DIFF Subgroup
C04B 11/028 Devices therefor
Introduced: January 1985
Full Title
Full titles differ between systems:
IPC:
Calcium sulfate cements > Dehydrating gypsum > Devices therefor
CPC:
Calcium sulfate cements > dehydrating gypsum > Devices therefor
CPC subdivides this area 4x more granularly than IPC with 6 additional codes.
6 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1985.
Child Classifications
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- C04B 11/032 for the wet process, e.g. dehydrating in solution or under saturated vapour conditions, since 1985 IPC+CPC Available in IPC and CPC
- C04B 11/036 for the dry process, e.g. dehydrating in a fluidised bed or in a rotary kiln since 1985 IPC+CPC Available in IPC and CPC