Electrolyzer system including a heat pump and method of operating thereof
US-12529153-B2 · Jan 20, 2026 · US
Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion · 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 | F22B31/08 |
| Official title | Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion |
| Display label | Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion |
| Total patents | 27 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 3 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Heat exchanger tube block, exhaust heat recovery boiler, and method of constructing exhaust heat recovery boiler
US-12339077-B2 · Jun 24, 2025 · US
Electrolyzer system including a heat pump and method of operating thereof
US-2025163594-A1 · May 22, 2025 · US
System and Method for Combusting High-Moisture Fuel to Generate Steam
US-2025137637-A1 · May 1, 2025 · US
Gas-fired steam-injection boiler for oil field
US-2024353095-A1 · Oct 24, 2024 · US
Gas-fired steam boiler with gap structure
US-12117208-B2 · Oct 15, 2024 · US
STEAM SUPPLY SYSTEM AND STEAM SUPPLY METHOD FOR CAPTURING CARBON dioxide SHIP ONBOARD USING ENGINE COOLANT HEAT SOURCE AND HEAT PUMP
US-2024219083-A1 · Jul 4, 2024 · US
Gas-fired steam boiler with gap structure
US-2024183579-A1 · Jun 6, 2024 · US
Heat exchanger for a loopseal of a circulating fluidized bed boiler and a circulating fluidized bed boiler
US-11835298-B2 · Dec 5, 2023 · US
Heat exchanger for a loopseal of a circulating fluidized bed boiler and a circulating fluidized bed boiler
US-2022325961-A1 · Oct 13, 2022 · US
Heat exchanger tube block, exhaust heat recovery boiler, and method of constructing exhaust heat recovery boiler
US-2022034502-A1 · Feb 3, 2022 · US
Cooling pipe system
US-2022011027-A1 · Jan 13, 2022 · US
Boiler and modifying method thereof
US-11015801-B2 · May 25, 2021 · US
Heat exchanger, boiler, and setting method for heat exchanger
US-10955201-B2 · Mar 23, 2021 · US
Hybrid boiler-dryer and method
US-2020300454-A1 · Sep 24, 2020 · US
Boiler and method for controlling boiler
US-2020191382-A1 · Jun 18, 2020 · US
Waste-heat steam generator
US-10451267-B2 · Oct 22, 2019 · US
Heat exchanger, boiler, and setting method for heat exchanger
US-2019226774-A1 · Jul 25, 2019 · US
Boiler and modifying method thereof
US-2018328583-A1 · Nov 15, 2018 · US
Arrangement and method in soda recovery boiler
US-10119700-B2 · Nov 6, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F22B31/08?
- CPC F22B31/08 is the Cooperative Patent Classification code for “Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion.”
- How many patents are filed under CPC F22B31/08 (Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion)?
- Our database includes 27 publications tagged with this CPC code.
- Is patent activity under CPC F22B31/08 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).