Patents by Inventor Yoshiyasu Andoh

Yoshiyasu Andoh 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).

  • Hexagonal-cell honeycomb catalyzer for purifying exhaust gas
    Patent number: 7988921
    Abstract: A hexagonal-cell honeycomb catalyzer is for purifying an exhaust gas. The catalyzer comprising a support that has a plurality of cells and a purification layer that has an HC absorption layer and a three-way catalyst layer. The HC absorption layer is formed on the honeycomb-formed surface of each wall of the support. The three-way catalyst layer is formed on the surface of the HC absorption layer. Provided that the HC absorption layer has a thickness a1 and the three-way catalyst layer has a thickness b1 at a thin portion of the purification layer of which thickness is minimum and the HC absorption layer has a thickness a2 and the three-way catalyst layer has a thickness b2 at a thick portion of the purification layer of which thickness is maximum, a ratio of a1/b1 and a ratio of a2/b2 are both within a range of 1/20 to 5/1.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: August 2, 2011
    Assignees: Denso Corporation, Cataler Corporation
    Inventors: Masakazu Murata, Yoshiyasu Andoh, Shingo Nakata, Tomoaki Nakano, Akimasa Hirai, Kenichi Taki, Yuji Yabuzaki
  • HEXAGONAL-CELL HONEYCOMB CATALYZER FOR PURIFYING EXHAUST GAS
    Publication number: 20090010815
    Abstract: A hexagonal-cell honeycomb catalyzer is for purifying an exhaust gas. The catalyzer comprising a support that has a plurality of cells and a purification layer that has an HC absorption layer and a three-way catalyst layer. The HC absorption layer is formed on the honeycomb-formed surface of each wall of the support. The three-way catalyst layer is formed on the surface of the HC absorption layer. Provided that the HC absorption layer has a thickness a1 and the three-way catalyst layer has a thickness b1 at a thin portion of the purification layer of which thickness is minimum and the HC absorption layer has a thickness a2 and the three-way catalyst layer has a thickness b2 at a thick portion of the purification layer of which thickness is maximum, a ratio of a1/b1 and a ratio of a2/b2 are both within a range of 1/20 to 5/1.
    Type: Application
    Filed: July 7, 2008
    Publication date: January 8, 2009
    Applicants: DENSO CORPORATION, CATALER CORPORATION
    Inventors: Masakazu Murata, Yoshiyasu Andoh, Shingo Nakata, Tomoaki Nakano, Akimasa Hirai, Kenichi Taki, Yuji Yabuzaki