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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/hypersonics-hypersonic-thermal-protection-patent-landscape-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Aerospace & PropulsionHypersonic thermal protection patents: who is filing, what they claim, and where the field is still open
493
Published Records
19%
Top-5 Share of All Records
+38%
Filing Growth 2021→2024
CN
Leading Jurisdiction
Filing growth compares 2021 (29 records) with 2024 (40) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 493 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What the hypersonic thermal protection patent record shows
Hypersonic thermal protection covers the materials, structures and coatings that keep an airframe or spacecraft intact under sustained high-velocity heating — ablative and reusable tile systems, leading-edge configurations, ceramic matrix composites, and the coatings and sensing layers bonded to them. The 493 records in scope span 2015 through the 2026 data cut-off, filed across receiving offices led by China, with the United States, Europe, Russia, WIPO and India making up the remainder. Filing activity has grown through the most recent complete year, and the assignee base is broad enough that no single entity controls the field outright.
Reading this landscape by patent family rather than raw filing count matters here: continuation practice and multi-jurisdiction filing can inflate document totals without adding new technical ground. The most useful signal is where claim density sits by IPC class and by assignee, since that shows which routes are already crowded and which are still open for a defensible first claim.
Filing activity and technology composition, 2015-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Hypersonics: Hypersonic Thermal Protection Patent Landscape covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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The data
Filing trend, assignee concentration and technology split
The figures below come directly from the 493 records in scope, the 100-company assignee ranking the dataset returns, and the IPC subclass breakdown of the same record set.
Filing trend: steady growth through the last complete year
Annual filings ran from 25 in 2017 to a peak of 50 in 2025, with the 2021-to-2024 span showing +38% growth (29 to 40 filings). Because publication lags filing by roughly 18 months, the 2025 and 2026 figures are still filling in and should not be read as a plateau or decline.
Technology composition: airframe and spacecraft structures lead
B64C (aeroplanes & helicopters) covers 31.8% of the 493 records, followed by B64G (cosmonautics & spacecraft) at 18.3% and C04B (ceramics, cement & refractories) at 12.8%. Data processing (G06F, 11.6%), layered products (B32B, 8.5%), coatings (C23C, 7.1%), aircraft equipment (B64D, 6.5%) and structural testing (G01M, 6.3%) round out the field — note these shares sum to more than 100% because a single record can carry several IPC classes.
Shares are the percentage of the 493 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 Hypersonics: Hypersonic Thermal Protection Patent Landscape covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
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A representative recent filing and the most-cited prior art
Representative recent filing
Aerospace vehicle thermal protection systems (WO2025250199A2, Radian Aerospace)
RADIAN AEROSPACE, INC.
Thermal protection systems for aerospace vehicles, such as hypersonic vehicles or space vehicles, are disclosed. The disclosed systems can protect propellant tanks and vehicle primary structures from exceeding upper design temperature limits during ascent, atmospheric re-entry and high-velocity flight. Disclosed embodiments include a framework of elongated composite members forming a plurality of cells, with insulation material such as aerogel positioned within each cell.Filed by Radian Aerospace, published 2025-12-04 — illustrates the current push toward integrated, cell-based composite-and-aerogel thermal protection rather than a single monolithic tile or coating layer.
Most-cited records in this landscape
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5560569A | Aircraft thermal protection system | 128 |
| 2 | US20050266163A1 | Extremely strain tolerant thermal protection coating and related method and apparatus thereof | 72 |
| 3 | US8844877B1 | Stay sharp, fail safe leading edge configuration for hypersonic and space access vehicles | 65 |
| 4 | CN101576024A | 回热式闭式布莱顿超燃冲压发动机冷却循环系统 | 65 |
| 5 | US5154373A | Integral structure and thermal protection system | 60 |
| 6 | US20050000383A1 | Missile with multiple nosecones | 57 |
| 7 | US20170240271A1 | Control of hypersonic boundary layer transition | 51 |
| 8 | CN103902782A | 基于POD和代理模型的高超声速气动热模型降阶方法 | 43 |
| 9 | US5884871A | Use of absorbing walls for laminar flow control | 41 |
| 10 | CN107273593A | 一种用于高马赫数强激波流场气动热预测的湍流模型及其建立方法 | 39 |
Citation counts favour older filings simply because they have had more time to be cited within the searched corpus — treat them as a signal of influence, not of current technical importance.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. 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 Hypersonics: Hypersonic Thermal Protection Patent Landscape covering 2015–2026, data cut-off 2026-07-31. 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 a filing decision
Four patterns stand out once the assignee ranking, IPC composition and receiving-office split are read together.
