Sinter and Pellet Quality Testing Patents: Leaders & Trends 2026
Sinter and Pellet Quality Testing Patents: Who Leads and Where the Field Is Concentrated
Concentrated at the top. The top 5 assignees account for 126 of 191 records in scope (66.0%), and the top 10 reach 88.0% — a short list of filers effectively sets the terms in this field. Filings rose to a peak of 40 records in 2020, then declined — 24 in 2021 down to 11 in 2024, a -54% move over that three-year span. 2025 and 2026 counts (3 in 2026 so far) are undercounts: publication typically lags filing by around 18 months, so the most recent years will fill in as more records publish.
- 1TATA CONSULTANCY SERVICES LTD47
- 2TATA STEEL LTD35
- 3JSW STEEL LTD20
- 4LHOIST RECH & DEV SA14
- 5JFE STEEL CORP10
See the full sinter and pellet quality testing 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 this landscape
Who are the leading patent holders in sinter and pellet quality testing?
The dataset ranks 23 assignees, and filings concentrate heavily at the top: the leading assignee holds 47 of 191 records, and the top 5 combined account for 66.0% of all records in scope. Rather than list individual names here, treat the top 5 and top 10 concentration figures (66.0% and 88.0% respectively) as the signal that this field is led by a small number of integrated steelmakers and their research partners rather than a broad field of independent filers. Anyone entering this space should expect to encounter prior art from that concentrated group first.
Is patent filing activity in this field growing or shrinking?
Filing peaked at 40 records in 2020 and has declined since, falling from 24 records in 2021 to 11 in 2024, a -54% change over that span. However, publication typically lags filing by about 18 months, so 2025 and 2026 figures (3 records so far in 2026) are still incomplete and should not be read as continued decline. The most reliable read is that activity cooled after 2020, with the true 2025-2026 trajectory not yet visible in published data.
What patent classes cover sinter and pellet quality testing methods?
The dominant class is C22B (metal extraction & refining), appearing in 50.8% of the 191 records, reflecting the core focus on ironmaking-related agglomerate quality. C04B (ceramics, cement & refractories, 14.1%) and G05B (control & regulating systems, 12.0%) follow, with C21B (blast furnace iron production, 9.4%) and B01J (chemical/physical processes, 8.4%) also well represented. Because records often carry multiple IPC classes, these percentages are each measured against the same 191-record total and naturally sum to more than 100%.
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 Sinter and Pellet Quality Testing 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.