Mineral Processing Patents: Leaders, Trends & White Space 2026
- Concentrated but not locked up. the top 5 assignees hold 24.1% of all 2,863 records in scope, and the top 10 hold 32.5% — leadership exists, but well over half the field sits outside it.
- Filing cooled after a 2021 peak. annual filings hit 199 in 2021, the high point of the window, then fell to 125 by 2024 — a documented 37% decline over that three-year span.
- Metal extraction dominates the claim map. C22B (metal extraction & refining) appears in 44.1% of records, more than two and a half times the next largest class, flotation at 16.7%.
Filing growth compares 2021 (199 records) with 2024 (125) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 2,863 records in scope (CR5), not by the ranked leaders only.
What this dataset covers
This landscape draws on 2,863 published records filed or published between 2015 and the 2026 data cut-off, matched on mineral processing and beneficiation terminology combined with ore composition, metal recovery, separation reagent, process residue, ore processing and separation circuit language. The scope spans the full chain from crushing and flotation through to metal extraction and water treatment associated with ore processing. Patent families, not raw document counts, are the fairer unit for judging real filing activity, since families neutralise continuation practice and multi-jurisdiction duplication.
Filing activity built steadily from 2017, peaked in 2021, and has since declined through the last complete year of data. Because publication typically lags filing by roughly 18 months, the most recent one to two years in any trend chart will understate true filing volume and should not be read as a sign the field is shrinking.
Filing trends and technology composition
Two views of the same 2,863 records: how filing volume has moved year over year, and which IPC subclasses carry the claim density.
Filing trend, 2017–2026
Filings rose from 96 in 2017 to a peak of 199 in 2021, then fell to 125 by 2024, a documented -37% move over that three-year span. 2025 and 2026 figures are still filling in due to publication lag and should not yet be read as continued decline.
IPC subclass composition
C22B (metal extraction & refining) covers 44.1% of the 2,863 records, the single largest concentration in the field. Flotation (B03D, 16.7%) and water/wastewater treatment (C02F, 15.4%) follow as the next-largest clusters, with crushing/grinding and solid waste disposal each under 6% — a signal that comminution and residue-handling claims are comparatively thin.
Shares are the percentage of the 2,863 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Mineral Processing & Beneficiation Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about mineral processing & beneficiation patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative and most-cited filings
US6234318B1 — Flotation and cyanidation process control
A method for controlling a froth flotation system in a mineral processing operation for recovering metal from a metal source. A rule-based expert system adjusts performance of the froth flotation system.Filed by Barrick Gold Corporation, published 2001-05-22 — a control-layer patent rather than a reagent or circuit-design claim.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20160045841A1 | New and improved system for processing various chemicals and materials | 860 |
| 2 | US7722843B1 | System and method for sequestration and separation of mercury in combustion exhaust gas aqueous scrubber syst… | 259 |
| 3 | WO2014153570A2 | New and improved system for processing various chemicals and materials | 219 |
| 4 | US5232490A | Oxidation/reduction process for recovery of precious metals from MnO2 ores, sulfidic ores and carbonaceous ma… | 108 |
| 5 | US4644020A | Production of high molecular weight vinyl lactam polymers and copolymers | 88 |
| 6 | US20110182786A1 | Hydrometallurgical process and method for recovering metals | 87 |
| 7 | US4256706A | Leaching agglomerated gold – silver ores | 87 |
| 8 | US4378275A | Metal sulphide extraction | 81 |
| 9 | US7004326B1 | Arsenide depression in flotation of multi-sulfide minerals | 80 |
| 10 | US20210156810A1 | Systems and methods for monitoring slope stability | 67 |
Citation counts favour older records simply because they have had longer to accumulate citations inside the searched corpus — treat this as a signal of influence, not of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Put your own technology through the same analysis
Eureka on the web
When you want the answer in the next five minutes.
The agent works the prompt against patents and technical literature, citing every source.
Run your analysis now →MCP server & REST API
When it has to run inside your own pipeline.
Patent search, landscape analysis and assignee resolution as MCP tools. Drop them into any agent framework, or call REST directly.
Browse MCP servers →What the data means for filing strategy
Four read-outs from the concentration, trend and citation figures above.
Leadership exists but is not exclusive
The top 5 assignees combine for 24.1% of all records in scope, and the top 10 reach 32.5%. That leaves more than two-thirds of the field held by the long tail of the 100 ranked assignees plus unranked filers — room for new entrants to build position without displacing an incumbent.
Filing has pulled back from its 2021 peak
Annual filings peaked at 199 in 2021 and had fallen to 125 by 2024, a documented -37% move. Recent-year assignee momentum data shows several leading filers dropping to zero or near-zero output in the latest year, though publication lag means the very latest years are still incomplete.
