Method for recovering active metal of lithium secondary battery
US-12545974-B2 · Feb 10, 2026 · US
Carboxylic acids
Carboxylic acids · 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 | C22B3/32 |
| Official title | Carboxylic acids |
| Display label | Carboxylic acids |
| Total patents | 49 |
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 | 1 |
| 2016 | 6 |
| 2017 | 1 |
| 2018 | 5 |
| 2019 | 5 |
| 2020 | 1 |
| 2021 | 2 |
| 2022 | 5 |
| 2023 | 7 |
| 2024 | 6 |
| 2025 | 9 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods and compositions to recover rare earth elements from organic solutions
US-2025369073-A1 · Dec 4, 2025 · US
Method for lithium recovery by extraction-stripping separation and purification
US-12480179-B2 · Nov 25, 2025 · US
Method for producing beryllium solution, method for producing beryllium, method for producing beryllium hydroxide, method for producing beryllium oxide, and beryllium oxide
US-12467115-B2 · Nov 11, 2025 · US
Method for reducing waste by recovering transition metals from lithium secondary battery
US-12451533-B2 · Oct 21, 2025 · US
Diglycolamide derivatives for separation and recovery of rare earth elements from aqueous solutions
US-12398444-B2 · Aug 26, 2025 · US
Metal extractant and separation recovery method of metal ions using metal extractant
US-2025243560-A1 · Jul 31, 2025 · US
Separation recovery method of metal ions and acidic metal extractant
US-2025201957-A1 · Jun 19, 2025 · US
Synthesis of diglycolamides
US-2025197345-A1 · Jun 19, 2025 · US
Method of extracting metal from salt solution derived from spent battery
US-2025149669-A1 · May 8, 2025 · US
Efficient recycling of e-waste by energy landscape inversion
US-2024425948-A1 · Dec 26, 2024 · US
Cyclic amine monoamides for extracting uranium(vi) and plutonium(iv) and for separating them without reducing plutonium(iv)
US-2024410034-A1 · Dec 12, 2024 · US
Method of recovering transition metal
US-2024243380-A1 · Jul 18, 2024 · US
Method for Processing Lithium Ion Battery Waste
US-2024047776-A1 · Feb 8, 2024 · US
Method for reducing waste by recovering transition metals from lithium secondary battery
US-2024030510-A1 · Jan 25, 2024 · US
Methods of obtaining water for downstream processes
US-2024010525-A1 · Jan 11, 2024 · US
Method for preparing pretreated product for recovering valuable metals of lithium secondary battery
US-2023420761-A1 · Dec 28, 2023 · US
Method for producing mixed metal salt
US-2023312369-A1 · Oct 5, 2023 · US
Method for recovering active metal of lithium secondary battery
US-2023250507-A1 · Aug 10, 2023 · US
Methods for extracting Li and Ni from a solution
US-11713494-B2 · Aug 1, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C22B3/32?
- CPC C22B3/32 is the Cooperative Patent Classification code for “Carboxylic acids.”
- How many patents are filed under CPC C22B3/32 (Carboxylic acids)?
- Our database includes 49 publications tagged with this CPC code.
- Is patent activity under CPC C22B3/32 growing?
- Publication counts under this code: 6 in 2024 vs 9 in 2025 (latest complete years).