Method of selectively removing aluminum from waste electrode and a method of removing metal components from the waste electrode using the method
US-12586834-B2 · Mar 24, 2026 · US
Nitric acids or salts thereof
Nitric acids or salts thereof · 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 | C22B23/0438 |
| Official title | {Nitric acids or salts thereof} |
| Display label | Nitric acids or salts thereof |
| Total patents | 30 |
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 |
| 2016 | 2 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 4 |
| 2022 | 3 |
| 2023 | 6 |
| 2024 | 6 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for recovering transition metals from lithium secondary batteries
US-2026042132-A1 · Feb 12, 2026 · US
Method for reducing waste by recovering transition metals from lithium secondary battery
US-12451533-B2 · Oct 21, 2025 · US
Method and apparatus for recycling lithium-ion batteries
US-2025273760-A1 · Aug 28, 2025 · US
Method and apparatus for recycling lithium-ion batteries
US-12322769-B2 · Jun 3, 2025 · US
Charge material for recycled lithium-ion batteries
US-2024413421-A1 · Dec 12, 2024 · US
Charge material for recycled lithium-ion batteries
US-12074302-B2 · Aug 27, 2024 · US
Method and apparatus for recycling lithium-ion batteries
US-12046725-B2 · Jul 23, 2024 · US
Method And Apparatus For Recycling Lithium-Ion Batteries
US-2024204279-A1 · Jun 20, 2024 · US
Charge material for recycled lithium-ion batteries
US-11955613-B2 · Apr 9, 2024 · US
Method for reducing waste by recovering transition metals from lithium secondary battery
US-2024030510-A1 · Jan 25, 2024 · US
Atomization device, manufacturing method of metal powder, and manufacturing method of valuable metal
US-2023321722-A1 · Oct 12, 2023 · US
Method and apparatus for recycling lithium-ion batteries
US-11769916-B2 · Sep 26, 2023 · US
Method And Apparatus For Recycling Lithium-Ion Batteries
US-2023198040-A1 · Jun 22, 2023 · US
Method of selectively removing aluminum from waste electrode and a method of removing metal components from the waste electrode using the method
US-2023099073-A1 · Mar 30, 2023 · US
Method for anaerobically cracking power battery
US-11591525-B2 · Feb 28, 2023 · US
Method and apparatus for recycling lithium-ion batteries
US-2023044374-A1 · Feb 9, 2023 · US
Method and apparatus for recycling lithium-ion batteries
US-11502345-B2 · Nov 15, 2022 · US
Charge material for recycled lithium-ion batteries
US-2022311068-A1 · Sep 29, 2022 · US
Method and apparatus for recycling lithium-ion batteries
US-2022131204-A1 · Apr 28, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C22B23/0438?
- CPC C22B23/0438 is the Cooperative Patent Classification code for “Nitric acids or salts thereof.”
- How many patents are filed under CPC C22B23/0438 (Nitric acids or salts thereof)?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC C22B23/0438 growing?
- Publication counts under this code: 6 in 2024 vs 3 in 2025 (latest complete years).