Molten Salt Electrolysis Patents: Who Leads, Filing Trends 2026
Molten salt electrolysis patents: mapping who leads reduction, cell design and refining claims
Filing rebounded sharply after 2021, up 129% from 14 filings in 2021 to 32 in 2024 — the last year the data can be treated as complete. Filings peaked at 46 in 2018, cooled, then climbed again — 14 in 2021 to 32 in 2024, a 129% rise over that span. Treat 2025 and 2026 figures as partial; they will fill in as publications catch up with filing dates.
- 1MOLTECH INVENT11.9%
- 2NEMASKA LITHIUM6.5%
- 3TERRALITHIUM LLC2.6%
- 4TOHO TITANIUM CO LTD2.5%
- 5INNER MONGOLIA UNITED IND2.4%
See the full molten salt electrolysis of rare earth metals 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 about this landscape
Who holds the most patents in molten salt electrolysis of rare earth and light metals?
The leading assignee in this dataset holds 119 of the 1,003 records in scope, well ahead of the rest of the field. But concentration falls off quickly after that: the top 5 assignees together hold only 25.8% of all records, and the top 10 hold 35.4%. That means no single company controls freedom-to-operate here, and a clearance search needs to cover a long tail of smaller filers, not just the named leader.
Is filing activity in this field growing or slowing down?
Filing grew substantially in the recent period that can be read reliably: from 14 filings in 2021 to 32 in 2024, a 129% increase. The raw trend shows lower numbers in 2025 and 2026, but that is an artefact of publication lag — patent applications typically publish around 18 months after filing, so the most recent one to two years always look understated. Based on the complete data through 2024, activity is rebuilding rather than cooling.
Which patent classes carry the most claim density in this area?
C25C, electrolytic metal production, appears in 67.1% of the 1,003 records in scope, making it by far the densest class. C25B (electrolytic production of compounds) follows at 24.7%, and C22B (metal extraction and refining) at 14.1%. Because a single record can carry multiple IPC classes, these shares add up to more than 100% — they describe overlapping claim footprints, not a strict partition of the 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 Molten Salt Electrolysis of Rare Earth Metals 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.