Electrochemical extraction of target cations from complex resources
US-2025361639-A1 · Nov 27, 2025 · US
Hydroxides
Hydroxides · 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 | C25B1/20 |
| Official title | Hydroxides |
| Display label | Hydroxides |
| Total patents | 52 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 3 |
| 2023 | 6 |
| 2024 | 11 |
| 2025 | 10 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Basic electrocatalyst for carbon dioxide reduction and ethylene production, electrode and apparatus each including the same, and method of manufacturing the electrode
US-12480218-B2 · Nov 25, 2025 · US
Seawater electrolysis enables mg(oh)2 production and co2 mineralization
US-2025313966-A1 · Oct 9, 2025 · US
Calcium hydroxide precipitation in an electrolytic reactor with hydrodynamic separation
US-2025263847-A1 · Aug 21, 2025 · US
Method for continuous monitoring of extraction process
US-2025235800-A1 · Jul 24, 2025 · US
Seawater electrolysis enables Mg(OH)2 production and CO2 mineralization
US-12359323-B2 · Jul 15, 2025 · US
Electrochemical carbon removal from water via carbon mineralization
US-2025178933-A1 · Jun 5, 2025 · US
Electrolyzers
US-2025171912-A1 · May 29, 2025 · US
Electrolyzers and use of the same for carbon dioxide capture and mining
US-2025161880-A1 · May 22, 2025 · US
Methods and apparatus for converting metal carbonate salts to metal hydroxides
US-2025101602-A1 · Mar 27, 2025 · US
Process for the recovery of lithium
US-2024384371-A1 · Nov 21, 2024 · US
Process for the recovery of lithium
US-2024384370-A1 · Nov 21, 2024 · US
Seawater electrolysis enables mg(oh)2 production and co2 mineralization
US-2024360567-A1 · Oct 31, 2024 · US
Two Electrode Electrochemical Purification Cell for Molten Salt
US-2024240331-A1 · Jul 18, 2024 · US
System and method for CO2 capture and electroregeneration and synchronous conversion
US-12031222-B2 · Jul 9, 2024 · US
Sulfuric acid production with mineral carbon sequestration
US-2024149240-A1 · May 9, 2024 · US
Method for producing alkali metal/alkaline earth metal hydroxide and application of said production method to carboxylate waste recycling technology
US-2024124986-A1 · Apr 18, 2024 · US
System and method for co2 capture and electroregeneration and synchronous conversion
US-2024084463-A1 · Mar 14, 2024 · US
Seawater electrolysis enables Mg(OH)2 production and CO2 mineralization
US-11920246-B2 · Mar 5, 2024 · US
Electrolyzers
US-2024035172-A1 · Feb 1, 2024 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C25B1/20?
- CPC C25B1/20 is the Cooperative Patent Classification code for “Hydroxides.”
- How many patents are filed under CPC C25B1/20 (Hydroxides)?
- Our database includes 52 publications tagged with this CPC code.
- Is patent activity under CPC C25B1/20 growing?
- Publication counts under this code: 11 in 2024 vs 10 in 2025 (latest complete years).