DIFF Subgroup
F22D 1/50 incorporating thermal de-aeration of feed-water (de-aeration produced in the course of direct heat transfer F22D1/28)
Introduced: January 1980
Title
Titles differ between systems:
IPC: incorporating thermal de-aeration of feed-water
CPC: incorporating thermal de-aeration of feed-water (de-aeration produced in the course of direct heat transfer F22D1/28)
Full Title
Full titles differ between systems:
IPC:
Feed-water heaters, e.g. preheaters > incorporating thermal de-aeration of feed-water
CPC:
Feed-water heaters, i.e. economisers or like preheaters > incorporating thermal de-aeration of feed-water (de-aeration produced in the course of direct heat transfer F22D1/28)
No child classifications to compare. This is a leaf node in both IPC and CPC.