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:
Aug. 19, 1997
Filed:
May. 05, 1995
Applicant:
Inventors:
Olaf Althoff, Niedernhausen, DE;
Uwe Falk, Wiesbaden, DE;
Ude Scheunemann, Liederbach, DE;
Werner Prass, Mainz, DE;
Werner Hickel, Ludwigshafen, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428421 ; 428422 ;
Abstract
A composite membrane comprises a porous carrier membrane (A) and a fluorine-containing permselective layer (C) which is a copolymer and has a thickness of 10 to 500 nm. The copolymer of layer (C) comprises