Sodium sulfate by-product processing in lithium and battery chemical production
US-12522510-B2 · Jan 13, 2026 · 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 | C01D1/04 |
| Official title | Hydroxides |
| Display label | Hydroxides |
| Total patents | 63 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 7 |
| 2018 | 8 |
| 2019 | 7 |
| 2020 | 4 |
| 2021 | 8 |
| 2022 | 7 |
| 2023 | 7 |
| 2024 | 2 |
| 2025 | 4 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for recovering active metal of lithium secondary battery
US-12519150-B2 · Jan 6, 2026 · US
Method for extracting lithium from lithium-containing material
US-2025388994-A1 · Dec 25, 2025 · US
Method and apparatus for sodium slag recovery
US-12392013-B2 · Aug 19, 2025 · US
Thermal decomposition of sodium formate and sodium oxalate using super-heated steam from nuclear reactor system for direct in-situ methanol production
US-2025243139-A1 · Jul 31, 2025 · US
Sodium Formate Hydrogen Extraction System Operation And Production Of Hydrogen And Methanol
US-2025167271-A1 · May 22, 2025 · US
Processing hard rock lithium minerals or other materials to produce lithium materials and byproducts converted from a sodium sulfate intermediate product
US-2024425381-A1 · Dec 26, 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
PROCESS FOR THE RECOVERY OF HIGH PURITY Metallic SODIUM AND THE SAFE TREATMENT OF HIGH CALCIUM CONTENT SODIUM SLAG
US-2023332270-A1 · Oct 19, 2023 · US
Method and apparatus for sodium slag recovery
US-2023332271-A1 · Oct 19, 2023 · US
Dilution solution for measuring free steroids in blood and method for measuring steroid using the same
US-2023314292-A1 · Oct 5, 2023 · US
Methods of reducing color in alkanolamine compositions and compositions produced thereby
US-11702382-B2 · Jul 18, 2023 · US
Process and installation for the destruction of radioactive sodium
US-2023139794-A1 · May 4, 2023 · US
Sodium sulfate by-product processing in lithium and battery chemical production
US-2023052881-A1 · Feb 16, 2023 · US
Process and installation for the destruction of radioactive sodium
US-2023049409-A1 · Feb 16, 2023 · US
Synthetic caustic composition
US-11407647-B2 · Aug 9, 2022 · US
Flowable slush of frozen particles for ice pigging
US-2022241826-A1 · Aug 4, 2022 · US
Nitrate process for manufacturing transition metal hydroxide precursors
US-11401167-B2 · Aug 2, 2022 · US
Dual ligand sol-gel sorbent combining superhydrophobicity and Π-Π interaction
US-11344862-B1 · May 31, 2022 · US
Synthetic caustic composition
US-11267718-B2 · Mar 8, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01D1/04?
- CPC C01D1/04 is the Cooperative Patent Classification code for “Hydroxides.”
- How many patents are filed under CPC C01D1/04 (Hydroxides)?
- Our database includes 63 publications tagged with this CPC code.
- Is patent activity under CPC C01D1/04 growing?
- Publication counts under this code: 2 in 2024 vs 4 in 2025 (latest complete years).