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:
Feb. 03, 2015
Filed:
Feb. 10, 2009
René Faber, Göttingen, DE;
Wolfgang Demmer, Göttingen, DE;
René Faber, Göttingen, DE;
Wolfgang Demmer, Göttingen, DE;
Sartorius Stedim Biotech GmbH, Goettingen, DE;
Abstract
There is proposed a separation method for mixtures of materials, using a cellulose hydrate membrane having a porous double structure which consists of micropores having a diameter in the range from >100 nm to 20 μm and ultrapores which have a diameter of <100 nm and which are not accessible to Blue Dextran having an average molecular weight Mw of 2 000 000, wherein the fraction of the volume of the ultrapores is more than 15% of the entire pore volume accessible to water, and wherein, in a preferred embodiment, sulfonic acid ligands are bonded to the membrane.