Magnesium Alloy Mechanical Properties Patents: Leaders & Trends 2026
- Filing has cooled sharply since its 2017 peak of 29 records, with the 2022 midpoint down to 6 — a field with a settled core, not a growing one.
- The most-cited prior art is almost entirely creep- and heat-resistance chemistry from the late 1990s and mid-2000s, meaning today's citation leaders may not reflect current filing activity.
- No tracked assignee shows filings in the latest year, a momentum gap that suggests either a lull in disclosure or a shift toward filings not yet published under the 18-month lag.
Filing growth compares 2021 (8 records) with 2024 (9) — 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 571 records in scope (CR5), not by the ranked leaders only.
A mature alloy chemistry field with a narrowing filing base
Magnesium alloy mechanical property patents cluster tightly around C22C alloy composition and C22F non-ferrous treatment claims, with casting (B22D) as the dominant process route. The 571 records in this corpus span 2015 through the current data cut-off, concentrated in filings that pair specific alloying elements — rare earths, zinc, zirconium — with heat treatment or extrusion schedules to hit strength-ductility or creep targets. Composition-plus-process claims dominate over composition-only claims, which narrows the room for a new entrant to claim a bare alloy formula outright.
Filing activity peaked in 2017 and has declined toward the present, with the 2022 midpoint well below peak. Because publication lags filing by roughly 18 months, the most recent years understate true activity, but the multi-year downward trend predates that lag and points to a field where the core chemistry space is largely staked out.
Filing trend and technology composition
571 patent families across a decade of filing, concentrated in a handful of IPC subclasses that trace the field's process-driven character.
Filings fell after a 2017 peak
From 29 filings in 2017 to a 2022 midpoint of 6, and down to 1 in the most recent partial year — a flat-to-declining trend that predates any reporting lag effect.
Alloy composition and heat treatment dominate
C22C (alloys) appears in 565 of 571 records and C22F (non-ferrous treatment) in 203, confirming that claims center on composition paired with processing rather than end-use application; casting (B22D, 160) is the leading process route, while biomedical (A61L, 13) and coatings (C23C, 6) remain minor branches.
Shares are the percentage of the 571 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Magnesium Alloy Mechanical Properties with Eureka
This page is one run against one query. Ask Eureka your own question about magnesium alloy mechanical properties and every answer comes back with the patent numbers behind it.
Try EurekaThe citation anchors that shaped today's claim space
Wrought magnesium alloy forging with improved formability
A wrought magnesium alloy combining group IIIa and IIIb elements with a second-phase composite microstructure, targeting high strength, toughness and extrusion or rolling formability alongside magnesium's native electromagnetic shielding — filed by PRIMOMETAL CO., LTD.Abstract condensed from the original filing language.
View full record| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | WO2004001087A1 | Creep resistant magnesium alloy | 73 |
| 2 | JP1997272945A | Heat resistant magnesium alloy molded member, heat resistant magnesium alloy used for the molding and molding… | 69 |
| 3 | US6139651A | Magnesium alloy for high temperature applications | 67 |
| 4 | EP0799901A1 | Heat-resistant magnesium alloy member | 61 |
| 5 | WO2005108634A1 | Magnesium alloy having improved elevated temperature performance | 46 |
| 6 | CN103820689A | 含两系稀土的高强耐热镁合金及其制备加工方法 | 40 |
| 7 | JP2004238676A | Magnesium alloy | 40 |
| 8 | EP1048743A1 | Creep-resistant magnesium alloy die castings | 38 |
| 9 | US5552110A | Heat resistant magnesium alloy | 38 |
| 10 | CN101693971A | 耐热稀土镁合金发动机活塞的低压铸造制备方法 | 36 |
Citation counts favor older records simply by virtue of longer exposure in the corpus; treat this as a map of influence, not of current filing priority.
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.
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Three signals stand out once the ranking and IPC tables are read together: where the prior art sits, how concentrated ownership is, and what a declining trend actually implies for freedom to operate.
Foundational creep-resistance claims are two decades old
The most-cited records in this corpus — spanning WO2004001087A1, JP1997272945A, US6139651A, EP0799901A1 and WO2005108634A1 — all address heat and creep resistance and predate 2006. New filings in this space are building on, or working around, chemistry that has had 20+ years to accumulate citations and licensing history.
A field past its filing peak, not entering one
Activity fell from a 2017 high to single digits by the 2022 midpoint and has not recovered. Combined with the 18-month publication lag, this points to a technology where the core alloy families are largely claimed and incremental filings are the norm rather than a new wave of entrants.
A small set of tight collaborations, not a broad ecosystem
Co-filing is limited to ten pairs total, and one pairing — Dead Sea Magnesium Ltd. with Volkswagen AG — accounts for the bulk of joint activity at 26 shared records. That concentration suggests automotive-materials partnerships drive a disproportionate share of joint IP, while most assignees file solo.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to magnesium alloy mechanical properties, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Dead Sea Magnesium Ltd. | Volkswagen AG | 26 |
| Korea Institute of Industrial Technology (KITECH) | EMK Co., Ltd. | 8 |
| Toyota Industries Corporation | TANIZAWA MOTOHARU | 4 |
| Toyota Industries Corporation | OKAMOTO YUKI | 4 |
| Toyota Industries Corporation | KINOSHITA KYOICHI | 4 |
| Korea Institute of Industrial Technology (KITECH) | SEO JUNG HO | 4 |
| Korea Institute of Industrial Technology (KITECH) | KIM SHAE K | 4 |
| Toyota Industries Corporation | YOSHIDA KAZUHIKO | 3 |
Co-assignment activity is thin overall (10 pairs) but sharply skewed toward one automotive-materials collaboration, a pattern worth checking before assuming any open-innovation norm in this field.
