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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/radiation-shielding-material-patent-landscape-patent-landscape/ · Patsnap · data cut-off 2026-08-31 · downloaded from the live page
Patent Landscape · Nuclear Fission & Fusion EnergyRadiation shielding material patents: who is filing, where claim density sits, and what is still open
A data-backed look at radiation shielding material patents: filing trends since 2017, IPC composition across G21F, G21C and adjacent polymer/ceramic classes, leading assignees, and where claim space remains open.
1,020
Published Records
15%
Top-5 Share of All Records
+3%
Filing Growth 2021→2024
JP
Leading Jurisdiction
Filing growth = 2021 (38 records) → 2024 (39); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 1,020 records in scope (CR5), not the ranked leaders only.
Published byPatsnap Research··6 min readSourced from Patsnap Eureka
Overview
What this landscape covers
Radiation shielding material patents span from bulk shielding compositions used in reactor construction to specialised composites for medical and personnel protection. The scope here pulls from 1,020 published records filed or published between 2015 and 2026, filtered to IPC classes G21 and G21C and matched against title, abstract and claim language referencing shielding materials in nuclear or fusion reactor contexts. Publication lags filing by roughly 18 months, so figures for 2025 and 2026 undercount actual filing activity and should be read as provisional.
The dataset mixes core nuclear-reactor shielding claims with a substantial share of composite and polymer material science, plus a smaller but persistent medical-device overlap. That mix matters for anyone deciding where to file: a claim written purely around a shielding composition sits in denser prior art than one that ties a novel composite to a specific reactor or medical application.
Filing activity and technology composition, 2017–2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Radiation Shielding Material Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
The Numbers
Filing trends and technology composition
Two views of the same 1,020 records: how filing activity has moved year over year, and how claims are distributed across IPC subclasses.
Filing trend, 2017–2026
Filings peaked in 2017 at 40 and have since settled into a steadier band; the 2021-to-2024 window shows a 3% increase (38 to 39), a sign of a stable rather than surging field. The final one or two years in the chart are undercounted due to publication lag and should not be read as a decline.
Publication lags filing by roughly 18 months, so 2025 onwards are still filling in. Growth rates on this page therefore end at 2024; running them to the last bar would understate the field.
IPC subclass composition
G21F (radiation protection and shielding) covers 81.4% of the 1,020 records, far ahead of G21C (nuclear reactors) at 16.0% and G21K (particle and radiation handling) at 7.8%. Materials-science classes — C08K, C08L, C04B — each sit under 7%, and the medical overlap A61B sits at 4.8%, indicating claim activity outside core shielding chemistry is comparatively thin.
Shares are the percentage of the 1,020 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Radiation Shielding Material Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.
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Representative filing and most-cited prior art
Recent Representative Filing
Neutron radiation shielding material, semiconductor package and nuclear reactor (EP4712135A1)
DEXERIALS CORPORATION
The filing describes a neutron radiation shielding material with an attenuation ratio of 1e-2 or less against 0.5 eV neutron radiation at a 1 cm material thickness, aimed at shielding neutron radiation in semiconductor package and reactor contexts.Filed by Dexerials Corporation, published 2026-03-18 — among the most recent filings in scope.
Most-cited records in this landscape
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5099134A | Collimator and a method of producing a collimator for a scintillator | 160 |
| 2 | US4196355A | Radiation shield vest and skirt | 126 |
| 3 | US3895143A | Metal-fiber-latex-containing sheet materials | 100 |
| 4 | US6548570B1 | Method for manufacturing a radiation shielding material | 93 |
| 5 | US6372157B1 | Radiation shielding materials and containers incorporating same | 92 |
| 6 | US5994706A | Article irradiation system in which article-transporting conveyor is closely encompassed by shielding material | 87 |
| 7 | US4847505A | Storage and transport containers for radioactive medical materials | 84 |
| 8 | US3984696A | Radiation guard for X-ray table | 84 |
| 9 | US5397902A | Apparatus and method for the preparation of a radiopharmaceutical formulation | 72 |
| 10 | JP2001242288A | Radiation shielding material, and radiation shielding suit, radiation shield and radiation shielding equipmen… | 71 |
Citation counts favour older filings that have had more time to accumulate citations within the searched corpus; treat them as a signal of influence on the field, not of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Radiation Shielding Material Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the numbers mean for filing strategy
Four read-throughs from the ranking, trend and classification data, aimed at where to file and who to watch.
Concentration
14.8%
of 1,020 records held by top 5 assignees
No single company controls the field
The leading assignee holds 40 records, but the top 5 combined only reach 14.8% of all 1,020 records in scope, and the top 10 reach 22.2%. That leaves a long tail of single- and few-filing entrants rather than a field locked up by a handful of incumbents.
Ranking covers 100 companies as returned by the data endpoint.
Filing pace
+3%
growth, 2021 to 2024 filings
A steady field, not a growing one
Filings peaked in 2017 at 40 and have since plateaued; the 2021-to-2024 window (38 to 39 filings) shows only 3% growth. This points to an established technology area where incremental filing continues but new entrants are not rushing in.
