Patent ID: 9687786
Date: 2017-06-27
CPC Classifications: B01D,F01N,Y02T

Claim:
1. A diesel particulate filter comprising: a. a wall-flow filter substrate having a mean pore size, an inlet side having an inlet surface, an outlet side, and a porous interior between the inlet and outlet sides; and b. a catalyst composition having a d wherein said d wherein the diesel particulate filter has a backpressure after exposure to soot that is less than the backpressure on a filter having the same catalyst composition where the catalyst composition is applied to: (1) the outlet of the filter at the same amount of catalyst or (2) to both the inlet and the outlet of the filter at equal loadings and the soot is applied to the inlet of the filter where half of the catalyst coating was applied to the inlet side of the filter and half of the catalyst coating was applied to the outlet side of the filter.