Low nox gas burner with cooled flue gas recycle
US-2026036297-A1 · Feb 5, 2026 · US
Control of recirculation rate
Control of recirculation rate · 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 | F23C2202/50 |
| Official title | Control of recirculation rate |
| Display label | Control of recirculation rate |
| Total patents | 31 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 8 |
| 2017 | 1 |
| 2018 | 5 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 2 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Low NOx gas burner with cooled flue gas recycle
US-12460814-B2 · Nov 4, 2025 · US
Oxy-PFBC temperature management through staged gas injection and gas velocity management
US-12338991-B2 · Jun 24, 2025 · US
Low nox gas burner with cooled flue gas recycle
US-2023213182-A1 · Jul 6, 2023 · US
Low nox gas burner with cooled flue gas recycle
US-2023213181-A1 · Jul 6, 2023 · US
System and method for combustion of non-gaseous fuels and derivatives thereof
US-2022412557-A1 · Dec 29, 2022 · US
System and method for combustion of non-gaseous fuels and derivatives thereof
US-11435077-B2 · Sep 6, 2022 · US
Oil boiler
US-11255574-B2 · Feb 22, 2022 · US
Oxy-combustion process with modular boiler design
US-11029020-B2 · Jun 8, 2021 · US
System and method for combustion of non-gaseous fuels and derivatives thereof
US-2021116126-A1 · Apr 22, 2021 · US
System and method for combustion of non-gaseous fuels and derivatives thereof
US-10859264-B2 · Dec 8, 2020 · US
Oil boiler
US-2020348047-A1 · Nov 5, 2020 · US
Pre-mixed fuel burner with perforated flame holder
US-10808927-B2 · Oct 20, 2020 · US
Turbine including flue gas recirculation combustor
US-10590847-B2 · Mar 17, 2020 · US
Oxy-combustion process with modular boiler design
US-2019368722-A1 · Dec 5, 2019 · US
Turbine system with exhaust gas recirculation, separation and extraction
US-10316746-B2 · Jun 11, 2019 · US
Turbine system with exhaust gas recirculation, separation and extraction
US-10253690-B2 · Apr 9, 2019 · US
Combustion gas supply system
US-2018292085-A1 · Oct 11, 2018 · US
Systems and methods for high volumetric oxidant flow in gas turbine engine with exhaust gas recirculation
US-10094566-B2 · Oct 9, 2018 · US
System and method for combustion of non-gaseous fuels and derivatives thereof
US-2018259183-A1 · Sep 13, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F23C2202/50?
- CPC F23C2202/50 is the Cooperative Patent Classification code for “Control of recirculation rate.”
- How many patents are filed under CPC F23C2202/50 (Control of recirculation rate)?
- Our database includes 31 publications tagged with this CPC code.
- Is patent activity under CPC F23C2202/50 growing?
- Publication counts under this code: 2 in 2023 vs 2 in 2025 (latest complete years).