Method and system for treating sulfur dioxide containing stream by catalytic oxidation and acid aqueous absorption
US-2026042058-A1 · Feb 12, 2026 · US
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Multi-stage SO3-conversion
Multi-stage SO3-conversion · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C01B17/765 |
| Official title | Multi-stage SO3-conversion |
| Display label | Multi-stage SO3-conversion |
| Total patents | 18 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 4 |
| 2021 | 1 |
| 2023 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Strong gas process and apparatus for sulfuric acid production
US-2025178899-A1 · Jun 5, 2025 · US
Method for inter-bed cooling in wet gas sulfuric acid plants
US-11543120-B2 · Jan 3, 2023 · US
Layout for inter-bed cooling in sulfuric acid plants
US-11007498-B2 · May 18, 2021 · US
Process for production of sulfuric acid
US-10829376-B2 · Nov 10, 2020 · US
A novel layout for inter-bed cooling in sulfuric acid plants
US-2020238241-A1 · Jul 30, 2020 · US
A method for inter-bed cooling in wet gas sulfuric acid plants
US-2020149735-A1 · May 14, 2020 · US
Process for the production of sulfur trioxide
US-10640376-B2 · May 5, 2020 · US
A process for the production of sulfur trioxide
US-2019177161-A1 · Jun 13, 2019 · US
Catalytic reactor
US-10300446-B2 · May 28, 2019 · US
Catalytic reactor
US-2018243714-A1 · Aug 30, 2018 · US
Process for production of sulfuric acid
US-2018127271-A1 · May 10, 2018 · US
A process for the oxidation of hydrogen sulfide to sulfur trioxide with subsequent sulfur removal and a plant for carrying out the process
US-2017239618-A1 · Aug 24, 2017 · US
Process for the oxidation of SO2 to SO3
US-9487401-B2 · Nov 8, 2016 · US
Sulphuric acid production with recycle of desulphurized gas
US-9045342-B2 · Jun 2, 2015 · US
Process for the oxidation of so2 to so3
US-2015147266-A1 · May 28, 2015 · US
Process and apparatus for sulphuric acid production
US-8951494-B2 · Feb 10, 2015 · US
Process for production of sulphuric acid
US-8926936-B2 · Jan 6, 2015 · US