METHOD OF PRODUCING H2 AND/OR BR2 BY ELECTROLYSING HBr USING FLUOROPOLYMER MEMBRANES
US-2025263859-A1 · Aug 21, 2025 · US
Sulfur trioxide; Sulfuric acid
Sulfur trioxide; Sulfuric acid · 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 | C01B17/69 |
| Official title | Sulfur trioxide; Sulfuric acid |
| Display label | Sulfur trioxide; Sulfuric acid |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2017 | 4 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 5 |
| 2022 | 6 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of electrolysing hydrogen bromide after h2so4 synthesis
US-2025257477-A1 · Aug 14, 2025 · US
Methods and systems for automatically generating a remedial action in an industrial facility
US-12190701-B2 · Jan 7, 2025 · US
Process to convert reduced sulfur species and water into hydrogen and sulfuric acid
US-12110601-B2 · Oct 8, 2024 · US
Process of converting carbon dioxide using combination of carbon dioxide mineralization process and metabolism of sulfur-oxidizing microorganisms
US-11845969-B2 · Dec 19, 2023 · US
Methods and systems for automatically generating a remedial action in an industrial facility
US-2023360511-A1 · Nov 9, 2023 · US
Method for producing hydrogen fluoride
US-11718523-B2 · Aug 8, 2023 · US
Process to convert reduced sulfur species and water into hydrogen and sulfuric acid
US-2022411940-A1 · Dec 29, 2022 · US
Methods and systems for automatically generating a remedial action in an industrial facility
US-11508230-B2 · Nov 22, 2022 · US
Method for the purification of alkanes
US-11479522-B2 · Oct 25, 2022 · US
Method for inhibiting reduction in concentration of oxidizing agent in sulfuric acid solution containing persulfuric acid component
US-2022325421-A1 · Oct 13, 2022 · US
Method for the purification of alkanes
US-2022153662-A1 · May 19, 2022 · US
Process To Convert Reduced Sulfur Species And Water Into Hydrogen And Sulfuric Acid
US-2022106691-A1 · Apr 7, 2022 · US
Process to convert reduced sulfur species and water into hydrogen and sulfuric acid
US-11180860-B2 · Nov 23, 2021 · US
Sulfuric acid alkylation reactor system and conversion of a hydrogen fluoride alkylation unit to a sulfuric acid alkylation unit
US-2021154640-A1 · May 27, 2021 · US
Method for producing hydrogen fluoride
US-2021147230-A1 · May 20, 2021 · US
Method for production of sulfur and sulfuric acid
US-10981788-B2 · Apr 20, 2021 · US
Method for producing hydrogen fluoride
US-10934166-B2 · Mar 2, 2021 · US
Method for production of sulfur and sulfuric acid
US-2020317519-A1 · Oct 8, 2020 · US
Conversion of a hydrogen fluoride alkylation unit to a sulfuric acid alkylation unit and apparatus utilized therein
US-2020197895-A1 · Jun 25, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B17/69?
- CPC C01B17/69 is the Cooperative Patent Classification code for “Sulfur trioxide; Sulfuric acid.”
- How many patents are filed under CPC C01B17/69 (Sulfur trioxide; Sulfuric acid)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC C01B17/69 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).