Sodium and Lead Fast Reactors Patents: Leaders & Filing Trends 2026
Sodium and Lead Fast Reactor Patents: Who Leads and Where the Claims Sit
One assignee dominates the ranking. the leader holds 90 records against a fifth place of 17 and a tenth place of 10 — a steep drop-off after the top position. Filings rose to a peak of 14 in 2017. Using the complete-year window the dataset supports, 2021's 14 filings dropped to 2 by 2024 — an -86% move. Treat 2025 and 2026 figures as provisional; they will revise upward as more filings publish.
- 1TERRAPOWER LLC90
- 2SEARETE LLC33
- 3COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES21
- 4WOOD LOWELL L JR18
- 5ADVANCED REACTOR CONCEPTS LLC17
See the full sodium and lead fast reactors 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 on sodium and lead fast reactors?
One assignee leads this landscape by a wide margin, with 90 records against a fifth-place count of 17 and a tenth-place count of 10 across the 41 assignees in the ranking. That gap indicates a single company has built the deepest portfolio in reactor-core and coolant-loop hardware, while the rest of the field files in the low teens or fewer. Anyone doing competitive tracking in this space should treat that leader’s portfolio as the baseline to check against before filing on core reactor hardware.
Is patent filing activity in sodium and lead fast reactors growing or slowing?
Filings peaked at 14 in 2017 and, over the most recent complete three-year window in this dataset, fell from 14 in 2021 to 2 in 2024 — an -86% change. That is a genuine pull-back rather than a data artefact, because 2024 falls inside the window the dataset treats as complete. Figures for 2025 and 2026 are still provisional since publication typically lags actual filing by around 18 months, so those years will revise upward over time.
What technology areas do these patents actually cover?
The corpus is dominated by G21C nuclear-reactor classifications, present in 85.5% of the 179 records in scope, covering core design, coolant loops and related reactor hardware. G21D nuclear-power-plant claims follow at 24.6%, with smaller pockets in digital control (G06F), electrolytic compound production (C25B), radiation shielding (G21F), acyclic compounds (C07C), alloys (C22C) and analogue computing (G06G). Because a single record can carry multiple IPC classes, these shares add up to more than 100% of the record total.
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 Sodium and Lead Fast Reactors 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.