Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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B01D
SEPARATION
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2325/00
Details relating to properties of membranes
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B01D2325/02
Details relating to pores or porosity of the membranes
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B01D2325/022
Asymmetric membranes
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B01D2325/023
Dense layer within the membrane
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