US 11,806,675 B2
Method of vacuum membrane filtration
Sebastian Pruehl, Goettingen (DE); Karl Pflanz, Goettingen (DE); Juliane Grossmann, Goettingen (DE); and Michael Schuetzler, Goettingen (DE)
Assigned to SARTORIUS STEDIM BIOTECH GMBH
Filed by Sartorius Stedim Biotech GmbH, Goettingen (DE)
Filed on Jan. 24, 2023, as Appl. No. 18/101,064.
Application 18/101,064 is a division of application No. 16/761,893, abandoned, previously published as PCT/EP2018/078182, filed on Oct. 16, 2018.
Claims priority of application No. 10 2017 127 970.9 (DE), filed on Nov. 27, 2017.
Prior Publication US 2023/0166220 A1, Jun. 1, 2023
Int. Cl. B01D 69/10 (2006.01); B01D 63/08 (2006.01)
CPC B01D 69/10 (2013.01) [B01D 63/087 (2013.01); B01D 2313/025 (2013.01); B01D 2313/04 (2013.01); B01D 2313/10 (2013.01); B01D 2313/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of vacuum membrane filtration, comprising steps of:
placing a membrane filter between a filtration base and a pouring funnel, an upper side of the filtration base having a membrane bearing area with a bearing structure and a supporting contour surrounding the bearing structure for the membrane filter placed in the membrane bearing area, the supporting contour having at least one notch in flow connection with a bottom side of the membrane bearing area;
detachably mounting the pouring funnel on the filtration base, thereby clamping the membrane filter between the filtration base and the pouring funnel;
applying suction to the filtration base such that the membrane filter is pulled against the bearing structure and comes into contact with the supporting contour; and
dismounting the pouring funnel from the filtration base while still applying the suction, causing an outer rim of the membrane filter to bulge upward from the supporting contour and uncover the at least one notch.