Specialized air distribution system and air distribution method for a waste incinerator with sludge co-incineration
US-2026078901-A1 · Mar 19, 2026 · US
by discharging the air above the fire
by discharging the air above the fire · 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 | F23L9/02 |
| Official title | by discharging the air above the fire |
| Display label | by discharging the air above the fire |
| Total patents | 43 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 5 |
| 2018 | 5 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 4 |
| 2022 | 1 |
| 2023 | 4 |
| 2024 | 4 |
| 2025 | 9 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Non-gas fire pit
US-12498115-B2 · Dec 16, 2025 · US
Hvac burner assembly and a method thereof
US-2025320997-A1 · Oct 16, 2025 · US
Combustion chamber and gas apparatus
US-12442531-B2 · Oct 14, 2025 · US
Fire pit with fire grate
US-2025164111-A1 · May 22, 2025 · US
Burner and combustion furnace
US-2025052420-A1 · Feb 13, 2025 · US
Burner and combustion furnace
US-2025052419-A1 · Feb 13, 2025 · US
Heater with remote combustion air addition
US-2025027643-A1 · Jan 23, 2025 · US
Fire pit with fire grate
US-12203652-B1 · Jan 21, 2025 · US
Fire pit with fire grate
US-2025012440-A1 · Jan 9, 2025 · US
Combustible fuel burning stove with fire grate
US-12117171-B2 · Oct 15, 2024 · US
Non-gas fire pit
US-2024288156-A1 · Aug 29, 2024 · US
Non-gas fire pit
US-11953198-B2 · Apr 9, 2024 · US
Combustible fuel burning stove with pellet adapter
US-2024068658-A1 · Feb 29, 2024 · US
Combustible fuel burning stove with pellet adapter
US-11774089-B1 · Oct 3, 2023 · US
Combustion device and boiler
US-2023288061-A1 · Sep 14, 2023 · US
Atmosphere-adjustable multi-staged swirl ammonia burner
US-11747014-B2 · Sep 5, 2023 · US
Atmosphere-adjustable multi-staged swirl ammonia burner
US-2023047390-A1 · Feb 16, 2023 · US
Combustion chamber and gas apparatus
US-2022373178-A1 · Nov 24, 2022 · US
Integrated self-powered heating system
US-2021210668-A1 · Jul 8, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F23L9/02?
- CPC F23L9/02 is the Cooperative Patent Classification code for “by discharging the air above the fire.”
- How many patents are filed under CPC F23L9/02 (by discharging the air above the fire)?
- Our database includes 43 publications tagged with this CPC code.
- Is patent activity under CPC F23L9/02 growing?
- Publication counts under this code: 4 in 2024 vs 9 in 2025 (latest complete years).