IPC Subgroup
C04B 11/028 Devices therefor
Introduced: January 1985
Last revised: January 2006
Full Title
Calcium sulfate cements > Dehydrating gypsum > Devices therefor
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- Subclass:
- LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
2 direct subcodes
Child Classifications
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- C04B 11/032 for the wet process, e.g. dehydrating in solution or under saturated vapor conditions
- C04B 11/036 for the dry process, e.g. dehydrating in a fluidised bed or in a rotary kiln