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. 28, 2011
Filed:
Jul. 02, 2007
Norio Umezu, Saitama, JP;
Kazumasa Mizui, Saitama, JP;
Norio Umezu, Saitama, JP;
Kazumasa Mizui, Saitama, JP;
Dynic Corporation, Kyoto-shi, JP;
Abstract
An air filter material includes a laminate of an air inlet layer and an air outlet layer, and has a mean flow pore size of 20 μm to 40 μm, a minimum pore size of 2.4 μm to 3.8 μm, and a maximum pore size of 80 μm or less. The air inlet layer is a needle punched nonwoven fabric layer having an areal fiber weight of 55 g/mto 100 g/m. The air outlet layer is a laminated spunlace nonwoven fabric made by laminating at least two or more spunlace nonwoven fabric layers having an areal fiber weight of 20 g/mto 60 g/m, a mean flow pore size of 50 μm to 90 μm, a minimum pore size of 3.0 μm to 10.0 μm, and a maximum pore size of 180 μm or less.