Heater with remote combustion air addition
US-2025027643-A1 · Jan 23, 2025 · US
in vertical direction, e.g. alternating lean and rich zones
in vertical direction, e.g. alternating lean and rich zones · 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 | F23C2201/101 |
| Official title | in vertical direction, e.g. alternating lean and rich zones |
| Display label | in vertical direction, e.g. alternating lean and rich zones |
| Total patents | 43 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 7 |
| 2017 | 4 |
| 2018 | 6 |
| 2019 | 6 |
| 2020 | 6 |
| 2021 | 2 |
| 2022 | 5 |
| 2023 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Combustion device and boiler
US-2023288061-A1 · Sep 14, 2023 · US
Wall-arranged giant ring-shaped straight-through pulverized coal burner
US-2023280027-A1 · Sep 7, 2023 · US
Velocity damper for a recovery boiler
US-11719433-B2 · Aug 8, 2023 · US
Solid fuel burner and combustion device
US-11346546-B2 · May 31, 2022 · US
Method for operating a blast furnace
US-2022145410-A1 · May 12, 2022 · US
Petroleum residuum burning boiler and combustion method thereof
US-2022146090-A1 · May 12, 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
Over fire arrangement and method
US-10982843-B2 · Apr 20, 2021 · US
Combustion system for a boiler
US-10948182-B2 · Mar 16, 2021 · US
Reduced fouling in staged combustion
US-10859260-B2 · Dec 8, 2020 · US
Velocity damper for a recovery boiler
US-2020240635-A1 · Jul 30, 2020 · US
Overfire air system for low nitrogen oxide tangentially fired boiler
US-10634341-B2 · Apr 28, 2020 · US
Double-staged oxy-fuel burner
US-10584051-B2 · Mar 10, 2020 · US
Solid fuel burner and combustion device
US-2020072461-A1 · Mar 5, 2020 · US
Low NOx burner with exhaust gas recycle and partial premix
US-10533741-B2 · Jan 14, 2020 · US
System and method for reducing halogen levels necessary for mercury control, increasing the service life and/or catalytic activity of an SCR catalyst and/or control of multiple emissions
US-10471384-B2 · Nov 12, 2019 · US
Over fire arrangement and method
US-2019323705-A1 · Oct 24, 2019 · US
Combustion device
US-10359193-B2 · Jul 23, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F23C2201/101?
- CPC F23C2201/101 is the Cooperative Patent Classification code for “in vertical direction, e.g. alternating lean and rich zones.”
- How many patents are filed under CPC F23C2201/101 (in vertical direction, e.g. alternating lean and rich zones)?
- Our database includes 43 publications tagged with this CPC code.
- Is patent activity under CPC F23C2201/101 growing?
- Publication counts under this code: 3 in 2023 vs 1 in 2025 (latest complete years).