Method for production of elemental sulfur and sulfuric acid
US-12545580-B2 · Feb 10, 2026 · US
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by contact processes
by contact processes · 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 | C01B17/76 |
| Official title | by contact processes |
| Display label | by contact processes |
| Total patents | 17 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 2 |
| 2022 | 4 |
| 2023 | 3 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
A process for conversion of aqueous hydrogen sulfide to sulfuric acid
US-2025154005-A1 · May 15, 2025 · 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
Revamping of a claus plant with a sulfuric acid plan
US-11618677-B2 · Apr 4, 2023 · 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
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
Process and plant for improved energy-efficient production of sulfuric acid
US-10150671-B2 · Dec 11, 2018 · US
Continuous process and apparatus for purifying so2-containing gases
US-2018117529-A1 · May 3, 2018 · US
Process and plant for improved energy-efficient production of sulfuric acid
US-2017349437-A1 · Dec 7, 2017 · US
Processes for producing sulfuric acid from sour tail gas field
US-9815693-B2 · Nov 14, 2017 · US
Process for the oxidation of SO2 to SO3
US-9487401-B2 · Nov 8, 2016 · US
Process for sulfonating halobenzene derivatives with sulfur trioxide
US-9394245-B2 · Jul 19, 2016 · US
Process for sulfonating halobenzene derivatives with sulfur trioxide
US-2015191425-A1 · Jul 9, 2015 · US
Process for the oxidation of so2 to so3
US-2015147266-A1 · May 28, 2015 · US