Patent ID: 7393376

Claim:
A ceramic filter assembly comprising: major and minor axes; a plurality of columnar honeycomb filters adhered together; the plurality of columnar honeycomb filters being made of a porous ceramic sintered material with a ceramic sealing material layer and having end faces and a generally elliptical cross sectional shape when cut parallel to the end faces of the plurality of honeycomb filters; the plurality of honeycomb filters including a honeycomb filter having a rectangular cross sectional shape when cut parallel to the end faces and provided with a long side having a length B 1 and a short side having a length B 2 in which the ratio B 1 /B 2 is between 1.1 and 3.0; the honeycomb filter being arranged so that the long side and the short side of the honeycomb filter are respectively parallel to the major axis and the minor axis of the assembly.