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:
Jul. 31, 2012
Filed:
Aug. 21, 2008
Yusuke Hatanaka, Haibara-gun, JP;
Yusuke Hatanaka, Haibara-gun, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A method of cross-flow filtration using a membrane filter has a feeding a fluid to be filtered across a membrane surface of a porous alumina membrane filter serving as the membrane filter so that the fluid flows parallel to the membrane surface to separate material to be filtered with the porous alumina membrane filter. The porous alumina membrane filter is made of an aluminum anodized film and includes micropores having a degree of ordering as defined by formula (1):Degree of ordering (%)=×100  (1)of at least 50%, a porosity as defined by formula (2):Porosity (%)=×100  (2)of at least 40%, and a percentage of a pore size standard deviation to an average pore size of up to 10%.