Titanium Alloy Coating & Surface Interface Patent Landscape
The titanium alloy coating and surface interface field is in a growth phase, with annual filings still rising and a corpus of 333 patent families anchored by a small cluster of industrial steel and aerospace incumbents. Nippon Steel Corporation leads with a commanding position, but the top five filers account for only 29% of the hundred largest filers’ combined total, leaving meaningful room for challengers and new entrants.
Nippon Steel leads a moderately concentrated field with active aerospace and materials challengers
Nippon Steel Corporation holds the top position, followed closely by ATI Properties Inc and General Electric Co—three organizations that collectively define the competitive core of this technology area.
The top five filers (Nippon Steel, ATI Properties, General Electric, Kobe Steel, and Nippon Steel & Sumitomo Metal) account for 29% of the hundred largest filers’ combined total, indicating moderate concentration with a visible tier gap between the top two and the rest of the ranked field.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Nippon Steel Corporation | 61 | |
| 2 | ATI Properties Inc | 50 | |
| 3 | General Electric Co | 29 | |
| 4 | Kobe Steel Ltd | 22 | |
| 5 | NIPPON STEEL & SUMITOMO METAL CORP | 15 | |
| 6 | Rolls-Royce PLC | 14 | |
| 7 | Toyota Motor Corporation | 14 | |
| 8 | United Technologies Corporation | 13 | |
| 9 | Kinetic Elements Pty Ltd | 11 | |
| 10 | NANJING UNIV OF AERONAUTICS & ASTRONAUTICS | 10 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | SMITH & NEPHEW INC | 9 | |
| 12 | Centre National de la Recherche Scientifique (CNRS) | 9 | |
| 13 | Sundstrand Data Control Inc | 9 | |
| 14 | Helmholtz-Zentrum Geesthacht Centre for Materials and Coastal Research | 9 | |
| 15 | CHINA UNIV OF MINING & TECH | 8 | |
| 16 | Raytheon Co | 8 | |
| 17 | Toyota Central R&D Labs Inc | 8 | |
| 18 | Northwest Institute for Nonferrous Metal Research | 8 | |
| 19 | Callidus Welding Solutions Pty Ltd | 8 | |
| 20 | The Boeing Co | 8 |
The leaders’ positions reflect deep integration of alloy composition and surface treatment expertise, particularly in aerospace turbine and structural applications, signaling that incumbents have built broad blocking portfolios around core processing routes.
Filing counts for 2025 and 2026 are subject to publication lag and will increase as applications publish; they should not be read as a slowdown. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Steady growth trajectory with alloy composition and surface deposition dominating the technology mix
The annual trend and technology branch breakdown together reveal a field expanding steadily from its 2017 base, with a broad but well-defined technology structure centered on alloy formulation and coating deposition.
Annual filing trend
Filings have grown roughly 8% on a recent multi-year basis, with 2024 representing the highest single-year count in the visible window at 46 records. The 2025 and 2026 counts are understated due to publication lag and will revise upward.
↗ Hover for values · click a bar to ask EurekaTechnology composition
C22C (Alloys) is the dominant branch by a wide margin, followed by C23C (Coating & surface deposition) and C22F (Non-ferrous metal treatment), confirming that the field is fundamentally about alloy design coupled with deposition and post-treatment processes. Adjacent branches such as B33Y (additive manufacturing) and A61L (sterilising and disinfecting) signal emerging application pull from medical and advanced manufacturing sectors.
↗ 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.
A method for surface modification of titanium and …
A method for surface modification of a titanium substrate or a titanium alloy substrate comprising: a) applying at least one beta phase stabiliser to a surface of the titanium substrate or titanium alloy substrate; and b) heating the surface so as to alloy titanium with the at least one beta phase stabiliser. (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Titanium alloy blade coupler coated with nickel-ch… | 492 |
| 2 | Surface and near surface hardened medical implants | 212 |
| 3 | Biocompatible low modulus titanium alloy for medic… | 104 |
| 4 | Thermally sprayable powder materials having an all… | 94 |
| 5 | Method for processing-microstructure-property opti… | 88 |
| 6 | Spray bonding of nickel aluminum and nickel titani… | 86 |
| 7 | Continuous fiber-reinforced titanium-based composi… | 61 |
| 8 | High strength titanium-aluminum alloy having impro… | 60 |
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.
