Honeycomb filter for exhaust gas decontamination, adhesive,...

Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Waste gas purifier

Reexamination Certificate

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Details

C422S168000, C422S177000, C422S178000, C422S211000, C055S523000, C060S311000

Reexamination Certificate

active

08029737

ABSTRACT:
A honeycomb filter for purifying exhaust gases includes columnar porous ceramic members and an adhesive layer combing the ceramic members with one another. Each porous ceramic member has a partition wall and through holes. The through holes are extending in parallel in length direction of the ceramic members. The partition wall is separating the through holes and filters particulates in exhaust gas. The through holes include ones sealed at inlet side of the ceramic members and ones sealed at outlet side of the ceramic members such that the exhaust gas enters from the inlet side, passes through the partition wall and flows out from the outlet side. The adhesive layer has thermal expansion coefficient αL. The ceramic members have thermal expansion coefficient αF. The thermal expansion coefficient αLof the adhesive layer and the thermal expansion coefficient αFof the ceramic members satisfy relationship, 0.01<|αL−αF|/αF<1.0.

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