The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 2009
Filed:
Aug. 20, 2004
Tsutomu Fukuda, Kakogawa, JP;
Masahiro Fukuda, Uji, JP;
Masaaki Fukuda, Kakogawa, JP;
Toshinobu Yoko, Uji, JP;
Masahide Takahashi, Uji, JP;
Tsutomu Fukuda, Kakogawa, JP;
Masahiro Fukuda, Uji, JP;
Masaaki Fukuda, Kakogawa, JP;
Toshinobu Yoko, Uji, JP;
Masahide Takahashi, Uji, JP;
Ohcera Co., Ltd., Osaka-shi, JP;
Abstract
Provided is a honeycomb filter which includes an aluminum titanate sintered product obtained by a process involving firing at a temperature of 1,250-1,700° C. a raw material mixture composed of: 100 wt. % of a first mixture having TiOand AlOin a molar ratio of 40-60/60-40; and 1-10 wt. % of a second mixture composed of: an alkali feldspar according to the formula NaKAlSiO, wherein 0≦y≦1; and a component selected from an oxide having a spinel structure composed of Mg and/or MgO, MgO and a precursor compound composed of Mg that is converted to MgO by firing, wherein the honeycomb filter exhibits excellent properties with respect to mechanical strength, thermal decomposition resistance, thermal shock resistance and thermal stability at high and fluctuating temperatures. Also provided is a method and an apparatus for cleaning an exhaust gas by removing solid particles predominantly containing carbon from the exhaust gas with the honeycomb filter. Also provided is a process for producing the honeycomb filter.