What the competitive structure means for R&D investment decisions
The combination of moderate concentration, active growth, and diverse application end-markets creates a landscape where targeted entry in adjacent branches remains viable alongside competition with incumbents on core alloy and coating routes.
Growth stage—annual filings still rising
The field is classified at the Growth lifecycle stage, with annual filings still rising and the recent multi-year window showing 8% growth. The 2024 peak of 46 records per year has not yet shown a sustained retreat, and publication lag means the most recent periods are understated. Investors entering now face an active but not yet consolidated competitive environment.
Growth phaseModerate concentration with a clear tier-one gap
Nippon Steel Corporation (61 patent records) and ATI Properties Inc (50 patent records) sit substantially ahead of the next tier, which ranges from 29 (General Electric) down to 8 records. The top five filers hold 29% of the hundred largest filers’ combined total—high enough to create blocking risk in core alloy and deposition routes, but not so dominant as to close off adjacent application segments.
Moderate concentrationToyota–Toyota Central R&D Labs dyad is the most active co-filing pair
The most active co-applicant relationship is between Toyota Motor Corporation and Toyota Central R&D Labs (6 joint filings), reflecting integrated OEM–research institute collaboration on alloy and surface treatment for automotive applications. A secondary pairing between Toyota Motor Corporation and Aisan Industry Co. (3 joint filings) extends this cluster. Nippon Steel Corporation appears in two further collaborative pairs, including one with Casio Computer Co., suggesting cross-sector surface property interests.
OEM-research institute pairsUS and China are near-parity lead jurisdictions; Europe is a significant secondary market
The United States (192 patent records) and China (191 patent records) are essentially co-equal as the primary filing destinations, with Europe via EPO a meaningful third at 130 records. Japan (66 records) and WIPO PCT (51 records) round out the top five, indicating that leading applicants are pursuing broad international protection. Australia (36 records) is notable given the presence of Australian applicants Kinetic Elements Pty Ltd and Callidus Welding Solutions Pty Ltd in the top-20 ranking.
US–China parityGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Toyota Motor Corporation | Toyota Central R&D Labs Inc | 6 |
| Toyota Motor Corporation | Aisan Industry Co Ltd | 3 |
| Nippon Steel Corporation | Casio Computer Co Ltd | 2 |
| Kobe Steel Ltd | Toyota Motor Corporation | 2 |
| Nippon Steel Corporation | Shinto Pretech Co Ltd | 1 |
| Kobe Steel Ltd | Yukawa Natsuo | 1 |
| Kobe Steel Ltd | Morinaga Masahiko | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Nippon Steel and ATI Properties anchor the field; General Electric is emerging as a new entrant
The ranking is led by two materials-specialist incumbents with broad alloy and processing portfolios, while aerospace engine makers occupy the mid-tier and a new entrant signals fresh activity from General Electric.
Nippon Steel Corporation
Nippon Steel Corporation leads with 61 patent records, concentrated in C22C (Alloys), C22F (Non-ferrous metal treatment), and F01N (Exhaust treatment), reflecting a broad materials and processing platform that spans automotive and industrial applications. Its scale advantage over the second-ranked applicant is significant, and its collaborative filing with Casio Computer Co. suggests exploration of surface property applications beyond traditional structural uses.
patent records: 61General Electric Co
General Electric Co ranks third with 29 patent records but is flagged as a new entrant in the recent filing period, indicating accelerating activity from a low recent base. Its technology focus is centered on C22C (Alloys), C22F (Non-ferrous metal treatment), and C22B (Metal extraction and refining), suggesting a push toward upstream alloy qualification for turbine and aerospace components—consistent with its industrial gas turbine business.
patent records: 29| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| General Electric Co | 5 | ▲ new entrant |
| Taiyuan University of Technology | 2 | ▲ new entrant |
Under-served branches in additive manufacturing, medical sterilisation, and layered structures
Several IPC branches adjacent to the core alloy and coating clusters show relatively low patent record counts compared to their technical relevance to titanium surface engineering, making them worth monitoring as potential entry points.