Who holds the ground, and where no one has staked a claim yet
Ownership concentrates around automotive and metallurgical research assignees, but recent-year momentum is flat across the board — a signal that filing has plateaued even for established holders.
No tracked assignee filed in the latest year
Kurimoto, Ltd., Toyota Industries Corporation, Korea Institute of Industrial Technology (KITECH), Dead Sea Magnesium Ltd., Volkswagen AG and Toyota Motor Corporation all show zero filings in the most recent year tracked. That is consistent with the broader trend decline, though publication lag means some of these may simply not have published yet.
Dead Sea Magnesium Ltd. and Volkswagen AG lead joint filing by a wide margin
This pairing's 26 shared records dwarf the next strongest pair at 8, marking it as the field's clearest cross-industry alliance between a magnesium producer and an automotive OEM — likely structural material development for vehicle components.
Filing is led by China, with the US and Europe close behind
China's receiving-office count leads the field, followed by the United States and the European Patent Office, with Japan, Australia and Canada trailing. That spread indicates a genuinely international filing strategy rather than a single home-market focus.
| Assignee | Recent year | YoY |
|---|---|---|
| Kurimoto, Ltd. | 0 | — |
| Toyota Industries Corporation | 0 | — |
| Korea Institute of Industrial Technology (KITECH) | 0 | — |
| Dead Sea Magnesium Ltd. | 0 | — |
| Volkswagen AG | 0 | — |
| Toyota Motor Corporation | 0 | — |
| Casting Center Co., Ltd. | 0 | — |
| Shanghai Jiao Tong University | 0 | -100% |
Turning this landscape into a filing or freedom-to-operate decision
The trend and ownership data narrow the question; answering it for a specific alloy composition or process route takes claim-level analysis.
Map your composition against the top-cited claims
Before drafting, check candidate alloying ranges against the creep- and heat-resistance patents that anchor this corpus's citation network.
Explore prior art in EurekaWatch the flat-momentum assignees for lagged re-filing
Zero latest-year activity across leading assignees may reverse once the 18-month publication lag clears; track filing status rather than assume exit.
Set up monitoring in EurekaTest the under-claimed branches for a first-claim opening
Biomedical degradation control and coating-integrated systems show thin IPC representation relative to core alloy claims — worth a freedom-to-operate check.
Run a white space search in EurekaCommon questions about magnesium alloy mechanical property patents
The filing trend in this corpus peaked at 29 records in 2017 and has fallen steadily, reaching 6 by the 2022 midpoint and 1 in the latest partial year. This pattern is consistent with a field where the core alloy-composition-plus-heat-treatment claims are already well staked out, so new filings tend to be incremental rather than foundational. Publication lag of roughly 18 months means the very latest years will revise upward somewhat, but the multi-year decline predates that effect and reflects a real slowdown in new disclosure.
Ownership in this space includes automotive and metallurgical research organisations such as Toyota Industries Corporation, Dead Sea Magnesium Ltd., Volkswagen AG and Korea Institute of Industrial Technology (KITECH), among others tracked in the assignee ranking. Notably, none of the leading assignees show filings in the latest tracked year, which may reflect either a genuine pause or filings still working through the publication pipeline. Co-assignee activity is thin overall — only 10 pairs — but one pairing between a magnesium producer and an automotive OEM accounts for the bulk of joint filing.
Claims center overwhelmingly on alloy composition (IPC class C22C, present in 565 of 571 records) combined with non-ferrous metal treatment (C22F, 203 records) — meaning the winning formula in this field pairs a specific elemental composition with a defined heat or mechanical treatment step. Casting (B22D, 160 records) is the leading process route for turning that chemistry into a part. Smaller branches — biomedical use, rolling, extraction and surface coating — appear in far fewer records, suggesting they are comparatively under-claimed relative to the core composition-and-treatment approach.
The five most-cited records in this corpus — WO2004001087A1, JP1997272945A, US6139651A, EP0799901A1 and WO2005108634A1 — all address heat-resistant or creep-resistant magnesium alloys and date from 1997 to 2005. Their citation counts (ranging from 46 to 73) reflect two decades of accumulated influence rather than current filing activity, since citation counts inside any searched corpus naturally favour older records. Anyone drafting new creep-resistance claims should map candidate alloying ranges against these five before assuming novelty.
The IPC composition shows biomedical-grade applications (A61L, 13 records), rolling-specific claims (B21B, 10 records), and surface coating integration (C23C, 6 records) at far lower filing density than the core C22C/C22F/B22D cluster. That thinness relative to the dominant composition-and-casting approach suggests these branches have more room for a first claim, particularly where a specific alloy is paired with a treatment or application not yet densely claimed. Any white-space filing should still be checked against the top-cited creep-resistance patents, since base alloy chemistries may already be covered even where the specific application is not.
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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.