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:
Dec. 25, 2012
Filed:
Jan. 14, 2003
Volker Hennige, Duelmen, DE;
Christian Hying, Rhede, DE;
Gerhard Hoerpel, Nottuln, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
The present invention relates to membranes and to a process for making them. The membranes according to the invention comprise a sheetlike flexible substrate having a multiplicity of openings and having a coating on and in said substrate, the material of said substrate being selected from nonwovens of polymeric fibers, said nonwovens having a porosity of more than 50% and said coating being a porous ceramic coating, said substrate preferably being from 10 to 200 μm in thickness. Such membranes provide a distinctly higher flux than conventional membranes. The membranes are useful as separators for batteries or as a microfiltration membrane.