Patent ID: 8080211

Claim:
A honeycomb filter comprising: a honeycomb structure having cell walls extending along a longitudinal direction of the honeycomb structure to define cells between the cell walls, each of the cells being sealed at either end of each of the cells; and a zeolite supported on the cell walls of the honeycomb structure, wherein an amount of the zeolite supported on the cell walls is from about 80 g/L to about 150 g/L, a porosity of the cell walls of the honeycomb structure is from about 55% to about 65%, a cell density in a cross section perpendicular to the longitudinal direction of the honeycomb structure is from about 46.5 pcs/cm 2 to about 62.0 pcs/cm 2 , a thickness of the cell walls of the honeycomb structure is from about 0.2 mm to about 0.3 mm, the cells include a large volume cell and a small volume cell, and an area ratio of a cross sectional area of the large volume cell perpendicular to the longitudinal direction relative to a cross sectional area of the small volume cell perpendicular to the longitudinal direction is from about 1.4 to about 2.4.