DIFF Subgroup
C02F 1/02 by heating (methods of steam generation F22B; preheating boiler feed-water or accumulating preheated boiler feed-water F22D)
Introduced: January 1980
Title
Titles differ between systems:
IPC: by heating
CPC: by heating (methods of steam generation F22B; preheating boiler feed-water or accumulating preheated boiler feed-water F22D)
Full Title
Full titles differ between systems:
IPC:
Treatment of water, waste water, or sewage > by heating
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)
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1980.
Child Classifications
Navigate with arrow keys, Enter to open