Leaching Method
US-2025092488-A1 · Mar 20, 2025 · US
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with amines (amino acids C22B3/165)
with amines (amino acids C22B3/165) · 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 | C22B3/1625 |
| Official title | {with amines (amino acids C22B3/165)} |
| Display label | with amines (amino acids C22B3/165) |
| Total patents | 10 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2018 | 2 |
| 2019 | 3 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
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
Leaching aids and methods of using leaching aids
US-2021381079-A1 · Dec 9, 2021 · US
Leaching copper-containing ores
US-10563284-B2 · Feb 18, 2020 · US
Leaching Copper-Containing Ores
US-2019345581-A1 · Nov 14, 2019 · US
Leaching Copper-Containing Ores
US-2019345580-A1 · Nov 14, 2019 · US
Extraction of selected platinum-group metals from supported catalyst
US-2019161824-A1 · May 30, 2019 · US
Methods for simultaneous leaching and extraction of precious metals
US-2018142322-A1 · May 24, 2018 · US
Methods for selective leaching and extraction of precious metals in organic solvents
US-2018112289-A1 · Apr 26, 2018 · US