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:
Jan. 09, 2001
Filed:
Jun. 22, 1999
Applicant:
Inventor:
Shigeru Aozasa, Amagasaki, JP;
Assignee:
Anan Kasei Co., Ltd., Hyogo-Ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01F 1/700 ; C01G 2/502 ; B01J 2/300 ; B01J 2/310 ;
U.S. Cl.
CPC ...
C01F 1/700 ; C01G 2/502 ; B01J 2/300 ; B01J 2/310 ;
Abstract
A zirconium—cerium composite oxide having excellent heat resistance and being capable of maintaining its large specific surface area even when used under high-temperature conditions, which composite oxide contains zirconium and cerium at a weight ratio of 51 to 95:49 to 5 in terms of zircomium oxide and ceric oxide, the composite oxide having a specific surface area of not smaller than 50 m,/g, wherein said composite oxide is capable of maintaining a specific surface area of not smaller than 20 m,/g even after heating at 1100° C. for 6 hours, a method for preparing the same, and a co-catalyst for purifying exhaust gas prepared with the composite oxide.