Patents by Inventor Katsumi Kamiyama

Katsumi Kamiyama 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).

  • Process for reducing nitrogen oxides from exhaust gas
    Patent number: 5270024
    Abstract: A catalyst for reducing nitrogen oxides from an exhaust gas containing the same in an oxygen rich atmosphere comprising (i) a zeolite having a molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 of at least 10, (ii) copper, and (iii) a rare earth ion, an alkaline earth metal and/or a valence variable metal.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: December 14, 1993
    Assignees: Tosoh Corporation, Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha
    Inventors: Senshi Kasahara, Katsumi Kamiyama, Kazushige Igawa, Shinichi Matsumoto, Masayuki Fukui, Tadashi Suzuki, Shiroh Kondoh, Koji Yokota, Shinichi Takeshima, Kazunobu Ishibashi, Masao Nakano
  • Copper-containing zeolites and their preparation
    Patent number: 5110777
    Abstract: The present invention relates to the production of catalysts and adsorbents which can be used for the removal of nitrogen oxides from exhaust gases containing the same.
    Type: Grant
    Filed: June 14, 1990
    Date of Patent: May 5, 1992
    Assignee: Tosoh Corporation
    Inventors: Katsumi Kamiyama, Kazushige Igawa
  • Removal of nitric oxides by copper-containing zeolites
    Patent number: 4999173
    Abstract: Copper-containing zeolites are prepared by subjecting a zeolite having the lattice spacings (d value) indicated in Table 1 as estimated by powder X-ray diffraction to ion exchange with copper ions in an aqueous solution containing a water soluble copper salt and ammonia. Nitrogen oxides can be decomposed with the copper-containing zeolite catalyst.
    Type: Grant
    Filed: October 7, 1988
    Date of Patent: March 12, 1991
    Assignee: Tosoh Corporation
    Inventors: Katsumi Kamiyama, Kazushige Igawa