Method for heating steel sheet, method for producing coated steel sheet, direct fired furnace, and continuous hot-dip galvanizing facility
US-2025388989-A1 · Dec 25, 2025 · US
Regulating air supply or draught (conjointly with fuel supply F23N1/00)
Regulating air supply or draught (conjointly with fuel supply F23N1/00) · 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 | F23N3/00 |
| Official title | Regulating air supply or draught (conjointly with fuel supply F23N1/00) |
| Display label | Regulating air supply or draught (conjointly with fuel supply F23N1/00) |
| Total patents | 49 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 10 |
| 2017 | 6 |
| 2018 | 2 |
| 2019 | 8 |
| 2020 | 3 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 4 |
| 2024 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems and methods for operation of a flexible fuel combustor
US-2025189135-A1 · Jun 12, 2025 · US
Systems and methods for operation of a flexible fuel combustor
US-12259136-B2 · Mar 25, 2025 · US
Artificial intelligence-based optimal air damper control system and method for increasing energy efficiency of industrial boilers
US-2024191871-A1 · Jun 13, 2024 · US
Systems and methods for operation of a flexible fuel combustor
US-2023383950-A1 · Nov 30, 2023 · US
Systems and methods for operation of a flexible fuel combustor
US-11828468-B2 · Nov 28, 2023 · US
Combustion device and boiler
US-2023288062-A1 · Sep 14, 2023 · US
Method and shaft furnace for burning carbon-containing material in a shaft furnace
US-11703280-B2 · Jul 18, 2023 · US
Steam generator and car washer with steam generator
US-11525572-B2 · Dec 13, 2022 · US
Method and shaft furnace for burning carbon-containing material in a shaft furnace
US-2022170698-A1 · Jun 2, 2022 · US
Systems and methods for operation of a flexible fuel combustor
US-2022074594-A1 · Mar 10, 2022 · US
Systems and methods for operation of a flexible fuel combustor
US-11199327-B2 · Dec 14, 2021 · US
Steam Generator and Car Washer with Steam Generator
US-2021364162-A1 · Nov 25, 2021 · US
Fuel-operated vehicle heating device and method to operating a fuel-operated vehicle heating device
US-11148504-B2 · Oct 19, 2021 · US
Gas-assisted liquid fuel oxygen reactor
US-10995948-B2 · May 4, 2021 · US
Fuel-operated vehicle heating device and method to operating a fuel-operated vehicle heating device
US-2021114434-A1 · Apr 22, 2021 · US
Furnace wall, gasification unit and integrated gasification combined cycle, and method of manufacturing furnace wall
US-10954853-B2 · Mar 23, 2021 · US
Method for preheating a fluid upstream of a furnace
US-10788208-B2 · Sep 29, 2020 · US
Radiant boiler for pressurized oxy-combustion and method of radiant trapping to control heat flux in high temperature particle-laden flows at elevated pressure
US-10731847-B2 · Aug 4, 2020 · US
Burner assembly and method for combustion of gaseous or liquid fuel
US-10684010-B2 · Jun 16, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F23N3/00?
- CPC F23N3/00 is the Cooperative Patent Classification code for “Regulating air supply or draught (conjointly with fuel supply F23N1/00).”
- How many patents are filed under CPC F23N3/00 (Regulating air supply or draught (conjointly with fuel supply F23N1/00))?
- Our database includes 49 publications tagged with this CPC code.
- Is patent activity under CPC F23N3/00 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).