Concentration
18.7%
of 493 records held by the top 5 assignees
The top of the field is thin, not dominant
The leading assignee holds 25 records and the field drops to 14 by fifth place and 12 by tenth — a real lead, but nowhere near a lockout. Combined, the top 5 hold 18.7% of all 493 records and the top 10 hold 31.2%, meaning more than two-thirds of the landscape sits with entities outside the ranked leaders.
Read as: room for a new entrant to build a defensible position.
Geography
319 of 493
records filed via the China receiving office
Filing activity is heavily China-weighted
China accounts for the large majority of receiving-office filings, with the United States (53), EPO and Russia (21 each), WIPO (19) and India (11) trailing well behind. Any freedom-to-operate check that skips the Chinese filings will miss most of the prior art in this field.
Read as: China-language prior art review is not optional here.
Technology mix
31.8%
of records classed under B64C, airframe structures
Airframe integration outweighs the heat-shield material itself
B64C (aeroplanes & helicopters) is the single most-claimed IPC subclass at 31.8% of records, ahead of B64G spacecraft structures (18.3%) and C04B ceramics (12.8%). The claim space is skewed toward how the protection system is integrated into the vehicle, not just what the ablative or ceramic layer is made of.
Read as: system-integration claims are as contested as materials claims.
Growth
+38%
filing growth from 2021 (29) to 2024 (40)
Activity is still rising through the last complete filing year
The three-year span from 2021 to 2024 shows +38% growth, and 2025 posts the highest raw count so far at 50 — though publication lag means the true 2025-2026 totals will only be visible in later data pulls.
Read as: this is an expanding field, not a maturing one.
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Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Hypersonics: Hypersonic Thermal Protection Patent Landscape covering 2015–2026, data cut-off 2026-07-31. 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 landscape points to specific next steps depending on whether the goal is freedom-to-operate, competitive tracking or identifying open claim territory.
Map the crowded claim space before drafting
With B64C, B64G and C04B carrying the densest claim counts, a new filing in airframe integration or ceramic composite structure needs a tight prior-art search across those three subclasses specifically, not a generic hypersonics search.
Run a claim-density check in Eureka →Track the long tail, not just the ranked leaders
Since the top 10 assignees hold only 31.2% of records, most competitive movement will come from entities outside the ranking — worth setting up ongoing monitoring rather than a one-time leader list.
Set up assignee monitoring in Eureka →Treat co-assignee pairs as an org-structure signal
The strongest co-assignee pairing in this dataset links a launch-vehicle research institute with its near-space vehicle systems engineering counterpart, suggesting joint filing reflects internal R&D structure rather than external collaboration.
Explore assignee relationships in Eureka →Source: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Hypersonics: Hypersonic Thermal Protection Patent Landscape covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions about hypersonic thermal protection patents
The assignee ranking in this dataset covers 100 companies across 493 total records, and the leader holds 25 records with the field dropping to 14 by fifth place and 12 by tenth. That is a real but modest lead — the top 5 assignees combined hold only 18.7% of all records, and the top 10 hold 31.2%. In practice, this means competitive tracking has to look well beyond the top of the ranking, since most of the filing activity sits with a long tail of single- and low-count filers.
Airframe structure claims under IPC class B64C are the largest single category at 31.8% of the 493 records, ahead of spacecraft structures (B64G, 18.3%) and ceramic materials (C04B, 12.8%). Coatings, layered composites, data processing and structural testing each cover smaller but still meaningful shares. Because a single patent can carry multiple IPC classes, these figures overlap rather than sum to a whole field, but the ranking is consistent: system integration into the vehicle is claimed at least as heavily as the protective material itself.
Filings grew from 29 in 2021 to 40 in 2024, a documented +38% increase over that three-year span, and 2025 posted the highest raw annual count so far at 50. Because patent publication typically lags filing by around 18 months, the 2025 and 2026 figures in any dataset are still incomplete and should not be read as a slowdown. On the evidence available through the last complete filing year, the field is expanding, not maturing.
China's receiving office accounts for 319 of the 493 records in scope, far ahead of the United States (53), the European Patent Office and Russia (21 each), the WIPO/PCT route (19) and India (11). This distribution means a meaningful freedom-to-operate or landscape review in this space has to include Chinese-language filings, not just US and European ones, or it will miss most of the documented prior art.
WO2025250199A2, filed by Radian Aerospace and published in December 2025, describes a thermal protection system built from a framework of composite members forming cells filled with insulation material such as aerogel, protecting both propellant tanks and primary vehicle structure. That cellular, composite-plus-aerogel approach reflects a shift away from single-material tile or ablative layers toward integrated structural-thermal systems. It is a useful marker of where newer filings are heading, though it represents one filing rather than a trend on its own.
Answers are grounded in the same dataset. Derived from a Patsnap search on Hypersonics: Hypersonic Thermal Protection Patent Landscape covering 2015–2026, data cut-off 2026-07-31. 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.