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:
Apr. 21, 2009
Filed:
Nov. 20, 2006
Applicants:
Ina Pahl, Hannover, DE;
Hans-weddo Schmidt, Hardegsen, DE;
Ulrich Grummert, Bad Sooden Allendorf, DE;
Inventors:
Ina Pahl, Hannover, DE;
Hans-Weddo Schmidt, Hardegsen, DE;
Ulrich Grummert, Bad Sooden Allendorf, DE;
Assignee:
Sartorius Stedim Biotech GmbH, Goettingen, DE;
Primary Examiner:
Int. Cl.
CPC ...
B01D 63/00 (2006.01); B01D 63/38 (2006.01); B01D 61/18 (2006.01); B01D 61/28 (2006.01); B01D 61/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An improved cross-flow filtration unit utilizing at least one two-ply membrane is disclosed that has a particular pore size relationship in the two membrane layers.