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:
May. 19, 1981
Filed:
Mar. 05, 1979
Applicant:
Inventors:
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
528486 ; 20415914 ; 204165 ; 210 / ; 210 / ; 210 / ; 2105 / ; 528485 ; 528487 ; 528488 ; 264 22 ;
Abstract
A process for improving the performances of semipermeable membranes which comprise an acrylonitrile polymer containing 40 to 100% by mole of acrylonitrile and have a bubble point of more than 0.1 kg/cm.sup.2, by dipping said membranes in an aqueous solution containing inorganic salts and/or protic acids.