Method of making a NOx adsorber catalyst

Details Method of making a NOx adsorber catalyst Method of making a NOx adsorber catalyst

2003-07-23

2008-05-20

Johnson, Edward M. (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Miscellaneous

Reexamination Certificate

active

07375056

ABSTRACT:
A treatment element and an exhaust emission control device for the treatment of gases in an exhaust passage of an internal combustion engine and methods of making thereof are described. In the method, at least two different catalyst compositions are applied along the major axis length of a single substrate to form a treatment element having at least two different zones of catalyst composition.

REFERENCES:
patent: 5866210 (1999-02-01), Rosynsky et al.
patent: 6217831 (2001-04-01), Suzuki et al.
patent: 6391822 (2002-05-01), Dou et al.
patent: 6729125 (2004-05-01), Suga et al.

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