The dataset behind this page contains 685 published records filed or published between 2015 and mid-2026 that combine electrolytic iron production terms such as molten oxide electrolysis or iron oxide electrolysis with process-specific claims language. This is not the entire universe of iron-related patents; it is a scoped search covering the specific technical routes and claim terms defined for this landscape. Because publication lags filing by roughly 18 months, the true count for 2025 and 2026 will rise as those years finish publishing.

One assignee leads the ranked field with 59 records, well ahead of the fifth-placed filer at 28 and the tenth at 14, indicating a genuine concentration of activity at the top. Even so, the top five assignees combined hold only 29.6% of all 685 records and the top ten hold 40.7%, meaning the majority of filings come from a long tail of smaller or single-filing organisations. Reviewing the full ranked list alongside recent-year filing momentum gives a clearer read on which of these leaders are still actively filing versus historically dominant but currently quiet.

In this dataset, claims tied to electrolytic routes (C25C and C25B classes) cover 47.4% and 31.1% of records respectively, while classical blast-furnace claims (C21B) appear in just 7.9%. That gap reflects where inventive activity is actually concentrated: cell chemistry, electrode design, current control and electrolyte formulation, rather than furnace hardware. It does not mean blast-furnace ironmaking has stopped being practiced commercially, only that patenting activity in this scoped dataset has moved toward electrochemical reduction routes.