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:
Jun. 03, 2008
Filed:
Jun. 08, 2004
Applicants:
Rebecca Petersen, Flieden, DE;
Markus Hollas, Göttingen, DE;
Hans Beer, Waake, DE;
Manfred Bobbert, Obernfeld, DE;
Inventors:
Rebecca Petersen, Flieden, DE;
Markus Hollas, Göttingen, DE;
Hans Beer, Waake, DE;
Manfred Bobbert, Obernfeld, DE;
Assignee:
Sartorius Stedim Biotech GmbH, Goettingen, DE;
Primary Examiner:
Int. Cl.
CPC ...
B01D 71/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is disclosed a cellulosic microporous filtration membrane with upper and lower porous protective layers with a porous sponge-type intermediate layer between the two protective layers, wherein the sponge-type structure consists of two isotropic regions having different pore sizes.