Patent ID: 7781371

Claim:
A filter catalyst, comprising: a catalyst-supporting substrate including a cellular wall demarcating plural cells of which opposite end openings are sealed alternately, the cellular wall being provided with multiple continuous pores; a first catalytic portion formed on a surface of a portion of the cellular wall, for decomposing and purifying a component to be purified contained in the exhaust gas, the first catalytic portion sealing the pores of the portion of the cellular wall of the catalyst-supporting substrate; and a second catalytic portion formed on an inside surface of the pores and forms a part of the cellular wall along the entire cellular wall, for decomposing and purifying a component to be purified contained in the exhaust gas, wherein the first catalytic portion purifies HC, CO and NO x , and the second catalytic portion purifies particulates, and the first catalytic portion is formed only in an upstream area of the cellular wall in an area from the upstream end of the cellular wall along ⅕ to ⅗ the axial length of the cellular wall.