Method for production of elemental sulfur and sulfuric acid
US-12545580-B2 · Feb 10, 2026 · US
with fuel supply in stages (for staged combustion F23C6/047)
with fuel supply in stages (for staged combustion F23C6/047) · 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 | F23C6/042 |
| Official title | {with fuel supply in stages (for staged combustion F23C6/047)} |
| Display label | with fuel supply in stages (for staged combustion F23C6/047) |
| Total patents | 51 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 5 |
| 2017 | 3 |
| 2018 | 3 |
| 2019 | 8 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 9 |
| 2023 | 4 |
| 2024 | 1 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Low nox, high efficiency, high temperature, staged recirculating burner and radiant tube combustion system
US-2025327568-A1 · Oct 23, 2025 · US
Low NOx, high efficiency, high temperature, staged recirculating burner and radiant tube combustion system
US-12352433-B2 · Jul 8, 2025 · US
Reverse-jet swirl pulverized coal burner with multi-stage recirculations
US-12117168-B2 · Oct 15, 2024 · US
Method for production of elemental sulfur by part or fully catalytic oxidation of Claus tail gas
US-11807527-B2 · Nov 7, 2023 · US
Method for production of sulfur and sulfuric acid
US-11691877-B2 · Jul 4, 2023 · US
Combustion process
US-2023194082-A1 · Jun 22, 2023 · US
Revamping of a claus plant with a sulfuric acid plan
US-11618677-B2 · Apr 4, 2023 · US
Method and device for heating object to be heated
US-11534823-B2 · Dec 27, 2022 · US
Low nox, high efficiency, high temperature, staged recirculating burner and radiant tube combustion system
US-2022275932-A1 · Sep 1, 2022 · US
Method for production of elemental sulfur by part or fully catalytic oxidation of claus tail gas
US-2022234891-A1 · Jul 28, 2022 · US
Method for production of elemental sulfur and sulfuric acid
US-2022227625-A1 · Jul 21, 2022 · US
Low NOx, high efficiency, high temperature, staged recirculating burner and radiant tube combustion system
US-11365880-B2 · Jun 21, 2022 · US
Revamping of a claus plant with a sulfuric acid plan
US-2022177306-A1 · Jun 9, 2022 · US
Method for production of sulfur and sulfuric acid
US-2022177307-A1 · Jun 9, 2022 · US
Method of controlling fuel injection in a reheat combustor for a combustor unit of a gas turbine
US-11242806-B2 · Feb 8, 2022 · US
Reverse-jet swirl pulverized coal burner with multi-stage recirculations
US-2022003408-A1 · Jan 6, 2022 · US
Fuel combustion system with a perforated reaction holder
US-11156356-B2 · Oct 26, 2021 · US
Oxy-combustion process with modular boiler design
US-11029020-B2 · Jun 8, 2021 · US
Method for a part load CO reduction operation for a sequential gas turbine
US-10907549-B2 · Feb 2, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F23C6/042?
- CPC F23C6/042 is the Cooperative Patent Classification code for “with fuel supply in stages (for staged combustion F23C6/047).”
- How many patents are filed under CPC F23C6/042 (with fuel supply in stages (for staged combustion F23C6/047))?
- Our database includes 51 publications tagged with this CPC code.
- Is patent activity under CPC F23C6/042 growing?
- Publication counts under this code: 1 in 2024 vs 2 in 2025 (latest complete years).