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. 07, 2013
Filed:
Jul. 06, 2009
Kazuya Kinoshita, Saitama, JP;
Yuichi Senoo, Saitama, JP;
Yousuke Shibata, Saitama, JP;
Isamu Yashima, Saitama, JP;
Kazuya Kinoshita, Saitama, JP;
Yuichi Senoo, Saitama, JP;
Yousuke Shibata, Saitama, JP;
Isamu Yashima, Saitama, JP;
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Abstract
A deoxidizer includes a porous body of fluorite-type cerium oxide represented by CeO(where x is a positive number smaller than 2) and having a reversible oxygen deficiency. The deoxidizer has a specific surface area of 0.6 to 1.8 m/g and a pore median diameter of 1.6 to 5.3 μm. The cerium oxide used for the deoxidizer is produced by: firing a cerium-containing salt in the atmosphere at 500° C. to 1400° C. for 1 to 20 hours, to produce fluorite-type cerium oxide composed of a porous body; and firing the cerium oxide at 700° C. to 1100° C. for 1 to 3 hours in a reducing atmosphere having a hydrogen concentration equal to or above the lower explosive limit, to remove oxygen from the cerium oxide and produce the fluorite-type cerium oxide represented by CeOand having a reversible oxygen deficiency.