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:
Sep. 08, 2009
Filed:
Mar. 14, 2006
Manabu Isomura, Tsushima, JP;
Tatsuya Hishiki, Nagoya, JP;
Makoto Teranishi, Nagoya, JP;
Tomonori Takahashi, Chita, JP;
Manabu Isomura, Tsushima, JP;
Tatsuya Hishiki, Nagoya, JP;
Makoto Teranishi, Nagoya, JP;
Tomonori Takahashi, Chita, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A ceramic filter is provided, including a base body having partition walls made of a ceramic porous body and defining cells, filter membranes provided on the partition walls which are made of a ceramic porous body having an average pore diameter smaller than that of the surface of each partition wall, and a glass seal provided to cover at least the end face of the base body. The glass seal includes an alkali-free glass containing silica (SiO2) in an amount of 55 to 65 mol %, zirconia (ZrO2) in an amount of 1 to 10 mol % and at least one kind of alkaline earth metal oxide selected from calcia, baria and strontia, but which does not substantially contain zinc oxide.