Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
Load children
B01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Load children
B01D
SEPARATION
Load children
71/00
Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
Load children Filter patents View analytics View as hierarchy
B01D71/40
Polymers of unsaturated acids or derivatives thereof, e.g. salts, amides, imides, nitriles, anhydrides, esters
Load children Filter patents View analytics View as hierarchy
B01D71/42
Polymers of nitriles, e.g. polyacrylonitrile
Load children Filter patents View analytics View as hierarchy