Ceramic Matrix Composite Patents: Leaders & Filing Trends 2026
A data-driven look at the ceramic matrix composite patent landscape: who leads filing, how concentrated the top assignees are, where the technology classes cluster, and where the white space sits for 2026.
Filing growth = 2021 (525 records) → 2024 (483); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 8,756 records in scope (CR5), not the ranked leaders only.
What the ceramic matrix composite patent record actually shows
Ceramic matrix composite (CMC) patenting is not spread evenly across the ceramics industry. It clusters tightly around one application: hot-section turbine hardware for jet engines and power generation. The search set of 8,756 records spans 2015 through the current filing year, and the assignee ranking is dominated by engine builders and their aerostructure suppliers rather than by general ceramics manufacturers.
That clustering matters for anyone entering the space. A new filing aimed at general ceramic component fabrication faces a different competitive map than one aimed at turbine vanes, blades or combustion liners — the latter sits on top of a dense, decades-deep prior-art base built by a small number of aerospace propulsion companies.
Filing trend and technology composition
The figures below use the full 8,756-record set. Because publication trails filing by roughly 18 months, the last one to two years understate real filing activity and should not be read as a slowdown.
Filing activity, 2017–2026
Filings rose from 476 in 2017 to a peak of 620 in 2019, then eased back. Comparing the two most recent complete years usable for a growth read, 2021 (525) to 2024 (483) is an 8% pullback — a plateau in a mature application area, not a retreat from the technology.
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.
Where the classifications sit
C04B (ceramics, cement and refractories) tags 46.6% of records and F01D (turbines and non-positive-displacement engines) tags 37.4%, confirming that the bulk of CMC patenting is written for turbine applications rather than for ceramics processing on its own. B32B (layered products), F02C (gas-turbine plants), F23R (combustion chambers), C23C (coatings), B28B (shaping) and F02K (jet propulsion) each contribute a smaller but consistent secondary share, since a single record commonly carries several classification codes at once.
Shares are the percentage of the 8,756 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
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Try EurekaThe record that shapes today's claim landscape
Process of producing a ceramic matrix composite turbine bucket, insert for a ceramic matrix composite turbine bucket and ceramic matrix composite turbine bucket
The application describes a process for building a CMC turbine bucket using a preform with an enclosed dovetail cavity and an insert — either foam or a stack of CMC plies — placed inside that cavity before the assembly is fired in a furnace. The insert geometry is shaped to match the dovetail cavity, letting a single fabrication route accommodate different bucket geometries.Filed 2015-05-28 by GE Infrastructure Technology LLC.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6648597B1 | Ceramic matrix composite turbine vane | 290 |
| 2 | US6709230B2 | Ceramic matrix composite gas turbine vane | 221 |
| 3 | US6758653B2 | Ceramic matrix composite component for a gas turbine engine | 203 |
| 4 | US5127783A | Carbon/carbon composite fasteners | 202 |
| 5 | US20120027572A1 | Turbine ring assembly | 190 |
| 6 | US20050183909A1 | Disc brake rotor assembly and method for producing same | 183 |
| 7 | US6325593B1 | Ceramic turbine airfoils with cooled trailing edge blocks | 170 |
| 8 | US20030059577A1 | Ceramic matrix composite structure having integral cooling passages and method of manufacture | 163 |
| 9 | US6397603B1 | Conbustor having a ceramic matrix composite liner | 162 |
| 10 | WO2006097876A1 | Phosphor in polycrystalline ceramic structure and a light-emitting element comprising same | 156 |
Ranked by citation count within this corpus. Older grants score highest because citation counts accumulate over time — treat them as evidence of influence on later filings, not as a signal of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns stand out once the ranking, the trend and the classification split are read together.
The field is led by a small aerospace-propulsion cluster
The top five assignees combined hold 42.7% of all records in scope, and the top ten hold 57.8%. The leader alone accounts for 1,443 filings — well ahead of the rest of the ranked list, where fifth place sits at 309 and tenth place at 235. This is a field where a handful of engine and aerostructure companies have built durable claim positions over a decade.
Activity has plateaued, not collapsed
Annual filings peaked at 620 in 2019 and eased to 483 by 2024, an 8% pullback over that three-year span after the 2021 figure of 525. Given the 18-month publication lag, the most recent years on the chart will still fill in as more records publish.
Turbine hardware dominates the claim base
Only 46.6% of records sit under the core ceramics class C04B, while 37.4% also carry the turbine-machinery class F01D, and smaller shares carry gas-turbine, combustion-chamber and jet-propulsion codes. CMC patenting is overwhelmingly written for hot-section engine parts, not general ceramic component manufacture.
