Nixon & Vanderhye PC
Exhaust gas purification filter
An exhaust purification filter having high filter efficiency and low pressure loss. The exhaust purification filter purifies exhaust gas by trapping particulate matter contained in exhaust gas discharged from an internal combustion engine. The exhaust gas purification filter has a honeycomb structure composed of partitions having a large number of pores, and cells separated by the partitions. The surface opening area of the partitions attributable to pores having a surface opening diameter of 10 &mgr;m or less is 20% or less of the total surface opening area ratio.
Denso Corporation
F B C F F Y Y C F
F01N B01D C04B F01N F01N Y10S Y02T C04B F01N
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Mamoru Mikio
Nishimura Ishihara