High Pressure Grinding Rolls Patents: Who Leads, Where Gaps Are 2026
High Pressure Grinding Rolls patents: concentration, momentum and open claim space
One filer holds 177 of 239 records in scope, with the top five combined reaching 93.7% of all records — this field is about as concentrated as comminution patenting gets. Filings ran from 1 record in 2017 to a peak of 45 in 2019, then declined; the tracked complete-year comparison shows 25 filings in 2021 falling to 13 in 2024, a -48% move. Treat 2025 and 2026 as undercounted rather than as evidence of further decline, since publication typically lags filing by around 18 months.
- 1METSO OUTOTEC USA INC177
- 2METSO SWEDEN AB15
- 3METABO MINERALS SWEDEN14
- 4KENNAMETAL INC14
- 5TDY INDUSTRIES INC4
See the full high pressure grinding rolls 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 about HPGR patents
Who owns the most high pressure grinding rolls patents?
One assignee holds 177 of the 239 records in scope, and together the top five assignees account for 93.7% of all records. That level of concentration means most of the core roll-construction and wear-surface claims sit with a small group of related corporate entities rather than being spread across many independent filers. Anyone assessing freedom-to-operate in this space should start with that leading portfolio before broadening the search.
Is HPGR patent filing activity growing or slowing down?
Filing peaked in 2019 at 45 records and has declined since, with the last reliable comparison showing a drop from 25 filings in 2021 to 13 in 2024, a 48% fall. However, patent publication typically lags actual filing by around 18 months, so 2025 and 2026 figures in any dataset are still incomplete and should not be read as confirming a continued slowdown. The safest read is that activity cooled off its 2019 peak through 2024, with the more recent trend still unresolved.
What technology areas do HPGR patents cover besides the roll mechanism?
The dominant IPC class is B02C (crushing, grinding and pulverising), covering 94.1% of the 239 records in scope, which confirms most filings address the grinding mechanism directly. Smaller but recurring clusters appear in B30B (presses, 9.2%), C22C (alloys, 5.0%), B22F (powder metallurgy, 4.6%) and B23P (metal working, 4.6%), reflecting roll-surface material science and construction techniques. Because a single patent can carry multiple IPC codes, these shares add up to more than 100% of the record total.
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 High Pressure Grinding Rolls 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.