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:
Dec. 15, 1998
Filed:
Feb. 26, 1996
Takashi Takemoto, Higashihiroshima, JP;
Kazunari Komatsu, Mihara, JP;
Taeko Shimizu, Hiroshima, JP;
Hiroshi Yamada, Hatsukaichi, JP;
Hiroshi Murakami, Hiroshima, JP;
Masayuki Koishi, Kure, JP;
Yuki Koda, Hiroshima, JP;
Keiko Matsui, Aki-gun, JP;
Mazda Motor Corporation, Hiroshima-ken, JP;
Abstract
A catalyst (3) for purifying an automotive exhaust gas, in which inner and outer catalytic layers (5,6), each of which has a base material and a catalytic material held by the base material, are stratified on a honeycomb-type carrier (4). In the catalyst (3), the inner catalytic layer (5) contains a palladium component as the catalytic component. Further the inner catalytic layer (5) contains a nickel oxide component for preventing poisoning of the palladium component. On the other hand, though the outer catalytic layer (6) contains a rhodium component as the catalytic component, it does not contain a palladium component nor a nickel oxide component.