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:
Feb. 09, 1993
Filed:
May. 15, 1991
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ;
U.S. Cl.
CPC ...
502304 ; 502303 ; 502324 ; 502327 ; 502333 ; 502336 ; 502338 ; 502339 ; 502525 ; 4232132 ; 4232135 ;
Abstract
For the preparation of a catalytic composite for purifying exhaust gases, first, at least one perov-skite-type compound oxide of the formula RMO.sub.3, where R is La or a combination of La and Ce, and M is Co, Mn or a combination thereof, is supported together with cerium dioxide and alumina sol on a heat resistant carrier made of an inorganic oxide selected from the group consisting of cordierite and mullite, and then iron and palladium are further supported together thereon. As a result, a catalytic composite having a high degree of oxidation activity at low temperatures and also having excellent heat resistance can be obtained.