Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
Reexamination Certificate
2005-02-22
2005-02-22
Ildebrando, Christina (Department: 1725)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Mixture is exhaust from internal-combustion engine
C502S302000, C502S303000, C502S304000, C502S328000, C502S330000, C502S332000, C502S334000, C502S339000, C502S340000, C502S341000, C502S344000, C502S355000
Reexamination Certificate
active
06858193
ABSTRACT:
The invention relates to a catalyst for lowering the amount of NOxin the lean exhaust gas from lean burn engines, comprising active aluminum oxide, magnesium oxide and at least one noble metal of the platinum group of the periodic table of the elements, as well as at least one nitrogen oxide storage material. The catalyst is characterized in that the magnesium oxide forms a homogeneous mixed oxide with aluminum oxide and is present in a concentration of about 1 to about 40 wt.-%, based on the total weight of the mixed oxide.
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European Search Report, OMG AG & Co. KG, Feb. 6, 2003.
Domesle Rainer
Göbel Ulrich
Ruwisch Lutz Marc
Theis Juliane
Ildebrando Christina
Kalow & Springut LLP
Umicore AG & Co. KG
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