DIFF Subgroup
C01B 21/30 Preparation by oxidation of nitrogen
Introduced: September 1968
Full Title
Nitrogen; Compounds thereof > Nitrogen oxides; Oxyacids of nitrogen; Salts thereof > Nitric oxide (NO) > Preparation by oxidation of nitrogen
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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