Methods for extracting critical minerals from sedimentary rock
US-2026085381-A1 · Mar 26, 2026 · US
Sulfates; Sulfites
Sulfates; Sulfites · 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 | C01D15/06 |
| Official title | Sulfates; Sulfites |
| Display label | Sulfates; Sulfites |
| Total patents | 41 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 6 |
| 2023 | 7 |
| 2024 | 6 |
| 2025 | 3 |
| 2026 | 3 |
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-12545974-B2 · Feb 10, 2026 · US
Method of concentrating lithium-containing solutions and recovering lithium therefrom
US-12528053-B2 · Jan 20, 2026 · US
Method for producing lithium compound
US-12473201-B2 · Nov 18, 2025 · US
Method for recovering lithium from brine
US-12378638-B2 · Aug 5, 2025 · US
Cathode Active Material for Lithium Secondary Battery, Method of Preparing the Same and Lithium Secondary Battery Including the Same
US-2025079451-A1 · Mar 6, 2025 · US
Process and method for producing crystallized metal sulfates
US-2024409432-A1 · Dec 12, 2024 · US
Method of preparing lithium compound
US-12162774-B2 · Dec 10, 2024 · US
Method for producing lithium sulfate and transition metal sulfate
US-2024286912-A1 · Aug 29, 2024 · US
Process and method for producing crystallized metal sulfates
US-12054401-B2 · Aug 6, 2024 · US
Method for producing lithium-concentrated solution with high recovery rate, and method for producing lithium compound using same
US-2024208832-A1 · Jun 27, 2024 · US
Manufacturing apparatus for lithium sulfate and manufacturing method therefor
US-11932549-B2 · Mar 19, 2024 · US
Solid electrolyte
US-11855254-B2 · Dec 26, 2023 · US
Target ion recovery from earth material
US-2023392233-A1 · Dec 7, 2023 · US
Method for recovering active metal of lithium secondary battery
US-2023250507-A1 · Aug 10, 2023 · US
CATHODE ACTIVE MATERIAL FOR SULFIDE-BASED ALL-SOLID-STATE BATTERY, METHOD OF PREPARING THE SAME, CATHODE COMPLEX INCLUDING THE SAME AND METHOD OF FABRICATING the CATHODE COMPLEX
US-2023155129-A1 · May 18, 2023 · US
Method for producing lithium hydroxide
US-2023093576-A1 · Mar 23, 2023 · US
Process and apparatus for removing impurities from crystallized metal sulfates
US-2023046474-A1 · Feb 16, 2023 · US
Cobalt-free positive electrode material for lithium ion battery, preparation method therefor, and lithium ion battery
US-2023041946-A1 · Feb 9, 2023 · US
Method of concentrating lithium-containing solutions and recovering lithium therefrom
US-2022395780-A1 · Dec 15, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01D15/06?
- CPC C01D15/06 is the Cooperative Patent Classification code for “Sulfates; Sulfites.”
- How many patents are filed under CPC C01D15/06 (Sulfates; Sulfites)?
- Our database includes 41 publications tagged with this CPC code.
- Is patent activity under CPC C01D15/06 growing?
- Publication counts under this code: 6 in 2024 vs 3 in 2025 (latest complete years).