Separation of rare earth elements
US-12584193-B2 · Mar 24, 2026 · US
Aliphatic amines
Aliphatic amines · 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 | C22B3/282 |
| Official title | {Aliphatic amines} |
| Display label | Aliphatic amines |
| Total patents | 26 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 5 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 5 |
| 2023 | 1 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for selectively capturing chemical elements from a polymetallic sample
US-2026055006-A1 · Feb 26, 2026 · US
Separation of rare earth elements
US-2025305091-A1 · Oct 2, 2025 · US
Diglycolamide derivatives for separation and recovery of rare earth elements from aqueous solutions
US-12398444-B2 · Aug 26, 2025 · US
Platinum-group metal recovery agent and platinum-group metal recovery method
US-2025162976-A1 · May 22, 2025 · US
Separation of rare earth elements
US-2023227942-A1 · Jul 20, 2023 · US
Extractant for rare earth extraction from aqueous phosphoric acid solutions and method of extraction
US-11466341-B2 · Oct 11, 2022 · US
Extraction of selected platinum-group metals from supported catalyst
US-11427887-B2 · Aug 30, 2022 · US
Methods for simultaneous leaching and extraction of precious metals
US-11427886-B2 · Aug 30, 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 separating nickel and cobalt from a solution
US-11008638-B2 · May 18, 2021 · US
Lipophilic guanidinium compounds for removal of oxyanions from aqueous solutions
US-11001554-B2 · May 11, 2021 · US
Method of recovering metal compounds from solid oxide fuel cell scrap
US-10651479-B2 · May 12, 2020 · US
Method for separating nickel and cobalt from a solution
US-2020115773-A1 · Apr 16, 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
Lipophilic guanidinium compounds for removal of oxyanions from aqueous solutions
US-2019299124-A1 · Oct 3, 2019 · US
Method of recovering metal compounds from solid oxide fuel cell scrap
US-2019245216-A1 · Aug 8, 2019 · US
New extractant, useful for extracting rare earths from an aqueous phosphoric acid solution, and the applications thereof
US-2019218643-A1 · Jul 18, 2019 · US
Extraction of selected platinum-group metals from supported catalyst
US-2019161824-A1 · May 30, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C22B3/282?
- CPC C22B3/282 is the Cooperative Patent Classification code for “Aliphatic amines.”
- How many patents are filed under CPC C22B3/282 (Aliphatic amines)?
- Our database includes 26 publications tagged with this CPC code.
- Is patent activity under CPC C22B3/282 growing?
- Publication counts under this code: 1 in 2023 vs 3 in 2025 (latest complete years).