CPC Subgroup
C01B 32/312 Preparation
Full Title
Carbon; Compounds thereof (C01B21/00, C01B23/00 take precedence; percarbonates C01B15/10; carbon black C09C1/48) > Active carbon > Preparation
3 direct subcodes
Child Classifications
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- C01B 32/318 characterised by the starting materials
- C01B 32/336 characterised by gaseous activating agents
- C01B 32/342 characterised by non-gaseous activating agents