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:
May. 31, 1988
Filed:
Jun. 06, 1986
Applicant:
Inventors:
Kenji Tabata, Ikoma, JP;
Ikuo Matsumoto, Ikoma, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ;
U.S. Cl.
CPC ...
502304 ; 502302 ; 502525 ;
Abstract
An oxidation catalyst of the perovskite-type compound oxide which comprises, as A site, a mixture of rare earth elements from ores, part of which is replaced by at least one element selected from alkali metals, alkaline earth metals and rare earth elements other than the ore-originating elements, and a transition metal as B site. The surface atomic ratio of the mixed rare earth elements and the transition metal is in the range of 1.0:1.0 to 1.1.:1.0. A method for preparing the compound oxide is also described.