support portion includes metal particles having a greater diameter than the filter portion forming metal particles. The filter portion and the support portion are formed by sintering the two kinds of metal particles by hot isostatic pressing to provide an outer side and an inner side integrally. A catalyst reaction portion is formed in the filter portion or the support portion, or as an independent catalyst layer to make noxious components of the gas harmless.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: July 20, 1999
    Assignee: Kubota Corporation
    Inventors: Ryutaro Motoki, Takashige Ishida, Shigeru Tanaka, Jun Funakoshi, Takashi Nishi, Akira Kosaka