Nixon & Vanderhye P.C.
Exhaust gas purifying filter
An exhaust gas purifying filter employs plugs that can be used as part of filter. The exhaust gas purifying filter has a honeycomb structure including a multitude of cells each surrounded by walls. Each of the cells is stopped with a plug on one end and the walls and the plugs are all made of a porous material. The value of M=(L/t)&times;(P1/P2) is in a range of 10<M<90, where P1 is the porosity of the walls, P 2 is the porosity of plugs, t is mean thickness of the walls and L is mean length of the plugs.
Denso Corporation
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Makoto Mikio Mamoru
Saito Ishihara Nishimura