Concentration of sulfuric acid
US-12577104-B2 · Mar 17, 2026 · US
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Concentration of sulfuric acid
Concentration of 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 | C01B17/88 |
| Official title | Concentration of sulfuric acid |
| Display label | Concentration of sulfuric acid |
| Total patents | 20 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2017 | 2 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 4 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of cleaning an apparatus used in the concentration of a mineral acid
US-12441614-B2 · Oct 14, 2025 · US
Process to convert reduced sulfur species and water into hydrogen and sulfuric acid
US-12110601-B2 · Oct 8, 2024 · US
Process for concentrating diluted sulfuric acid
US-2023406704-A1 · Dec 21, 2023 · US
Concentration of sulfuric acid
US-2023117014-A1 · Apr 20, 2023 · US
Method of cleaning an apparatus used in the concentration of a mineral acid
US-2023016848-A1 · Jan 19, 2023 · US
Process to convert reduced sulfur species and water into hydrogen and sulfuric acid
US-2022411940-A1 · Dec 29, 2022 · US
Process for the removal of particulate matter from an aqueous stream
US-2022401863-A1 · Dec 22, 2022 · US
A process for increasing the concentration of sulfuric acid and equipment for use in the process
US-2022219983-A1 · Jul 14, 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
Reduction of content of carboxylic acids and derivatives thereof in oleum, disulfuric acid or concentrated sulfuric acid
US-11111201-B2 · Sep 7, 2021 · US
Reduction of content of carboxylic acids and derivatives thereof in oleum, disulfuric acid or concentrated sulfuric acid
US-2020223778-A1 · Jul 16, 2020 · US
Process for the production of sulfur trioxide
US-10640376-B2 · May 5, 2020 · US
A process for increasing the concentration of sulfuric acid and equipment for use in the process
US-2020062594-A1 · Feb 27, 2020 · US
Process To Convert Reduced Sulfur Species And Water Into Hydrogen And Sulfuric Acid
US-2019376191-A1 · Dec 12, 2019 · US
A process for the production of sulfur trioxide
US-2019177161-A1 · Jun 13, 2019 · US
Process and plant for the production of liquid acid
US-9849419-B2 · Dec 26, 2017 · US
Process and plant for the production of liquid acid
US-2017182457-A1 · Jun 29, 2017 · US
Method and system for producing nitrobenzene
US-9139508-B2 · Sep 22, 2015 · US