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. 05, 2011
Filed:
Mar. 13, 2003
Applicants:
Thomas Lengsfeld, Marburg, DE;
Heinrich Schneider, Lahntal, DE;
Inventors:
Thomas Lengsfeld, Marburg, DE;
Heinrich Schneider, Lahntal, DE;
Assignee:
ZLB Behring GmbH, Marburg, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07K 14/775 (2006.01); A61K 38/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for separating off viruses from a protein solution by nanofiltration, comprising adding to the protein solution at least one ingredient chosen from chaotropic substances chosen from arginine, guanidine, citrulline, urea and derivatives thereof and salts thereof, and compounds chosen from polyethoxysorbitan esters and derivatives thereof, prior to the nanofiltration, in order to decrease or prevent aggregation of the protein molecules, and then filtering the solution through a filter having a pore size ranging from 15 nm to less than 35 nm.