Stock material or miscellaneous articles – Structurally defined web or sheet – Honeycomb-like
Reexamination Certificate
2003-06-17
2010-06-01
Sample, David R (Department: 1794)
Stock material or miscellaneous articles
Structurally defined web or sheet
Honeycomb-like
C428S327000, C428S304400, C428S192000, C501S154000, C055S523000
Reexamination Certificate
active
07727613
ABSTRACT:
A ceramic honeycomb structure comprising a ceramic honeycomb body comprising axial grooves on its periphery and cell walls constituting a larger number of flow paths inside the grooves, and a peripheral wall layer covering the grooves, wherein there are stress release portions at least partially in the peripheral wall layer and/or between the peripheral wall layer and the grooves. The thermal expansion coefficient of the peripheral wall layer is preferably smaller than those of the cell walls in a radial direction. The peripheral wall layer is preferably formed on the ceramic honeycomb body formed by removing a peripheral wall from a ceramic green body, before or after firing the ceramic honeycomb body.
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Kimura Toshiaki
Otsubo Yasuhiko
Suwabe Hirohisa
Gugliotta Nicole T
Hitachi Metals Ltd.
Sample David R
Sughrue & Mion, PLLC
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