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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/titanium-alloy-surface-modification-patent-landscape-patent-landscape/ · Patsnap · data cut-off 2026-08-31 · downloaded from the live page
Patent Landscape · Advanced MaterialsTitanium alloy surface modification patents: who is filing, what they claim, and where the field is still open
A data-backed view of titanium alloy surface modification patents: filing trends through 2026, leading assignees, coating and corrosion technology splits, and where claim space is still open.
800
Published Records
12%
Top-5 Share of All Records
+21%
Filing Growth 2021→2024
CN
Leading Jurisdiction
Filing growth = 2021 (48 records) → 2024 (58); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 800 records in scope (CR5), not the ranked leaders only.
Published byPatsnap Research··6 min readSourced from Patsnap Eureka
Field Overview
What this landscape covers
Titanium alloy surface modification sits at the intersection of coating chemistry, alloy metallurgy and corrosion science. The 800 records in scope span C23C coating and deposition, C22C alloy composition, and narrower classes covering non-ferrous metal treatment, electroplating, corrosion resistance and sterilisation-grade surface work for medical implants. China's receiving office accounts for the largest share of filings, with Japan, the United States, Europe and South Korea trailing behind.
The mix of assignees runs from aerospace primes and steelmakers to university labs and single-product medical device makers, which is why the field reads as broad rather than cornered by a handful of players.
Filing activity and technology mix, 2015-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Titanium Alloy Surface Modification 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 trend and technology composition
Filing volumes and IPC class distribution for the 800 records in scope, drawn directly from the underlying dataset.
A decade of steady growth, not a sudden surge
Annual filings rose from 23 in 2017 to a peak of 58 in 2024, with the 2021-2024 span alone showing 21% growth. 2025 and 2026 counts will continue to fill in as publications catch up with filing dates, so the apparent tail-off in the most recent two years is a lag artefact, not a slowdown.
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.
Coating and deposition claims dominate, corrosion and cleaning are thinner
C23C coating and surface deposition touches 74.8% of the 800 records, far ahead of C22C alloy composition at 25.8% and C22F non-ferrous treatment at 15.5%. Corrosion and metal removal (C23F, 13.9%) and cleaning of metal surfaces (C23G, 6.3%) carry the lightest claim density among the tracked classes, which is where new entrants have more room to stake distinct claims.
Shares are the percentage of the 800 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 Titanium Alloy Surface Modification 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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Try EurekaPrior Art
Most-cited records and a representative filing
Representative Filing
CN106811753A — Surface treatment method for nitinol material used in left atrial appendage occluder devices
湘潭大学
This filing from Xiangtan University discloses a biomedical nitinol surface treatment sequence: substrate pretreatment, electrochemical polishing, heat-set shaping, then a passivation step. The stated aim is improved surface finish and corrosion resistance for small, structurally complex nitinol parts, at lower processing cost than alternatives.Filed 2017-06-09; assignee Xiangtan University.
Highest-citation records in the corpus
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5869140A | Surface pretreatment of metals to activate the surface for sol-gel coating | 171 |
| 2 | US5939197A | Sol-gel coated metal | 142 |
| 3 | US5814137A | Sol for coating metals | 139 |
| 4 | US6605365B1 | Pigmented alkoxyzirconium sol | 133 |
| 5 | US6037060A | Sol for bonding epoxies to aluminum or titanium alloys | 133 |
| 6 | US5849110A | Sol coating of metals | 123 |
| 7 | US5958578A | Hybrid laminate having improved metal-to-resin adhesion | 121 |
| 8 | US5869141A | Surface pretreatment for sol coating of metals | 100 |
| 9 | US20040265780A1 | Surface treatment process for implants made of titanium alloy | 89 |
| 10 | JP2008195994A | Surface modification method for titanium product, and surface modified titanium product | 56 |
Citation counts reward older filings that have had more years to accumulate references; treat them as a signal of influence on downstream sol-gel and coating work, not as evidence that these are the most commercially active patents today.
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 Titanium Alloy Surface Modification 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 concentration and class data imply
Four read-throughs from the ranking, the trend line and the IPC split that matter for filing strategy.
