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:
Apr. 27, 2021
Filed:
Jan. 23, 2017
Nippon Denko Co., Ltd., Tokyo, JP;
Tomoharu Itoh, Anan, JP;
Yusuke Hidaka, Anan, JP;
Masasuke Yamaba, Anan, JP;
Kenji Okamoto, Anan, JP;
Hiroki Uede, Anan, JP;
NIPPON DENKO CO., LTD, Tokyo, JP;
Abstract
A ceria-zirconia-based composite oxide oxygen storage material with a fast oxygen storage rate having an OSC ability enabling fast response to changes in exhaust gas which does not greatly fluctuate in composition, but varies at a fast rate near the stoichiometric air-fuel ratio, an exhaust gas purification catalyst, and a honeycomb structure for exhaust gas purification are provided. A ceria-zirconia-based composite oxide oxygen storage material, which oxygen storage material has a molar ratio of cerium and zirconium, by cerium/(cerium+zirconium), of 0.33 to 0.90, has an ion conductivity measured by an AC impedance method of 1×10S/cm or more at 400° C., and contains metal ions M of one or more types of rare earth elements selected from Sm, Eu, Pr, Gd, and Dywith a coordination number of over 7.0 in an amount of 0.5 mol % to 15 mol % with respect to the total amount of cations.