DIFF Subgroup
C02F 1/10 by direct contact with a particulate solid or with a fluid, as a heat transfer medium
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Treatment of water, waste water, or sewage > by heating > by distillation or evaporation > by direct contact with a particulate solid or with a fluid, as a heat transfer medium
CPC:
Treatment of water, waste water, or sewage (C02F3/00 - C02F9/00 take precedence) > by heating (methods of steam generation F22B; preheating boiler feed-water or accumulating preheated boiler feed-water F22D) > by distillation or evaporation > by direct contact with a particulate solid or with a fluid, as a heat transfer medium
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 1980.
Child Classifications
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