Extraction and refining dominate the claim map
C22B alone covers 44.1% of the 2,863 records, well ahead of flotation (16.7%) and water treatment (15.4%). Crushing/grinding (5.1%) and solid waste disposal (4.8%) are comparatively under-claimed relative to their role in the processing chain.
Influence skews toward older filings
The most-cited record in the dataset, a chemicals-and-materials processing system, carries 860 citations — several times the next entries. High citation counts here mark documents that shaped later filing language, not necessarily technology still active today.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to mineral processing & beneficiation patent landscape, with the prior art for and against each one.
Who is filing, and where the gaps sit
The ranked leaders combine established mining majors with process-technology and chemicals firms; recent-year momentum data shows most of them pulling back from peak filing rates.
A single filer sets the pace
The leading assignee holds 214 records against a fifth-place figure of 57 and a tenth-place figure of 39 — a steep drop-off after the top position that flattens quickly through the rest of the ranked leaders.
Even top filers are pulling back
Recent-year momentum figures show several previously active assignees filing at 0 or 2 records in the latest year, with year-over-year drops as steep as -94% and -100% among named leaders. This is consistent with the broader post-2021 trend rather than isolated to one company.
Co-filing is limited and mostly internal
Only 10 co-assignee pairs appear in the dataset, and the strongest by volume link a parent company to its own regional services subsidiary or to named individual inventors, rather than pairing independent companies. Cross-company joint filing is not a visible pattern here.
| Assignee | Recent year | YoY |
|---|---|---|
| Carbon Technology Holdings LLC | 2 | -67% |
| Freeport-McMoRan Inc | 2 | -94% |
| BASF SE | 0 | — |
| Phelps Dodge Corporation | 0 | — |
| Anglo Corp Services South Africa (Pty) Ltd | 0 | -100% |
| Molycorp Minerals LLC | 0 | — |
| Dow Global Technologies LLC | 0 | — |
| Mint Innovation Ltd | 0 | -100% |
Where to take this analysis
The figures above set the boundaries of the field. The next step is usually narrower: checking a specific claim, a specific competitor, or a specific gap.
Check freedom-to-operate against a specific claim
Run a targeted claim comparison against filings like US6234318B1 before committing engineering resources to flotation control logic.
Explore in Eureka →Track a named assignee's filing momentum
Recent-year YoY swings as steep as -94% suggest some leaders are shifting priorities — worth confirming before assuming continued activity.
Explore in Eureka →Map the under-claimed branches in detail
Comminution control and residue re-processing show thinner IPC density than the field's core — validate whether that reflects true white space or just classification gaps.
Explore in Eureka →Common questions on mineral processing patents
One assignee leads the ranked field with 214 records, well ahead of the fifth-ranked filer at 57 and the tenth-ranked filer at 39. The top 5 assignees together account for 24.1% of all 2,863 records in scope, and the top 10 account for 32.5%. That still leaves the large majority of filings spread across the remaining ranked assignees and unranked entrants, so leadership in this field is real but not exclusionary.
Filings rose from 96 in 2017 to a peak of 199 in 2021, then declined to 125 by 2024 — a documented 37% drop over that three-year span. Data for 2025 and 2026 is still incomplete because publication typically lags filing by around 18 months, so the apparent recent decline should not be read as the field's final trajectory. The 2021 peak to 2024 comparison is the most reliable growth signal currently available.
Metal extraction and refining (IPC class C22B) is by far the largest category, appearing in 44.1% of the 2,863 records in scope. Flotation (B03D, 16.7%) and water/wastewater treatment (C02F, 15.4%) form the next tier. Crushing and grinding (B02C, 5.1%) and solid waste disposal (B09B, 4.8%) carry comparatively little claim density despite being integral to the processing chain, which is one reason they stand out as areas with more open claim space.
US6234318B1, assigned to Barrick Gold Corporation and published in 2001, covers a rule-based expert system that adjusts froth flotation system performance as part of controlling a mineral processing operation. It is a control-layer patent focused on flotation and cyanidation process control rather than a reagent chemistry or circuit-design claim. Anyone building automated flotation control logic should review its specific claim language, but it does not by itself block reagent formulation work or non-expert-system control approaches.
Based on IPC composition, crushing/grinding (5.1% of records) and solid waste disposal (4.8%) carry noticeably less claim density than core extraction and flotation categories, despite being essential steps in most processing flows. Areas such as comminution circuit control, tailings valorisation, and integration between water treatment and extraction circuits show thinner coverage relative to the size of the overall field. These are worth validating with a targeted freedom-to-operate search before assuming they are genuinely open.
Research Mineral Processing & Beneficiation Patent Landscape in depth with Eureka
Go past this page: query the whole mineral processing & beneficiation patent landscape corpus yourself, in your own scope.
Every answer comes back with patent numbers you can open.
Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.