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. 29, 1980
Filed:
Jun. 17, 1977
Applicant:
Inventors:
Toru Seita, Shin-nanyo, JP;
Kenji Takahashi, Shin-nanyo, JP;
Shunichi Asami, Shin-nanyo, JP;
Akihiko Shimizu, Shin-nanyo, JP;
Assignee:
Toyo Soda Manufacturing Co. Ltd., Yamaguchi, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
2100 / ; 20415917 ; 521 27 ;
Abstract
A cation-exchange membrane is prepared by swelling a fluorinated polymer membrane having cation-exchangeable groups with an organic solvent and then removing the solvent from the swollen membrane and immersing a monomer with or without a crosslinking agent and a polymerization initiator into it and polymerizing the monomer. The membrane is preferably swollen with a water miscible organic solvent and then, the solvent is removed from the membrane.