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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67/00
Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
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B01D67/0002
Organic membrane manufacture
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B01D67/0023
by inducing porosity into non porous precursor membranes
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B01D67/0025
by mechanical treatment, e.g. pore-stretching
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