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:
Apr. 28, 1998
Filed:
Sep. 03, 1996
Gyo Muramatsu, Kumagaya, JP;
Kazuhiko Ogiwara, Kumagaya, JP;
Kiyohide Yoshida, Kumagaya, JP;
Akira Abe, Kumagaya, JP;
Naoko Irite, Kumagaya, JP;
Shoji Mochida, Kumagaya, JP;
Katsuji Onai, Kumagaya, JP;
Kabushiki Kaisha Riken, Tokyo, JP;
Abstract
Nitrogen oxides are removed from an exhaust gas containing nitrogen oxides and oxygen in an amount larger than its stoichiometric amount relative to unburned components in the exhaust gas, by using an exhaust gas cleaner having Ag supported by a porous inorganic oxide body and second catalyst containing second catalytically active components supported by a porous inorganic oxide body. The second catalytically active components consist essentially of Cu and/or other metals such as alkali metal elements, rare earth elements, etc.