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. 26, 2011
Filed:
Aug. 24, 2007
Applicants:
Hyun-sik Han, Ansan, KR;
Tae-woo Lee, Ansan, KR;
Eun-seok Kim, Ansan, KR;
Inventors:
Assignee:
Heesung Catalysts Corporation, Shiheung, Kyungki-do, KR;
Primary Examiner:
Int. Cl.
CPC ...
B01D 50/00 (2006.01); B01J 23/40 (2006.01); B32B 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Herein is a three-layered catalyst system in which layers including predetermined precious metal components are sequentially layered on a substrate, and thus the conversion ratio of HC and CO is increased, thereby improving purification efficiency. The three-layered catalyst system includes a substrate, a lower layer containing a precious metal component of only platinum, an intermediate layer containing a precious metal component of only palladium, and an upper layer containing a precious metal component of only platinum, all of which are sequentially layered.