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:
Mar. 28, 2017
Filed:
Nov. 18, 2013
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Yukiko Hattori, Tokyo, JP;
Shintaro Fukunaga, Tokyo, JP;
Kazuo Umemura, Tokyo, JP;
Shigeru Aida, Tokyo, JP;
Atsushi Tsuji, Tokyo, JP;
Toshinori Tomita, Tokyo, JP;
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Abstract
To provide a fluorinated copolymer which is capable of providing an ion exchange membrane having little adverse effect due to impurities in an alkali chloride aqueous solution on electrolysis of the alkali chloride aqueous solution. To use a fluorinated copolymer of a fluorinated monomer having a carboxylic acid type functional group with a fluorinated olefin, wherein the proportion of components having a common logarithm (log M) of a molecular weight M being from 2.0 to 3.5 is at most 10 mass % per 100 mass % of components having a common logarithm (log M) of a molecular weight M being at least 2.0, contained in a CClFCFCClFH soluble content.