Top Gas Recycling Patents: Leaders & Filing Trends 2026
Top Gas Recycling and Carbon Reduction Patents in Blast Furnace Ironmaking
83.0% of all 382 records sit with just five assignees — this field is about as concentrated as ironmaking IP gets. Filings peaked at 50 in 2020, then fell from 29 in 2021 to 10 in 2024 — a 66% drop over that span. Treat 2025 and 2026 figures as undercounted: publication lags filing by roughly 18 months, so the most recent years will keep filling in as more records publish.
- 1PAUL WURTH SA158
- 2LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE73
- 3ARCELORMITTAL SA51
- 4PRIMETALS TECH AUSTRIA GMBH22
- 5JFE STEEL CORP13
See the full top gas recycling and carbon reduction 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 holds the most patents in top gas recycling and carbon reduction for blast furnaces?
One assignee leads the ranked field with 158 of the 382 records in scope, a wide margin over the next four ranked companies, who together bring the top 5 combined to 317 records, or 83.0% of everything in the dataset. Fifth place sits at only 13 records, showing how sharply filing activity drops off after the leader. This concentration means most of the process-level claim space in this exact search scope is already occupied by a handful of companies rather than spread across the 41 ranked assignees.
Is patent filing in blast furnace gas recycling still growing?
No — filings peaked in 2020 at 50 and had fallen to 10 by 2024, down from 29 in 2021, a 66% decline over that three-year span. 2024 is the most recent year the trend can treat as complete; 2025 and 2026 figures will keep rising as publications catch up, since publication typically lags filing by around 18 months. Read the recent slowdown as real but not final — it reflects a cooling wave of filing activity after the 2020 peak, not a dead field.
What technologies fall under this patent landscape search?
The scope combines blast furnace top gas handling — reducing gas injection, shaft tuyere injection, gas recirculation loops, oxygen blast furnace operation — with the carbon capture and gas cleaning side: pressure swing adsorption, carbon dioxide removal and top gas cleaning. IPC data shows 89.8% of the 382 records classify under C21B iron production, with F27B and F27D furnace-hardware classes each covering roughly a quarter of records and B01D separation processes at 9.2%. It is primarily a process-claims field with a secondary hardware layer.
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 Top Gas Recycling and Carbon Reduction 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.