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, 1995
Filed:
Jun. 01, 1993
Applicant:
Inventors:
Carl-Martin Bell, Stuttgart, DE;
Reinhold Deppisch, Hechingen, DE;
Hermann J Gohl, Bisingen-Zimmern, DE;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
21050041 ; 210490 ; 21050037 ; 21050039 ; 21050028 ; 264 48 ; 264 49 ; 4283044 ; 427245 ;
Abstract
Membranes composed of sulphonated polyaryl ether sulphones are disclosed in which the repetitive polymer units have the formula ##STR1## in which the aryl radicals are substituted by SO.sub.3 X where X is hydrogen or an alkali metal and the polymer includes from about 0.3 to 0.6 SO.sub.3 X radicals per unit. Processes for producing these membranes are also disclosed.