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:
Mar. 04, 2014
Filed:
Jun. 27, 2007
Dieter Lindner, Hanau, DE;
Martin Roesch, Rodgau, DE;
Raoul Klingmann, Broken Arrow, OK (US);
Anke Wolf, Rio de Janeiro, BR;
Joerg-michael Richter, Frankfurt a.M., DE;
Dieter Lindner, Hanau, DE;
Martin Roesch, Rodgau, DE;
Raoul Klingmann, Broken Arrow, OK (US);
Anke Wolf, Rio de Janeiro, BR;
Joerg-Michael Richter, Frankfurt a.M., DE;
Umicore AG & Co. KG, Hanau-Wolfgang, DE;
Abstract
A double-layer three-way catalyst for purification of the exhaust gases from internal combustion engines which has excellent activity and thermal stability is described. The catalyst contains active aluminum oxide and a first cerium/zirconium mixed oxide which are both catalytically activated with palladium in the first layer applied to a catalyst support. In the second layer which is in direct contact with the exhaust gas, the catalyst likewise contains an active aluminum oxide and a second cerium/zirconium mixed oxide which are both catalytically activated with rhodium. The second cerium/zirconium mixed oxide has a higher zirconium oxide content than the first mixed oxide.