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. 20, 2021
Filed:
Jan. 12, 2016
Applicant:
Daicel Corporation, Osaka, JP;
Inventors:
Naohiro Oyamada, Himeji, JP;
Akihiro Higuchi, Himeji, JP;
Assignee:
DAICEL CORPORATION, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08B 3/06 (2006.01);
U.S. Cl.
CPC ...
C08B 3/06 (2013.01);
Abstract
Provided is cellulose acetate with which a hollow fiber membrane having excellent salt rejection and water permeability can be produced. The cellulose acetate, in which a total content of calcium and magnesium is 2.8 to 3.5 μmol/g; a 6 percent viscosity is 40 to 80 mPa·s; a degree of filtration Kw is 35 gor less; a molecular weight distribution Mw/Mn is 3.00 or less; and a degree of acetylation is 61.3 to 62.3%.