Conduit preheating control
US-12486981-B2 · Dec 2, 2025 · US
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Water and air preheating systems
Water and air preheating systems · 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 | F22D1/36 |
| Official title | Water and air preheating systems |
| Display label | Water and air preheating systems |
| Total patents | 24 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 1 |
| 2018 | 7 |
| 2019 | 3 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Steam turbine system
US-2025154883-A1 · May 15, 2025 · US
Conduit preheating control
US-2024328619-A1 · Oct 3, 2024 · US
Vaporizer and vaporization supply device
US-2024101446-A1 · Mar 28, 2024 · US
Hybrid power generation equipment and control method thereof
US-11702964-B2 · Jul 18, 2023 · US
Hybrid power generation equipment
US-11391204-B2 · Jul 19, 2022 · US
Hybrid power generation equipment and control method thereof
US-2022136411-A1 · May 5, 2022 · US
Hybrid power generation equipment
US-2022136412-A1 · May 5, 2022 · US
Energy saving boiler system of steam supply
US-10883713-B2 · Jan 5, 2021 · US
Boiler
US-10730014-B2 · Aug 4, 2020 · US
Flue gas heat recovery integration
US-10288279-B2 · May 14, 2019 · US
Oxy boiler power plant oxygen feed system heat integration
US-10203112-B2 · Feb 12, 2019 · US
Split pass economizer bank with integrated water coil air heating and feedwater biasing
US-10197267-B2 · Feb 5, 2019 · US
Counterflow ion transport boiler system
US-10151474-B2 · Dec 11, 2018 · US
Counterflow ion transport boiler system
US-2018306433-A1 · Oct 25, 2018 · US
Energy saving boiler system of steam supply
US-2018209638-A1 · Jul 26, 2018 · US
Boiler
US-2018193796-A1 · Jul 12, 2018 · US
Fire tube boiler system with ion transport membranes
US-10018352-B1 · Jul 10, 2018 · US
Coal fired oxy plant with air separation unit including parallel coupled heat exchanger
US-10006634-B2 · Jun 26, 2018 · US
Coal fired Oxy plant with Flue Gas Heat Recovery
US-9915424-B2 · Mar 13, 2018 · US