MSR Radiation Shielding Patent Snapshot 2026
The MSR radiation shielding patent corpus is small and highly concentrated, with just 16 patent families in scope and the top five filers accounting for the entirety of the hundred largest filers’ combined volume. Alpha Tech Research Corp holds the largest single position, while the field has plateaued near its 2020 peak activity level.
Alpha Tech Research Corp leads a tightly held, nascent corpus
Alpha Tech Research Corp holds the leading position with 7 patent families, followed by Curio Solutions LLC with 5 patent families — together representing the majority of documented activity in this space.
The top five filers — Alpha Tech Research Corp, Curio Solutions LLC, Saltfoss Energy APS, Westinghouse Electric Corp, and TerraPower LLC — collectively account for 100% of the ranked applicants visible in this query’ combined total, indicating an extremely concentrated visible assignee structure with no meaningful long-tail of secondary applicants.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Alpha Tech Research Corp | 7 | |
| 2 | Curio Solutions LLC | 5 | |
| 3 | Saltfoss Energy APS | 2 | |
| 4 | Westinghouse Electric Corp | 2 | |
| 5 | TerraPower LLC | 1 |
The dominance of Alpha Tech Research Corp and Curio Solutions LLC, both marked as new entrants in recent filings, suggests that the field is being shaped primarily by specialist startups rather than established nuclear OEMs, with incumbents such as Westinghouse Electric Corp holding only minor positions.
Recent filing years (2024–2026) should be treated as under-counted given standard patent publication lags; the apparent modest activity in those years does not necessarily reflect a real slowdown. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Burst filing in 2020 and 2024 defines a plateau-stage field
The filing trend reveals two discrete bursts of activity — centered on 2020 and 2024 — against a largely dormant baseline, while the technology composition is overwhelmingly concentrated in a single IPC class.
Annual filing trend
A pronounced spike to 6 patent families in 2020 marks the field’s peak year, followed by near-zero activity until a secondary burst of 5 families in 2024. The 2025 and 2026 cohorts should be read as incomplete due to publication lag. The overall pattern is consistent with a lifecycle stage in which annual volume has plateaued near the 2020 peak rather than entering sustained linear growth.
↗ Hover for values · click a bar to ask EurekaTechnology composition
All classified records fall under G21C (Nuclear reactors), reflecting that radiation shielding for MSRs is currently addressed within the broader nuclear reactor design class rather than through dedicated shielding sub-classes. The absence of diversity across IPC branches signals a field that has not yet differentiated into specialized shielding materials, structural integration, or monitoring sub-domains.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Heat pipe molten salt fast reactor with stagnant l…
A molten salt reactor is described that includes a containment vessel, a reactor core housed within the containment vessel, a neutron reflector spaced from the containment vessel and positioned between the core and the containment vessel, a liquid fuel comprised of a nuclear fission material dissolved in a molten salt enclosed within the core, a plurality… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Heat pipe molten salt fast reactor with stagnant l… | 77 |
| 2 | Pool type liquid metal cooled molten salt reactor | 18 |
| 3 | Heat pipe molten salt fast reactor with stagnant l… | 7 |
| 4 | Molten nuclear fuel salts and related systems and … | 4 |
| 5 | Mixed-spectrum molten salt reactor | 2 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
Alpha Tech Research Corp
Alpha Tech Research Corp holds 7 patent families — the largest single position in the corpus — with technology emphasis spanning G21C 1 (reactor design), G21C 3 (fuel elements and assemblies), and G21C 11 (shielding). The applicant is flagged as a new entrant in recent filing activity, suggesting its portfolio was assembled rapidly rather than accumulated over decades. This position gives it meaningful claim coverage across core MSR reactor and shielding design classes.
families: 7Curio Solutions LLC
Curio Solutions LLC holds 5 patent families and is also flagged as a new entrant with 5 recent filings, indicating its entire disclosed portfolio is recent. Its technology focus mirrors the leader’s — G21C 11, G21C 3, and G21C 1 — but with slightly lower representation in G21C 1, suggesting a marginally stronger emphasis on fuel assembly and shielding configurations relative to top-level reactor architecture. Its trajectory as a new entrant with a fully recent portfolio makes it the most active challenger to watch.
families: 5Frequently asked questions
The corpus comprises 16 patent families in scope. This is a small, specialist corpus consistent with an early-to-maturing niche within the broader advanced nuclear reactor domain.
Alpha Tech Research Corp holds the largest position with 7 patent families. Curio Solutions LLC is the closest challenger with 5 patent families. Both are flagged as new entrants in recent filing activity.
Europe (EPO) leads with 7 records, followed by the United States with 3 and Australia and WIPO (PCT) with 2 each. Canada, Germany, and India each have 1 record.
The field is assessed as having reached a maturity/plateau stage, with annual filings having eased from their 2020 peak. The pattern of two discrete burst years (2020 and 2024) rather than sustained linear growth supports this reading.
No co-applicant or collaborative filings are recorded in the corpus. All patent families appear to have been filed by individual organizations acting independently, indicating the ecosystem has not yet formed joint-development structures.
G21F (dedicated radiation protection materials and structures) and G21C 17 (reactor monitoring and instrumentation) are adjacent classes with no meaningful representation in the current corpus. Both have plausible technical relevance to MSR shielding and could represent differentiated entry points for new applicants.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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