Water heater receiving humidified air
US-12241654-B2 · Mar 4, 2025 · US
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Flue gas recuperation
Flue gas recuperation · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F24D2200/18 |
| Official title | Flue gas recuperation |
| Display label | Flue gas recuperation |
| Total patents | 19 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 2 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Combined heating and cooling system
US-2024142138-A1 · May 2, 2024 · US
Heat exchange pipe, heat exchanger and water heating apparatus
US-11867428-B2 · Jan 9, 2024 · US
Heat recovery apparatus and methods of increasing energy efficiency of hybrid heating systems using the apparatus
US-11841147-B2 · Dec 12, 2023 · US
Water heater receiving humidified air
US-2023139832-A1 · May 4, 2023 · US
Heat recovery apparatus and methods of increasing energy efficiency of hybrid heating systems using the apparatus
US-2023134566-A1 · May 4, 2023 · US
Method and arrangement
US-2022154974-A1 · May 19, 2022 · US
Advanced Waste Heat Recovery in Industrial Fired-Heaters
US-2019331347-A1 · Oct 31, 2019 · US
Advanced waste heat recovery in industrial fired-heaters
US-2019257530-A1 · Aug 22, 2019 · US
Combined hot water and air heating and conditioning system including heat pump
US-10132507-B2 · Nov 20, 2018 · US
Electric power peak-shaving and combined heat and power waste heat recovery device and operation method thereof
US-10001326-B2 · Jun 19, 2018 · US
Combined fuel cell and boiler system
US-9917317-B2 · Mar 13, 2018 · US
Combined heat and power system for greenhouse carbon dioxide enrichment with unified transmission pipes for hot water and carbon dioxide
US-9756793-B2 · Sep 12, 2017 · US
Electric power peak-shaving and combined heat and power waste heat recovery device and operation method thereof
US-2016370122-A1 · Dec 22, 2016 · US
Power generation system and method of operating the same
US-9385384-B2 · Jul 5, 2016 · US
Fluidized bed heat exchange apparatus for recovering heat of flue gas for producing high temperature water
US-9360232-B2 · Jun 7, 2016 · US
Combined heat and power system for greenhouse carbon dioxide enrichment with unified transmission pipes for hot water and carbon dioxide
US-2016057943-A1 · Mar 3, 2016 · US
Structure for controlling temperature of hot-water supply from waste heat recovery system using three-way valve or mixing valve, and structure for controlling temperature of hot-water supply from waste heat recovery system using heat exchanger in hot-water tank
US-2015204577-A1 · Jul 23, 2015 · US
Combined fuel cell and boiler system
US-2015104725-A1 · Apr 16, 2015 · US