0992276-A1 is referenced by 14 patents and cites 7 patents.

An exhaust gas purifying catalyst includes at least an under catalytic layer disposed on a substrate containing a NOx absorbent which absorbs NOx in exhaust gas under existence of oxygen, releases absorbed NOx when an oxygen concentration of exhaust gas lowers and is restrained from absorbing NOx by sulfur compounds in exhaust gas and an outer oxide layer disposed over the under catalytic layer and containing a Ce-Zr composite oxide.

Title
Exhaust gas purifying catalyst
Application Number
EP19990119026 19990929
Publication Number
0992276 (A1)
Application Date
September 29, 1999
Publication Date
April 12, 2000
Inventor
Kyogoku Makoto
JP
Sumida Hirosuke
JP
Koda Yuki
JP
Assignee
Mazda Motor
JP
IPC
F01N 03/10
B01J 37/02
B01J 23/63
B01D 53/94
F01N 03/08
B01J 37/00
B01J 33/00
B01J 23/54
B01J 23/10
B01J 21/00
B01D 53/94
F01N 03/08
B01J 37/025
B01J 37/02
B01J 33/00
B01J 23/66
B01J 23/63
B01J 23/58
B01J 23/10
B01J 21/16
B01D 53/94
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