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:
Apr. 27, 2010
Filed:
Sep. 12, 2008
Yasushi Noguchi, Nagoya, JP;
Takehiko Watanabe, Toki, JP;
Yukari Nakane, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A process for producing a honeycomb structure by obtaining clay from a cordierite-forming raw material containing an alumina source, a silica source, and a magnesia source; and forming the clay into a honeycomb shape, wherein a material having, in its volume particle size distribution, a 50 volume % particle size (V50) [μm] of 1 to 25 μm is used, as each of alumina source, silica source, and magnesia source; and a material having, in the volume particle size distribution of the whole cordierite-forming raw material, a ratio of 90 volume % particle size (V90) [μm] to 10 volume % particle size (V10) [μm] [a volume particle size distribution ratio (V90/V10)] of 10 or less and a difference (V90−V10) between 90 volume % particle size (V90) [μm] and 10 volume % particle size (V10) [μm] of 25 μm or less is used, as the cordierite-forming raw material.