Filing offices track engine-manufacturing bases
The United States leads with 2,804 records, followed by China at 2,200 and the EPO at 1,555; WIPO, Japan and Canada each carry smaller but active shares. The spread reflects where turbine and aerostructure manufacturing capacity actually sits rather than a uniform global filing pattern.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to technical ceramics: ceramic matrix composite patent landscape, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Rolls-Royce Corp | Rolls-Royce North American Technologies Inc | 213 |
| Rolls-Royce Corp | ROLLS ROYCE HIGH TEMPERATURE COMPOSITES INC | 131 |
| ROLLS ROYCE HIGH TEMPERATURE COMPOSITES INC | Rolls-Royce North American Technologies Inc | 74 |
| Rolls-Royce Corp | Rolls-Royce plc | 55 |
| Safran Ceramics SA | Safran Aircraft Engines SAS | 54 |
| Safran Ceramics SA | French National Centre for Scientific Research (CNRS) | 44 |
| Rolls-Royce plc | Rolls-Royce North American Technologies Inc | 37 |
| ROLLS ROYCE HIGH TEMPERATURE COMPOSITES INC | Rolls-Royce plc | 28 |
The ten strongest co-assignee pairs are dominated by affiliated Rolls-Royce entities filing jointly, which points to internal group structuring around CMC IP rather than external cross-licensing partnerships.
Turning this landscape into a filing or freedom-to-operate decision
The counts above describe where claims already sit. Deciding whether a new CMC concept can clear that art, or where it should be filed instead, takes a closer read of the specific claims involved.
Check freedom-to-operate before drafting
Run the specific fiber architecture, matrix chemistry or component geometry against the densest classes — C04B and F01D together cover most of the corpus — before committing claim language.
Explore Eureka for FTO analysis →Track the concentrated leaders
With five assignees holding 42.7% of records, monitoring their continuation filings and newly published applications is a more efficient early-warning signal than watching the field broadly.
Set up assignee tracking in Eureka →Look past the turbine cluster
Secondary classes like B28B (shaping) and C23C (coatings) carry far fewer records than C04B or F01D, which may indicate room to file outside the crowded hot-section engine cluster.
Map white space in Eureka →Common questions about the CMC patent landscape
The ranking is led by aerospace-engine manufacturers and their propulsion subsidiaries, with the top assignee alone accounting for 1,443 of the 8,756 records in scope. The top five combined hold 42.7% of all records, and the top ten hold 57.8%, which is a high concentration for a materials technology. Most of the volume in the ranked leaders comes from companies building turbine engines rather than from ceramics-only manufacturers, reflecting where CMC parts are actually deployed.
Filing peaked in 2019 at 620 records and has since plateaued rather than kept climbing: 2021 recorded 525 filings and 2024 recorded 483, an 8% decline over that span. Because publication lags filing by about 18 months, the 2025 and 2026 figures in any chart are still incomplete and should not be read as a further drop. Overall the pattern reads as a mature, steady filing base rather than a technology losing momentum.
This dataset is built around the intersection of ceramic matrix composite claims with turbine and aerospace propulsion applications, which is why classes like F01D (turbines), F02C (gas-turbine plants) and F02K (jet propulsion) appear alongside the core ceramics class C04B. General technical ceramics patenting, by contrast, covers a much broader set of applications — electronics substrates, cutting tools, biomedical ceramics — that fall outside this scope. A search focused purely on C04B without the CMC-specific and turbine-application terms would return a different, less concentrated assignee picture.
The United States receives the most filings at 2,804 records, followed by China at 2,200 and the European Patent Office at 1,555. WIPO's PCT route accounts for 464 records, with Japan at 423 and Canada at 320. This spread roughly tracks where jet-engine and aerostructure manufacturing is concentrated, rather than reflecting uniform global R&D activity.
This GE Infrastructure Technology filing describes a process for producing a CMC turbine bucket using a preform with an enclosed dovetail cavity, into which an insert — either foam or a stack of CMC plies — is placed before the assembly is furnace-fired. It matters because dovetail-cavity fabrication is a recurring structural challenge in CMC turbine hardware, and this filing sits within the same technology cluster as the corpus's most-cited records on CMC turbine vanes and blades. Anyone designing a CMC turbine bucket with an internal cavity insert should check this filing's claim scope directly rather than relying on the abstract alone.
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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.