The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2004
Filed:
Oct. 25, 2002
Applicant:
Inventors:
Tetsuya Watanabe, Tokyo, JP;
Osamu Nakayama, Tokyo, JP;
Keisuke Tashiro, Tokyo, JP;
Kinichi Iwachido, Tokyo, JP;
Hiroshi Tanada, Tokyo, JP;
Assignee:
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 2/906 ;
U.S. Cl.
CPC ...
B01J 2/906 ;
Abstract
An exhaust gas clean-up catalyst having a catalytic layer which contains, as an occluding agent, at least one (potassium and/or the like) chosen from a group consisting of alkaline metals and alkaline earth metals. The catalytic layer consists of a first catalytic layer ( ) which contains the occluding agent (potassium and/or the like) and an acid material ( ) having a high affinity to the occluding agent, and a second catalytic layer ( ) which contains the occluding agent and does not contain the acid material.