Magnesium Alloy Microstructure Control Patents: Leaders & Trends 2026
- Filing has cooled since 2017. The peak year for new filings was 2017 at 27; by the midpoint of 2022 volume had already slipped to 21, and the trend line has not recovered since.
- China and the US dominate filing routes. China (126) and the United States (111) together account for far more receiving-office activity than the EPO, WIPO, India or Australia combined.
- Casting and treatment claims outweigh downstream processing. C22C alloy composition (414) and C22F non-ferrous treatment (313) claims dwarf extrusion (40), rolling (31) and heat-treatment (24) filings, pointing to a composition-heavy, process-light landscape.
Filing growth compares 2021 (27 records) with 2024 (24) — 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 490 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset tracks patent families filed against magnesium alloy microstructure control — grain refinement, texture control, precipitate control and microstructure engineering — classified under C22C23/00 (magnesium alloys), C22F1/06 (heat treatment of non-ferrous metals) and C22C1/03 (alloy manufacture). It spans 490 published records across the 2015–2026 window.
Coverage runs from 2015-01-01 through the 2026-07-31 cut-off. Because publication typically lags filing by around 18 months, the most recent one to two years in the trend chart understate true filing activity and should be read as provisional rather than a real decline.
Filing trends and technology composition
Two views of the same 490-family dataset: how filing volume has moved year over year, and which IPC subclasses carry the claim density.
A peak in 2017, then a plateau and decline
Filings hit their high point at 27 in 2017 and had fallen to 21 by 2022, the dataset's midpoint. With 2026 only partially reported at 6, the honest read is a technology whose filing intensity has flattened rather than one still accelerating.
Composition and treatment lead; forming lags behind
C22C (alloys, 414 records) and C22F (non-ferrous treatment, 313) are the two dominant subclasses, followed by B22D casting (92). Downstream forming — B21C extrusion (40), B21B rolling (31) — and C21D heat treatment (24) sit well behind, and A61L biomedical/sterilising overlap (60) marks a distinct biodegradable-implant sub-thread rather than a structural-alloy one.
Shares are the percentage of the 490 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Magnesium Alloy Microstructure Control with Eureka
This page is one run against one query. Ask Eureka your own question about magnesium alloy microstructure control and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records in this corpus
US20150211096A1 — Alloy for magnesium and magnesium alloy grain refinement and preparation method thereof
Describes an aluminum-zirconium-boron intermediate alloy grain refiner (5-20% Zr, 0.5-4% B, balance Al) for magnesium and magnesium alloy grain refinement, filed by Shenzhen Sunxing Light Alloys Materials Co., Ltd. on 2015-07-30.Claims a specific composition window for a grain-refiner intermediate alloy rather than a magnesium alloy composition itself.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | WO2004001087A1 | Creep resistant magnesium alloy | 73 |
| 2 | US20170268088A1 | High Conductivity Magnesium Alloy | 55 |
| 3 | US20080138236A1 | Mg Alloys Containing Misch Metal Manufacturing Method of Wrought Mg Alloys Containing Misch Metal, and Wroug… | 32 |
| 4 | US20160022876A1 | Magnesium alloy with adjustable degradation rate | 31 |
| 5 | CN103820661A | 稀土镁合金的半固态浆料制备方法 | 31 |
| 6 | US7048812B2 | Creep resistant magnesium alloy | 30 |
| 7 | US5143564A | Low porosity, fine grain sized strontium-treated magnesium alloy castings | 30 |
| 8 | US20160168678A1 | Ultrafine-grained profile of twin-crystal wrought magnesium alloys, preparation process and use of the same | 29 |
| 9 | US20150066135A1 | Bioerodible Composites for Endoprostheses | 29 |
| 10 | US20160024629A1 | Low-cost fine-grain weak-texture magnesium alloy sheet and method of manufacturing the same | 29 |
Citation counts reflect influence within this searched corpus and skew toward older filings; they are not a measure of current commercial 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.
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Browse MCP servers →What the numbers say about where this field stands
Read together, the trend, the IPC split and the citation table describe a field that filled its core composition claims early and has since slowed rather than diversified.
Growth has flattened, not accelerated
The 2017 peak of 27 filings was not sustained; by 2022 the annual count had already dropped to 21. Discount the final year or two for publication lag, but the multi-year direction is downward rather than growing.
Composition claims dominate over process claims
Alloy composition (C22C) and general non-ferrous treatment (C22F) carry the bulk of filings. Heat treatment (C21D) and rolling (B21B) are comparatively thin, suggesting more room to claim specific thermomechanical processing routes than new alloy chemistries.
