Exhaust gas purifying apparatus and method for purifying...

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine

Reexamination Certificate

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Details

C423S213200, C422S168000, C422S177000, C422S180000, C060S311000

Reexamination Certificate

active

08057766

ABSTRACT:
An exhaust gas purifying apparatus includes a metal casing and a honeycomb filter installed in the metal casing. The honeycomb filter includes cells, a first end face, and a second end face. The cells include a first cell and a second cell provided alternately. The first cell includes an open end on the first end face side and a sealed end on the second end face side. The second cell includes an open end on the second end face side and a sealed end on the first end face side. A cross-sectional area of the first cell is smaller than a cross-sectional area of the second cell. The first end face is disposed on a gas inlet side of the metal casing. The second end face is disposed on a gas outlet side of the metal casing.

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