Concentration
12.0% top 5
share of all 800 records
No single assignee controls the field
The leading assignee holds 33 records, but the top 5 combined account for only 12.0% of all 800 records in scope, and the top 10 for 18.0%. That leaves the majority of filing activity spread across a long tail of universities, component makers and mid-size manufacturers.
Implication: freedom-to-operate risk is diffuse rather than concentrated on one blocking portfolio.
Growth
+21%
2021 to 2024 filings
Steady build, not a spike
Filings grew from 48 in 2021 to 58 in 2024, the last year with a complete count. The climb from 23 filings in 2017 shows sustained, multi-year investment in the field rather than a reaction to a single event.
2025-26 figures will rise further as publication catches up with filing.
Technology mix
74.8%
of records touch C23C coating/deposition
Coating claims are the densest ground
Nearly three-quarters of the 800 records carry a C23C coating or deposition classification, well ahead of C22C alloy composition (25.8%) and C22F treatment (15.5%). Corrosion (C23F, 13.9%) and cleaning (C23G, 6.3%) are comparatively lighter, which is where narrower, well-drafted claims are more likely to clear.
Multiple classes per record mean these shares overlap, not sum to 100%.
Geography
477 China
of records by receiving office
Filing activity is concentrated in China's office
China's receiving office accounts for the largest single share of the 800 records, with Japan, the United States, Europe and South Korea each holding smaller shares. A filing strategy built only around US or EPO coverage misses most of the documented activity.
Receiving office reflects where protection was sought, not where R&D originated.
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Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to titanium alloy surface modification patent landscape, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Titanium Alloy Surface Modification 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
Next Steps
Where to take this analysis
The dataset points to a field with real growth but no dominant blocker. These are the practical next moves for teams acting on it.
Map your own claim against the corrosion and cleaning classes
C23F and C23G carry the lightest documented claim density of the tracked classes. A narrower novelty search focused there is more likely to surface genuine white space than a broad C23C search.
Run a targeted search in EurekaTrack the long tail, not just the leader
With the top 10 assignees holding only 18.0% of records, competitive monitoring needs to cover dozens of smaller filers, not one incumbent's portfolio.
Set up assignee monitoring in EurekaRe-check citation-heavy prior art before drafting
The most-cited records in this corpus date back years; confirm they are still enforceable and read their claims directly rather than relying on citation count as a proxy for relevance.
Pull full-text claims in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Titanium Alloy Surface Modification 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 this landscape
This dataset tracks 800 published records filed between 2015 and 2026 across IPC classes covering coatings, alloys, corrosion and related surface treatment. Filings rose from 23 in 2017 to a peak of 58 in 2024, the most recent year with a complete count, since publication typically lags filing by around 18 months. The field is active but not dominated by any single filer, with the top 5 assignees holding only 12.0% of all records.
The ranked leader holds 33 records out of 800, but concentration drops off quickly: the fifth-ranked assignee holds 13 records and the tenth holds 8. Filers span aerospace manufacturers, steelmakers, universities and medical device makers, and the top 10 combined account for only 18.0% of all records in scope. This spread means competitive tracking needs to cover a broad set of filers rather than one or two incumbents.
Coating and surface deposition (IPC class C23C) is the densest area, appearing in 74.8% of the 800 records, followed by alloy composition (C22C) at 25.8% and non-ferrous metal treatment (C22F) at 15.5%. Corrosion resistance (C23F) and metal surface cleaning (C23G) carry lighter claim density, at 13.9% and 6.3% respectively. Because a single record can carry multiple IPC classes, these shares overlap rather than sum to 100%.
Filings grew 21% from 48 records in 2021 to 58 in 2024, which is the clearest complete-year evidence of sustained growth in this dataset. Counts for 2025 and 2026 appear lower only because publication lags filing by roughly 18 months, not because activity has slowed. Treat any apparent recent-year dip as an artefact of that lag rather than a real trend change.
High citation counts reflect how often a record has been referenced by later filings, which favours older patents that have had more years in the corpus, such as the sol-gel coating patents topping this dataset's citation table. That signal indicates technical influence on the field, not current enforceability or commercial relevance. Any freedom-to-operate assessment needs a direct read of claims and current legal status, not a citation ranking.
Answers are grounded in the same dataset. Derived from a Patsnap search on Titanium Alloy Surface Modification 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.