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- The most active CPC classifications in Environmental Tech include: * '''[[CPC C02F1/42|C02F1/42]]''' (by ion-exchange (ion-exchange in general): 3 appli ...10 KB (1,215 words) - 16:06, 7 July 2025
- IPC Code(s): B01D17/04, B01D17/02, B01D19/00, B01J23/42, B01J35/04, C10G53/02 CPC Code(s): B01D17/042 ...32 KB (5,051 words) - 06:42, 9 May 2025
