Steelmaking Off Gas Energy Recovery Patents: Who Leads, Gaps 2026
Steelmaking off gas energy recovery patents: one filer dominates, filing has cooled since 2020
92.8% concentration. The top 5 assignees hold 64 of the 69 records in scope, and the top 10 account for all of them — this field has no long tail of small filers. Filings were absent in 2017, rose to a peak of 55 in 2020, then fell away — 4 in 2021 down to 0 in 2024, a -100% change over that three-year window. Treat 2025 and 2026 figures as incomplete: publication typically lags filing by around 18 months, so recent-year counts will still rise as more records publish.
- 1哈尔德杜萨公司73.9%
- 2特诺恩股份公司10.1%
- 3住友重机械工业株式会社4.3%
- 4日本制铁株式会社2.9%
- 5邢台市富爱雾化器有限公司1.4%
See the full steelmaking off gas energy 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
Frequently asked questions
Who holds the most patents in steelmaking off gas energy recovery?
One assignee dominates this dataset with 51 of the 69 records in scope, far ahead of the fifth-ranked holder at just 1 record. The ranked list covers 10 companies total, and the top 5 alone account for 92.8% of all records. This level of concentration means a single portfolio is the practical starting point for any freedom-to-operate check in this space.
Is patent filing in this field growing or slowing down?
Filing peaked at 55 records in 2020 and then declined sharply, falling from 4 in 2021 to 0 by 2024 — a -100% change over that span. However, publication typically lags actual filing by about 18 months, so the 2025 and 2026 figures in this dataset are still incomplete and should not yet be read as continued decline. The safest read is that activity cooled substantially after the 2020 peak, with the most recent trend still unresolved.
What technology areas are most claimed in this space?
C01B, covering non-metallic elements and inorganic compounds, appears in 71.0% of the 69 records, and B01D, covering separation processes such as filtration, appears in 63.8%. F23C combustion apparatus classes touch 47.8% of records. Core steelmaking class C21C appears in only 11.6% of records, indicating most competitive filing activity sits in gas chemistry and separation steps rather than furnace design itself.
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 Steelmaking Off Gas Energy 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.