Gas separation – Specific media material – Ceramic or sintered
Reexamination Certificate
2003-09-16
2008-01-08
Greene, Jason M. (Department: 1724)
Gas separation
Specific media material
Ceramic or sintered
C055S282200, C055S282300, C055S385300, C055S482000, C055S484000, C055SDIG010, C055SDIG030, C060S311000, C428S116000
Reexamination Certificate
active
07316722
ABSTRACT:
An object of the present invention is to provide a honeycomb structural body (filter) which has a low pressure loss upon collecting particulates, makes it possible to deposit a great amount of particulates and ashes, and is less likely to produce cracks. The columnar honeycomb structural body of the present invention includes a plurality of through holes placed in parallel with one another in the length direction, and wall portion that separates the plurality of through holes from one another and constitutes a circumferential face, wherein the plurality of through holes are composed of a group of large-capacity through holes, with one end thereof being sealed so as to cause the total of areas of cross-section perpendicular to the length direction to become relatively greater, and a group of small-capacity through holes, with the other end thereof being sealed so as to cause the total of areas of the above-mentioned cross-section to become relatively smaller, and the above-mentioned circumferential face of the columnar honeycomb structural body has a chamfered corner portion.
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Hong Sung-tae
Komori Teruo
Ohno Kazushige
Oshimi Yukio
Greene Jason M.
Ibiden Co. Ltd.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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