Microbial-assisted heap leaching
US-12577634-B2 · Mar 17, 2026 · US
with leaching with acids
with leaching with acids · 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 | C22B19/22 |
| Official title | {with leaching with acids} |
| Display label | with leaching with acids |
| Total patents | 26 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 5 |
| 2025 | 1 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for producing nickel sulfate
US-2026055007-A1 · Feb 26, 2026 · US
Microbial-assisted heap leaching
US-2026035764-A1 · Feb 5, 2026 · US
Hydrometallurgical process for waste materials of the zinc and steel industries
US-2025034677-A1 · Jan 30, 2025 · US
Process for recovering non-ferrous metals from industrial mineral residues
US-12157928-B2 · Dec 3, 2024 · US
Method for the treatment of iron-containing sludge
US-12054804-B2 · Aug 6, 2024 · US
Metal and tin alloy having low alpha-ray emission, and method for producing same
US-12000020-B2 · Jun 4, 2024 · US
Autoclave and pressure oxidation method
US-2024110258-A1 · Apr 4, 2024 · US
Microbial-assisted Heap Leaching
US-2024035113-A1 · Feb 1, 2024 · US
Metal and tin alloy having low alpha-ray emission, and method for producing same
US-2023085708-A1 · Mar 23, 2023 · US
Method for treating alloy
US-2023071697-A1 · Mar 9, 2023 · US
Method for the treatment of iron-containing sludge
US-11519053-B2 · Dec 6, 2022 · US
Method for preparing iron ore concentrates by recycling copper slag tailings
US-11293076-B2 · Apr 5, 2022 · US
Method for the treatment of iron-containing sludge
US-2021371953-A1 · Dec 2, 2021 · US
Process for recovering non-ferrous metals from industrial mineral residues
US-2021292869-A1 · Sep 23, 2021 · US
Method for preparing iron ore concentrates by recycling copper slag tailings
US-2020332390-A1 · Oct 22, 2020 · US
Method of ore processing using mixture including acidic leach solution and oxidizing agent
US-10662503-B2 · May 26, 2020 · US
Method for the Treatment of Iron-Containing Sludge
US-2019177815-A1 · Jun 13, 2019 · US
Method for recovery of copper and zinc
US-10221493-B2 · Mar 5, 2019 · US
Decoating of coated materials
US-10087502-B2 · Oct 2, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C22B19/22?
- CPC C22B19/22 is the Cooperative Patent Classification code for “with leaching with acids.”
- How many patents are filed under CPC C22B19/22 (with leaching with acids)?
- Our database includes 26 publications tagged with this CPC code.
- Is patent activity under CPC C22B19/22 growing?
- Publication counts under this code: 5 in 2024 vs 1 in 2025 (latest complete years).