IPC Definitions - January 01, 2012
B01D 53/22 - Definition
Attention is drawn to the following places, which may be of interest for search:
Manufacturing semi-permeable membranes | B01D 67/00 |
Form, structure or properties of semi-permeable membranes | B01D 69/00 |
Material for semi-permeable membranes | B01D 71/00 |