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. 05, 2013
Filed:
Jul. 06, 2007
Lothar Muβmann, Offenbach, DE;
Nicola Söger, Frankfurt am Main, DE;
Ralf Sesselmann, Ranstadt, DE;
Katja Adelmann, Rodenbach, DE;
Wolfgang Schneider, Rodenbach, DE;
Lothar Muβmann, Offenbach, DE;
Nicola Söger, Frankfurt am Main, DE;
Ralf Sesselmann, Ranstadt, DE;
Katja Adelmann, Rodenbach, DE;
Wolfgang Schneider, Rodenbach, DE;
Umicore AG & Co. KG, Hanau-Wolfgang, DE;
Abstract
Structured automotive catalysts which comprise a plurality of different catalytically active coatings arranged above one another on a support body and whose coatings contain transition metals and porous support materials are well known. Structured automotive catalysts of this type which do not belong to the group of three-way catalysts, in particular, frequently display large selectivity losses after thermal aging processes which can be attributed to the thermally induced migration of transition metal atoms from one layer into the neighboring coating. The introduction of a diffusion barrier which slows or prevents the thermally induced migration of transition metal atoms from one catalytically active layer into the other increases the thermal aging stability of such catalysts significantly.