Exhaust Heat Recovery System
US-2025369609-A1 · Dec 4, 2025 · US
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and heated indirectly
and heated indirectly · 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 | F22D1/18 |
| Official title | and heated indirectly |
| Display label | and heated indirectly |
| Total patents | 12 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 3 |
| 2022 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Solar aided coal-fired power generation system participating in primary frequency regulation and control method thereof
US-11236633-B2 · Feb 1, 2022 · US
Solar aided coal-fired power generation system participating in primary frequency regulation and control method thereof
US-2021310365-A1 · Oct 7, 2021 · US
Supply-water warming system
US-2021262655-A1 · Aug 26, 2021 · US
Method and arrangement for generating process steam
US-10982388-B2 · Apr 20, 2021 · US
Boiler, steam-generating plant provided with same, and method for operating boiler
US-10844753-B2 · Nov 24, 2020 · US
Method and arrangement for generating process steam
US-2019127910-A1 · May 2, 2019 · US
System for combined flue gas heat recovery and dust precipitation improvement as retrofit solution for existing coal-fired power stations
US-10253973-B2 · Apr 9, 2019 · US
Boiler, steam-generating plant provided with same, and method for operating boiler
US-2018058267-A1 · Mar 1, 2018 · US
Boiler water supply preheater system and boiler water supply preheating method
US-9857074-B2 · Jan 2, 2018 · US
Boiler water supply preheater system and boiler water supply preheating method
US-2016138797-A1 · May 19, 2016 · US
Boiler operation method and boiler
US-2015377078-A1 · Dec 31, 2015 · US