Coke Quality Patents: Who Leads, Where the Gaps Are 2026
Coke Quality and Blast Furnace Performance Patents: Who Leads and Where the Gaps Are
Filing peaked in 2017 at 22 records and has not returned to that level since, with 2021's 6 filings falling to 2 by 2024 — a 67% drop across that span. Filings hit 22 in 2017, the peak across the covered window, then declined through subsequent years. Using 2021 to 2024 as the last complete comparison, filings fell from 6 to 2 — a 67% drop. 2025 and later are still incomplete due to publication lag and should not be read as continued decline.
- 1JFE STEEL CORP22
- 2PAUL WURTH SA20
- 3SUNCOKE TECH & DEV LLC19
- 4EKOMATTER IP HLDG 1 LLC10
- 5TATA STEEL LTD9
See the full coke quality and blast furnace performance 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 landscape
Who are the leading patent filers in coke quality and blast furnace technology?
The ranking covers 46 assignees across 174 published records, with the leader holding 22 records — well ahead of fifth place at 9 and tenth place at 5. The field includes integrated steelmakers, coking process technology firms and public research institutes. The top 5 combined account for 46.0% of all records, and the top 10 combined reach 66.1%, so leadership is concentrated but a substantial long tail of smaller filers remains active.
Is patent filing in this field growing or shrinking?
Filing peaked in 2017 at 22 records and has declined since; comparing the last two complete years available, 2021’s 6 filings dropped to 2 by 2024, a 67% fall. However, patent publication typically lags filing by around 18 months, so 2025 and 2026 figures are still incomplete and should not be read as evidence of an ongoing collapse. The honest read is a step down from a 2017 peak rather than a currently accelerating decline.
What does CA2972887C actually cover?
CA2972887C, assigned to SunCoke Technology and Development LLC and granted in 2022, claims a multi-modal bed of coking material formed by combining two particulate materials of different sizes and bulk densities. The claimed benefit is an optimized combined bulk density exceeding what a simple linear blend of the two components would predict. Anyone designing coal blend charging strategies with mixed particle sizing should review this claim’s specific scope before finalising a process.
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 Coke Quality and Blast Furnace Performance 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.