Task-specific ionic liquids for selective separation and recovery of rare earth elements
US-2024076195-A1 · Mar 7, 2024 · US
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Quaternary ammonium
Quaternary ammonium · 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 | C22B3/288 |
| Official title | {Quaternary ammonium} |
| Display label | Quaternary ammonium |
| Total patents | 8 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2019 | 1 |
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Task-specific ionic liquids for selective separation and recovery of rare earth elements
US-11845670-B2 · Dec 19, 2023 · US
Process for removing cyanide from a cyanide-bearing aqueous fluid
US-2023399241-A1 · Dec 14, 2023 · US
Separation of rare earth metals
US-2023059863-A1 · Feb 23, 2023 · US
Extracting rare earth metal from acidic solution by contacting with ionic liquid composition
US-11396684-B2 · Jul 26, 2022 · US
Task-specific ionic liquids for selective separation and recovery of rare earth elements
US-2022212945-A1 · Jul 7, 2022 · US
Lipophilic guanidinium compounds for removal of oxyanions from aqueous solutions
US-11001554-B2 · May 11, 2021 · US
Lipophilic guanidinium compounds for removal of oxyanions from aqueous solutions
US-2019299124-A1 · Oct 3, 2019 · US