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:
Oct. 08, 1996
Filed:
Sep. 29, 1993
Applicant:
Inventors:
J urgen Schneider, Waldems, DE;
Reinhard Wagener, Kelkheim, DE;
Willi Kreuder, Mainz, DE;
Ulrich Delius, Frankfurt am Main, DE;
J urgen Wildhardt, H unstetten, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ; B01D / ;
U.S. Cl.
CPC ...
210490 ; 21050023 ; 21050038 ; 264 41 ;
Abstract
A semipermeable, porous, asymmetric membrane containing a polyetheramide which contains at least one or more dicarboxylic acid derivatives and aromatic diamines having a portion. The membrane is suitable for applications where contamination by glycerol or other platicizers or pore fillers must not be tolerated, may be dried without using a pore filler such as glycerol, does not collapse upon drying, and are sufficiently hydrophobic to be wetted again after complete drying.