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. 18, 1990
Filed:
Mar. 15, 1989
Shinichi Matsumoto, Aichi, JP;
Toru Tanaka, Aichi, JP;
Yutaka Ishikawa, Shizuoka, JP;
Shinji Matsuura, Shizuoka, JP;
Hirofumi Shinjoh, Aichi, JP;
Masakuni Ozawa, Aichi, JP;
Toyota Jidosha Kabushiki Kaisha Cataler Industrial Co. Ltd, both of, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, both of, JP;
Abstract
A catalyst for purification of exhaust gases comprising: a support substrate; an active alumina coating layer comprising at least one of nickel oxide and cobalt oxide formed on the surface of the support substrate; a composite oxide comprising cerium oxide and zirconium oxide formed in the active alumina coating layer; and noble metal catalyst ingredients comprising at least one of platinum, palladium and rhodium loaded on the active alumina coating layer. The catalyst offers a decreased hydrogen sulfide H.sub.2 S emission and conversion ratios for hydrocarbon (HC), carbon monoxide (CO), and nitrogen oxides (NOx) equivalent to or superior to those of conventional catalysts.