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| SECTION C– CHEMISTRY; METALLURGY |
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| C 04 | CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES (alloys based on refractory metals C 22 C) |
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| Note |
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| This class does not cover mechanical features provided for elsewhere, e.g. mechanical working B 28, kilns F 27. |
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| C 04 B | LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS (devitrified glass-ceramics C 03 C 10/00) |
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