B33Y · Additive manufacturing (3D printing)
B33Y accounts for 65 patent records—just 3% of the corpus by branch share—despite additive manufacturing being a primary route for near-net-shape titanium components where surface and interface quality is critical. The technical rationale for filing here is strong: layer-by-layer deposition creates inherent surface heterogeneity that demands interface control. Entry paths include deposition parameter optimization and post-build surface treatment processes, areas where the existing dense core (C22C, C23C) does not yet provide full coverage.
Search this in Eureka →A61L · Sterilising & disinfecting (biomedical surface coatings)
A61L registers 64 patent records (3% branch share), reflecting early-stage patent activity around biocompatible and antimicrobial titanium surface treatments for medical implants. The top-cited corpus already includes patents on surface-hardened medical implants and low-modulus biocompatible titanium alloys, confirming clinical demand. This branch sits between the established A61F (Implants) and core C23C (Coating) clusters, and organizations without strong incumbent positions in those core branches may find more open space here for surface chemistry and sterilisation-method claims.
Search this in Eureka →How leading applicants differ across alloy, coating, and application-specific technology routes
Route coverage across the main technology branches in the current evidence set.
| Player | C22C 14 · Alloys | C22F 1 · Non-ferrous metal treatment | C23C 8 · Coating & surface deposition | C22C 1 · Alloys | C23C 4 · Coating & surface deposition |
|---|---|---|---|---|---|
| ATI Properties Inc | Strong · 50 | Strong · 45 | Absent | Absent | Absent |
| Nippon Steel & Sumitomo Metal Corporation | Strong · 35 | Strong · 19 | Emerging · 6 | Absent | Absent |
| General Electric Co | Strong · 29 | Moderate · 13 | Absent | Moderate · 7 | Absent |
| Nippon Steel Corporation | Strong · 31 | Moderate · 14 | Absent | Absent | Absent |
| United Technologies Corporation | Strong · 17 | Moderate · 6 | Absent | Absent | Absent |
| Kobe Steel Ltd | Strong · 16 | Absent | Moderate · 6 | Absent | Absent |
| Callidus Welding Solutions Pty Ltd | Absent | Strong · 5 | Strong · 7 | Absent | Strong · 6 |
Frequently asked questions
The corpus covers 333 patent families. This is the foundational unit for trend and scope analysis in this landscape.
Nippon Steel Corporation leads with 61 patent records, ahead of ATI Properties Inc at 50 and General Electric Co at 29.
The United States (192 patent records) and China (191 patent records) are near-parity lead jurisdictions, followed by Europe via EPO at 130 records, Japan at 66, and WIPO PCT at 51.
The field is classified as Growth stage, with annual filings still rising and a recent multi-year growth rate of 8%. The 2024 filing count of 46 records was the highest in the visible window.
C22C (Alloys) is dominant, followed by C23C (Coating and surface deposition) and C22F (Non-ferrous metal treatment). Adjacent active branches include B22F (Powder metallurgy), B23K (Welding), B33Y (Additive manufacturing), and A61L (Sterilising for biomedical applications).
Yes. The most active co-filing relationship is between Toyota Motor Corporation and Toyota Central R&D Labs with 6 joint filings, followed by Toyota Motor Corporation and Aisan Industry Co. with 3 joint filings. Nippon Steel Corporation participates in two further co-applicant pairings including one with Casio Computer Co.
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