2025–2026 figures are undercounted due to publication lag.
Claim density
81.4%
of records classified under G21F
Radiation protection claims dominate
G21F, radiation protection and shielding, appears in 81.4% of the 1,020 records — the densest single class by a wide margin. G21C (nuclear reactors) and G21K (particle handling) trail well behind, at 16.0% and 7.8% respectively.
A record may carry multiple IPC classes; shares do not sum to 100%.
White space
<7%
share for C08K, C08L and C04B combined coverage
Materials chemistry is comparatively under-claimed
Composite and ceramic material classes — C08K (polymer additives), C08L (polymer compositions) and C04B (ceramics and refractories) — each sit under 7% of records. Given how central material composition is to shielding performance, this gap suggests room for claims that specify novel composite formulations tied to shielding function.
Figures are independent shares of the 1,020-record total, not a combined percentage.
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Co-filing patterns
| Assignee | Co-assignee | Shared families |
|---|---|---|
| University of Tsukuba | Dexerials Corporation | 16 |
| University of Tsukuba | Daiko Seisakusho Co., Ltd. | 9 |
| University of Tsukuba | National Institute of Advanced Industrial Science and Technology (AIST) | 8 |
| Westinghouse Electric Corporation | University of Pittsburgh - Of the Commonwealth System of Higher Education | 6 |
| Nihon Medi-Physics Co., Ltd. | NMP Business Support Co., Ltd. | 5 |
| Kyowa Gas Chemical Industry Co., Ltd. | HAMILTON VERNON D | 2 |
| Kyowa Gas Chemical Industry Co., Ltd. | HAMILTON JUDD D | 2 |
| Toshiba Corporation | Toshiba Engineering Corporation | 2 |
Ten co-assignee pairs appear in the dataset, with the strongest pairing linking a university research group to a materials manufacturer — a pattern consistent with academic-industry co-development rather than pure in-house filing.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Radiation Shielding Material Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this analysis
The dataset points to a stable, fragmented field with identifiable gaps in composite material claims. Use Patsnap Eureka to go from these findings to specific freedom-to-operate and design-around work.
Map claim scope around the top-cited prior art
The most-cited records set boundaries that newer composite and composition claims still need to navigate. Running a claim-chart comparison against these anchors clarifies what is actually blocked versus merely adjacent.
Explore prior art in EurekaTest a composite-material claim against the white space
With C08K, C08L and C04B each under 7% of records, a claim tying a specific composite formulation to shielding performance may have more room than a pure shielding-composition claim in the dense G21F space.
Draft and stress-test claims in EurekaTrack the long tail of single-filing entrants
With the top 10 assignees holding only 22.2% of records, new competitive threats are as likely to come from an unranked filer as from an incumbent. Ongoing monitoring catches these before they compound.
Set up assignee tracking in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Radiation Shielding Material Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions about radiation shielding material patents
The ranking covers 100 companies, with the leading assignee holding 40 of the 1,020 records in scope. However, concentration is low overall: the top 5 assignees combined account for only 14.8% of all records, and the top 10 reach 22.2%. This means the field has a long tail of smaller filers alongside a modest set of more active companies, rather than being dominated by two or three players.
Filing activity peaked in 2017 at 40 records and has since settled into a steadier pattern, with 2021-to-2024 filings rising only 3% (from 38 to 39). This is best read as a mature, stable field rather than one experiencing rapid growth or decline. Figures for 2025 and 2026 are understated because publication typically lags actual filing by roughly 18 months, so recent years should not be read as a drop-off.
G21F, covering radiation protection and shielding, appears in 81.4% of the 1,020 records and is by far the densest classification. G21C (nuclear reactors) follows at 16.0%, and G21K (particle and radiation handling) at 7.8%. Materials-science classes such as C08K, C08L and C04B each sit under 7%, indicating that composite and ceramic material claims are comparatively less crowded than core shielding-composition claims.
The clearest gap sits in composite and ceramic material chemistry: C08K (polymer additives), C08L (polymer compositions) and C04B (ceramics and refractories) each account for under 7% of the 1,020 records, despite material composition being central to shielding performance. A claim that specifies a novel composite or ceramic formulation tied explicitly to shielding function, rather than a general shielding composition, is likely to face less prior art density than one filed purely under G21F.
EP4712135A1, filed by Dexerials Corporation and published 2026-03-18, describes a neutron radiation shielding material achieving an attenuation ratio of 1e-2 or less at 0.5 eV with a 1 cm thickness, targeted at semiconductor packaging and reactor applications. Its filing date places it among the most recent records in scope, illustrating that active filing continues at the intersection of shielding materials and semiconductor or reactor integration, an area that sits across multiple IPC classes rather than G21F alone.
Answers are grounded in the same dataset. Derived from a Patsnap search on Radiation Shielding Material Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company's registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.