Hydrometallurgical Precious Metal Recovery Patents
Filing peaked in 2021 at 177 records and had fallen 59% to 73 by 2024, the last year with complete published data. Filings ran from 117 in 2017 to a peak of 177 in 2021, then fell to 73 by 2024 — a 59% decline over that three-year span. 2025 and 2026 figures are still incomplete because publication lags filing by roughly 18 months, so the most recent bars will keep filling in rather than confirming a continued drop.
- 1FREEPORT MCMORAN INC2.8%
- 2PLACER DOME TECHN SERVICES2.7%
- 3BARRICK GOLD CORPORATION2.6%
- 4JX NIPPON MINING & METALS CORP2.2%
- 5OUTOTEC FINDLAND OY2.2%
See the full hydrometallurgical precious metal recovery analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions on this field
What counts as hydrometallurgical precious metal recovery in patent terms?
It covers processes that dissolve precious metals out of ores, concentrates or waste materials using aqueous chemistry rather than smelting — leaching, solvent extraction, selective precipitation and effluent treatment are the core mechanisms captured in this dataset. The IPC classes involved are dominated by C22B (metal extraction and refining), with supporting classes in separation processes, electrolytic recovery and flotation. Most filings combine a leaching or extraction step with a downstream separation or recovery step in the same claim set.
Why has patent filing in this field declined since 2021?
Filings peaked at 177 in 2021 and had fallen to 73 by 2024, a 59% drop over that span, based on the confirmed data. This should not be read as the technology losing relevance — commodity price cycles, permitting timelines and capital spending in mining tend to move filing volume with a lag. The 2025 and 2026 figures in any chart are still incomplete because publication trails filing by roughly 18 months, so a further apparent drop in those years is an artifact of the data cut-off, not a confirmed trend.
Who are the leading patent holders in hydrometallurgical gold and precious metal recovery?
The ranking in this dataset covers 100 companies counted by patent family, with the leader holding 99 records and the field showing real concentration at the top — the top 5 combined account for 12.6% of all 3,481 records in scope, and the top 10 combined for 21.9%. Beyond that, the ranking thins into a long tail of single- or few-filing entrants. Recent-year momentum data shows several historically prominent assignees with zero filings in the latest year, which is consistent with the broader 2021-to-2024 pullback rather than any single company exiting the field.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Hydrometallurgical Precious Metal Recovery covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.