CPC Main Group
C09K 21/00 Fireproofing materials (for use in a particular application, see the relevant places, e.g. fireproofing of wood B27K, of polymers C08, of textiles D06M, of paper D21H; fireproof paints C09D5/18)
3 direct subcodes
Child Classifications
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- C09K 21/02 Inorganic materials
- C09K 21/06 Organic materials
- C09K 21/14 Macromolecular materials