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:
Oct. 17, 2000
Filed:
Nov. 06, 1996
Yukio Kinugasa, Susono, JP;
Kouhei Igarashi, Susono, JP;
Takaaki Itou, Mishima, JP;
Naoto Suzuki, Susono, JP;
Takehisa Yaegashi, Mishima, JP;
Takaaki Kanazawa, Toyota, JP;
Takahiro Hayashi, Toyota, JP;
Koji Yokota, Nagoya, JP;
Yasutaka Nagai, Aichi-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Nagakute-cho, JP;
Abstract
An exhaust gas purifying catalyst, for reducing nitrogen oxides and ammonia in an exhaust gas of an internal combustion engine, in an oxidizing atmosphere, is provided. The exhaust gas purifying catalyst comprises a first catalyst having zeolite carrying platinum and copper thereon. Preferably, the exhaust gas purifying catalyst further comprises a second catalyst having zeolite carrying copper thereon. Preferably, the second catalyst is arranged upstream of the first catalyst, with respect to the exhaust gas flow.