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:
Aug. 18, 2020
Filed:
Feb. 26, 2015
Applicant:
Kuraray Co., Ltd., Kurashiki-shi, JP;
Inventors:
Assignee:
KURARAY CO., LTD., Kurashiki-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01D 69/08 (2006.01); B01D 71/34 (2006.01); B01D 69/02 (2006.01); B01D 67/00 (2006.01); B01D 71/32 (2006.01); D01F 1/08 (2006.01); B01D 71/44 (2006.01); B01D 63/02 (2006.01);
U.S. Cl.
CPC ...
B01D 69/08 (2013.01); B01D 67/0006 (2013.01); B01D 67/0011 (2013.01); B01D 67/0016 (2013.01); B01D 67/0093 (2013.01); B01D 69/02 (2013.01); B01D 71/32 (2013.01); B01D 71/34 (2013.01); D01F 1/08 (2013.01); B01D 63/02 (2013.01); B01D 71/44 (2013.01); B01D 2323/02 (2013.01); B01D 2323/06 (2013.01); B01D 2323/12 (2013.01); B01D 2323/30 (2013.01); B01D 2325/022 (2013.01); B01D 2325/20 (2013.01); B01D 2325/24 (2013.01); B01D 2325/36 (2013.01);
Abstract
One aspect of the present invention concerns a porous hollow fiber membrane containing a vinylidene fluoride-based resin. The hollow fiber membrane has a gradient structure in which a pore diameter of pores in the hollow fiber membrane gradually becomes smaller at least toward one of inner and outer peripheral surface sides and is hydrophilized by containing a crosslinked body of a polyvinylpyrrolidone-based resin.