Separation of elements using polyoxometalates and cations
US-2026084973-A1 · Mar 26, 2026 · US
This page is not indexed by search engines while we improve data quality.
Obtaining refractory metals
Obtaining refractory metals · 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 | C22B34/00 |
| Official title | Obtaining refractory metals |
| Display label | Obtaining refractory metals |
| Total patents | 12 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 3 |
| 2020 | 1 |
| 2022 | 1 |
| 2023 | 2 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Separation of elements using polyoxometalates and cations
US-12479735-B2 · Nov 25, 2025 · US
Separation of elements using polyoxometalates and cations
US-2023331562-A1 · Oct 19, 2023 · US
Systems and methods for hydrometallurgical, anti-solvent, and electrochemical recovery of metals from wastes and ashes
US-2023220514-A1 · Jul 13, 2023 · US
Method for preparing high-melting-point metal powder through multi-stage deep reduction
US-11241740-B2 · Feb 8, 2022 · US
Method for preparing high-melting-point metal powder through multi-stage deep reduction
US-2020276648-A1 · Sep 3, 2020 · US
Method for separation of chemically pure Os from metal mixtures
US-10087503-B2 · Oct 2, 2018 · US
Separation method
US-10035078-B2 · Jul 31, 2018 · US
Method for processing vanadium-titanium magnetite finished ores by using wet process
US-9896742-B2 · Feb 20, 2018 · US
Method for separation of chemically pure os from metal mixtures
US-2017058381-A1 · Mar 2, 2017 · US
Method for separation of chemically pure Os from metal mixtures
US-9528169-B2 · Dec 27, 2016 · US
Method for processing vanadium-titanium magnetite finished ores by using wet process
US-2016060728-A1 · Mar 3, 2016 · US