Two jurisdictions carry most of the activity
China and the United States together receive far more filings than the EPO, WIPO, India or Australia. A freedom-to-operate check that skips either jurisdiction misses the bulk of the enforceable claim base.
Cross-filing is limited and concentrated
Only ten co-assignee pairings appear in the dataset, and the strongest links pair a steelmaker with an automaker or a research institute — a sign that most microstructure-control IP is filed solo rather than through joint development programmes.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to magnesium alloy microstructure control, with the prior art for and against each one.
Who is filing, and where the gate sits
Recent-year momentum has gone quiet across the assignees tracked here — several previously active filers show zero filings in the latest reported year, consistent with the overall plateau in the trend chart.
Institute filers have paused, not exited
Korean and Japanese research institutes that built up alloy and processing portfolios earlier in the window show no filings in the latest year tracked. Given publication lag, this likely reflects reporting delay as much as an actual stop.
Steel and automotive pairings anchor joint filing
The densest collaboration link pairs a steelmaker with an automaker, and a second pairs the same steelmaker with a materials research centre — both at five joint filings, the highest in the dataset.
Composition claims are the crowded lane
With C22C carrying the largest single share of filings, new entrants attempting a broad alloy-composition claim are filing into the most contested part of the landscape.
| Assignee | Recent year | YoY |
|---|---|---|
| Casting Center Ltd. | 0 | — |
| Korea Institute of Industrial Technology (KITECH) | 0 | — |
| Korea Institute of Machinery and Materials (KIMM) | 0 | — |
| Biotronik AG | 0 | — |
| National Institute for Materials Science (NIMS) | 0 | — |
| POSCO | 0 | — |
| Shanghai Jiao Tong University | 0 | -100% |
| BIORETEC | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, sourcing a licence, or finding an open filing position.
Run a freedom-to-operate check on China and US filings
Since China and the US together hold the majority of receiving-office filings, any product heading to either market should be checked against both jurisdictions' active claims before committing to a specific alloy composition or heat-treatment window.
Explore in EurekaMap the under-claimed processing branches
Thermomechanical rolling, extrusion-route refinement and heat-treatment parameter claims are thinner than composition claims, and are worth a dedicated novelty search before assuming the space is occupied.
Explore in EurekaTrack dormant institute portfolios for licensing or acquisition
Several research institutes with earlier-period filings show no recent-year activity; these portfolios may be available for licence or acquisition rather than active enforcement.
Explore in EurekaCommon questions on this landscape
The ranking in this dataset is dominated by a mix of Asian research institutes, materials companies and automotive/steel co-filers, with no single assignee holding an overwhelming share of the 490 tracked families. Filing is spread across composition specialists and a smaller group of institutes that co-file with industrial partners. Because the top of the ranking is not extremely concentrated, checking beyond the first few names is worthwhile for a full freedom-to-operate picture.
Filings peaked at 27 in 2017 and had already fallen to 21 by 2022, well before the reporting lag affecting the most recent years. This pattern is consistent with a field where the core composition space under C22C and treatment space under C22F filled up early, leaving less obvious room for broad new claims. It does not necessarily mean R&D activity itself has slowed — only that the pace of new patent filings has.
Grain refinement claims, like the representative US20150211096A1 filing, typically cover a refiner alloy composition (such as an Al-Zr-B intermediate alloy) added during casting to control final grain size. Texture control claims instead cover processing routes — rolling, extrusion or heat-treatment schedules — that orient the crystallographic texture of an already-cast alloy. The dataset shows composition-side claims (C22C, C22F) far outnumbering the rolling and extrusion classes where texture-control processing claims would sit.
C22C (alloys) and C22F (non-ferrous metal treatment) are the two largest classes in this dataset, together covering the majority of records, followed by B22D metal casting. A22F1/06 and C22C1/03 provide the anchor for composition and heat-treatment claims specifically. A thorough search should also check B21C extrusion and B21B rolling, and A61L for biodegradable-implant overlap, since these thinner classes still carry relevant prior art.
Yes, relative to the crowded composition classes. Thermomechanical rolling schedules for texture weakening, extrusion-route grain refinement, specific heat-treatment parameter windows, and semi-solid or rheocasting microstructure control all show materially fewer filings than core alloy-composition claims. That lighter density does not guarantee no prior art exists, but it does mean a narrowly drafted claim in these areas is less likely to collide with an already-crowded composition filing.
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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.