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. 13, 2021
Filed:
Jun. 14, 2017
Applicant:
Asahi Kasei Kabushiki Kaisha, Tokyo, JP;
Inventors:
Yuki Miki, Tokyo, JP;
Daisuke Okamura, Tokyo, JP;
Hirokazu Fujimura, Tokyo, JP;
Masatoshi Hashino, Tokyo, JP;
Assignee:
ASAHI KASEI KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 69/02 (2006.01); B01D 71/34 (2006.01); B01D 71/68 (2006.01); B01D 69/08 (2006.01); B01D 67/00 (2006.01); B01D 71/52 (2006.01); B01D 61/14 (2006.01); B01D 71/44 (2006.01); C08J 9/28 (2006.01); D01F 6/12 (2006.01);
U.S. Cl.
CPC ...
B01D 69/02 (2013.01); B01D 67/0016 (2013.01); B01D 69/081 (2013.01); B01D 71/34 (2013.01); B01D 71/68 (2013.01); C08J 9/28 (2013.01); D01F 6/12 (2013.01); B01D 61/145 (2013.01); B01D 69/08 (2013.01); B01D 71/44 (2013.01); B01D 71/52 (2013.01); B01D 2323/02 (2013.01); B01D 2325/022 (2013.01); B01D 2325/04 (2013.01); B01D 2325/06 (2013.01); B01D 2325/20 (2013.01); B01D 2325/24 (2013.01); B01D 2325/28 (2013.01); B01D 2325/34 (2013.01);
Abstract
A porous membrane has a thickness of 150 μm or greater. The pore diameters of a first surface are smaller than the pore diameters of a second surface. The average value of the pore diameters of the first surface is 60 nm or less, and the coefficient of variation of the pore diameters is 10% or greater and 50% or less.