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. 09, 2002
Filed:
Feb. 01, 2001
Ulrich Grummert, Göttingen, DE;
Hans Weddo-Schmidt, Hardegsen, DE;
Sartorius AG, , DE;
Abstract
The invention relates to improved cross-flow filter cassettes for the filtration of liquid media, which are used in cross-flow filtration devices of varying pump outputs and can be fitted with non-reinforced membranes. The cassettes comprise at least one retentate separator in which the inlets to the open perforations designed to form one type of channel, for example for retentate discharge, are larger than the inlets to the open perforations designed to form another type of channel, for example for fluid feed. In comparison with known cross-flow filter cassettes, the cross-flow filter cassettes of the invention allow retentate flows required to achieve equal filtration output at equal pressure differential on the retentate side at least 1.8 times lower. This significantly reduces the energy input required for pumping to conduct cross-flow filtration.