Class F22D : PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER; FEED-WATER SUPPLY; CONTROLLING WATER LEVEL; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN BOILERS
Subclass 1/30: Feed-water heaters, e.g. preheaters for direct heat transfer, e.g. by mixing water and steam with stages, steps, baffles, dishes, circular troughs, or other means to cause interrupted or cascading fall of water
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 10718510 | Deaerator (options) | Jul 24, 15 | Jul 21, 20 | Joint-Stock Company Scientific Research And Design Institute For Energy Technologies Atomproekt |
| 9151184 | Heat exchangers, boilers, and systems incorporating the same | Mar 07, 14 | Oct 06, 15 | MOSI CHU IRREVOCABLE TRUST |
| 6173680 | Steam generator comprising an improved feedwater supply device | Apr 27, 99 | Jan 16, 01 | Framatome |
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