Fluidized Bed Iron Ore Reduction Patents: Who Leads 2026
Fluidized Bed Iron Ore Reduction Patents: mapping the assignees and claim space behind fine-ore DRI
One assignee dominates the founding art. The leading filer holds 58 records against a fifth-place count of 5, a gap that points to a small circle of process originators rather than a broad competitive field. Filings rose from zero in 2017 to a peak of 8 in 2022, then eased off. The single record published so far in 2026 understates real filing activity for that year, since publication typically lags filing by around 18 months.
- 1POHANG IRON & STEEL CO LTD58
- 2RES INST OF IND SCI & TECH56
- 3VOEST ALPINE AG29
- 4NIPPON STEEL CORPORATION15
- 5KIM HANG GOO5
See the full fluidized bed iron ore 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
Frequently asked questions
Who holds the core patents on fluidized bed iron ore reduction?
A single assignee holds 58 records in this 98-record dataset, far ahead of the fifth-ranked filer’s 5, indicating that the founding plant and process patents sit with one company and its closest institutional partners. The strongest co-assignee pairs in the data link that leader to two related entities, with pair counts of 54, 35 and 34. Newer entrants, including Nippon Steel with a filing in the most recent tracked year, are adding to the record but have not displaced the concentration at the top.
Is fluidized bed reduction patent activity growing or slowing down?
Filing rose from zero records in 2017 to a peak of 8 in 2022, and has not returned to that level in the years since. A precise growth rate cannot be stated because too few complete years remain once the roughly 18-month publication lag is accounted for. The practical takeaway is that the field’s busiest drafting period has likely already passed, though the most recent years remain understated in any count.
What IPC classes matter most for a fluidized bed iron ore reduction search?
C21B, the iron production and blast-furnace class, appears in 93.9% of the 98 records in scope and should anchor any search or classification review. F27B (furnaces and kilns) and C22B (metal extraction and refining) follow at 30.6% and 29.6% respectively, covering the hardware and downstream chemistry side of the same filings. Because records can carry multiple classes, these percentages overlap rather than sum to a whole field.
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 Fluidized Bed Iron Ore 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.