Diglycolamide derivatives for separation and recovery of rare earth elements from aqueous solutions
US-12398444-B2 · Aug 26, 2025 · US
involving a liquid-liquid extraction
involving a liquid-liquid extraction · 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 | C01F17/17 |
| Official title | involving a liquid-liquid extraction |
| Display label | involving a liquid-liquid extraction |
| 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 | 5 |
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 3 |
| 2020 | 1 |
| 2021 | 3 |
| 2022 | 6 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems and methods for separating yttrium and strontium
US-12371338-B2 · Jul 29, 2025 · US
Task-specific ionic liquids for selective separation and recovery of rare earth elements
US-2024076195-A1 · Mar 7, 2024 · US
Task-specific ionic liquids for selective separation and recovery of rare earth elements
US-11845670-B2 · Dec 19, 2023 · US
Materials derived from coal using environmentally friendly solvents
US-11761058-B2 · Sep 19, 2023 · US
Supercritical fluid-enhanced selective extraction of rare earth elements
US-2023249100-A1 · Aug 10, 2023 · US
Materials derived from coal using environmentally friendly solvents
US-2022372595-A1 · Nov 24, 2022 · US
Task-specific ionic liquids for selective separation and recovery of rare earth elements
US-2022212945-A1 · Jul 7, 2022 · US
Separation of Radiometals
US-2022118379-A1 · Apr 21, 2022 · US
Methods for separation and recovery of rare earth elements from aqueous solutions using diglycolamide derivatives
US-2022002840-A1 · Jan 6, 2022 · US
Diglycolamide derivatives for separation and recovery of rare earth elements from aqueous solutions
US-2022002229-A1 · Jan 6, 2022 · US
Method for recovering scandium
US-11214849-B2 · Jan 4, 2022 · US
Method for recovering scandium
US-2021254193-A1 · Aug 19, 2021 · US
Separating rare earth metal oxalates
US-11090579-B2 · Aug 17, 2021 · US
Systems and Methods for Separating Yttrium and Strontium
US-2021238051-A1 · Aug 5, 2021 · US
Method of recovering metal compounds from solid oxide fuel cell scrap
US-10651479-B2 · May 12, 2020 · US
Processes for selective recovery of rare earth metals present in acidic aqueous phases resulting from the treatment of spent or scrapped permanent magnets
US-10464819-B2 · Nov 5, 2019 · US
Method of recovering metal compounds from solid oxide fuel cell scrap
US-2019245216-A1 · Aug 8, 2019 · US
Separating rare earth metal oxalates
US-2019160394-A1 · May 30, 2019 · US
Materials derived from coal using environmentally friendly solvents
US-2018187289-A1 · Jul 5, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01F17/17?
- CPC C01F17/17 is the Cooperative Patent Classification code for “involving a liquid-liquid extraction.”
- How many patents are filed under CPC C01F17/17 (involving a liquid-liquid extraction)?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC C01F17/17 growing?
- Publication counts under this code: 1 in 2024 vs 2 in 2025 (latest complete years).