Combustion chamber and gas apparatus
US-12442531-B2 · Oct 14, 2025 · US
Passages or apertures for delivering secondary air for completing combustion of fuel (baffles or deflectors in air inlets F23M9/02)
Passages or apertures for delivering secondary air for completing combustion of fuel (baffles or deflectors in air inlets F23M9/02) · 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 | F23L9/00 |
| Official title | Passages or apertures for delivering secondary air for completing combustion of fuel (baffles or deflectors in air inlets F23M9/02) |
| Display label | Passages or apertures for delivering secondary air for completing combustion of fuel (baffles or deflectors in air inlets F23M9/02) |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 6 |
| 2017 | 7 |
| 2018 | 7 |
| 2019 | 4 |
| 2020 | 4 |
| 2021 | 1 |
| 2022 | 6 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Burner Device with Primary Air Chamber, Staged Air Chamber, and Tertiary Air Chamber
US-2024344693-A1 · Oct 17, 2024 · US
Reverse-jet swirl pulverized coal burner with multi-stage recirculations
US-12117168-B2 · Oct 15, 2024 · US
Combustion apparatus
US-11988383-B2 · May 21, 2024 · US
Velocity damper for a recovery boiler
US-11719433-B2 · Aug 8, 2023 · US
Controlled secondary air supply range burner
US-11686472-B2 · Jun 27, 2023 · US
Combustion chamber and gas apparatus
US-2022373178-A1 · Nov 24, 2022 · US
Combustion Apparatus
US-2022333773-A1 · Oct 20, 2022 · US
Gas burner and hob comprising a gas burner
US-11268700-B2 · Mar 8, 2022 · US
Velocity damper for a recovery boiler
US-2022065447-A1 · Mar 3, 2022 · US
Velocity damper for a recovery boiler
US-11226095-B2 · Jan 18, 2022 · US
Reverse-jet swirl pulverized coal burner with multi-stage recirculations
US-2022003408-A1 · Jan 6, 2022 · US
Controlled secondary air supply range burner
US-2021372612-A1 · Dec 2, 2021 · US
Velocity damper for a recovery boiler
US-2020240635-A1 · Jul 30, 2020 · US
Combustion chamber assembly unit
US-2020182456-A1 · Jun 11, 2020 · US
Gas burner and hob comprising a gas burner
US-2020124288-A1 · Apr 23, 2020 · US
Combustion burner and boiler
US-10605455-B2 · Mar 31, 2020 · US
Gas burner apparatus and cooking apparatus including the same
US-10488051-B2 · Nov 26, 2019 · US
Premixed stamped inner flames burner with eccentric injection venturi
US-10352558-B2 · Jul 16, 2019 · US
Integrated process for oxy-fuel combustion and production of oxygen
US-10197274-B2 · Feb 5, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F23L9/00?
- CPC F23L9/00 is the Cooperative Patent Classification code for “Passages or apertures for delivering secondary air for completing combustion of fuel (baffles or deflectors in air inlets F23M9/02).”
- How many patents are filed under CPC F23L9/00 (Passages or apertures for delivering secondary air for completing combustion of fuel (baffles or deflectors in air inlets F23M9/02))?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC F23L9/00 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).