Magnesium Alloys Patents: Who Leads, Where Filings Are Fading 2026
- Filing has cooled sharply. annual filings peaked at 97 in 2017 and have fallen to 15 by 2026, with the 2022 midpoint at 73 — a steady decline, not a plateau.
- Alloy composition claims dominate the class map. C22C alloy claims appear in 1,924 of 2,245 records, more than double the next-largest subclass, so most of the core claim space is already staked.
- China now files more than any single office. 542 records route through China, ahead of the United States at 483 and the EPO at 393 — a sign of where contested claim territory is shifting.
Filing growth compares 2021 (61 records) with 2024 (54) — 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 2,245 records in scope (CR5), not by the ranked leaders only.
What this dataset covers
This landscape tracks 2,245 patent families filed between 2015 and 2026 that combine magnesium alloy compositions with lightweighting-relevant processing: die casting, corrosion protection, creep resistance and grain refinement. The IPC scope is narrow by design — C22C23, C22F1 and C23C22 — so the set captures alloy chemistry and post-processing claims rather than every downstream automotive or aerospace application that happens to use magnesium.
Publication lags filing by roughly 18 months, so the 2025-2026 counts in any trend line are undercounts of what has actually been filed. Treat the recent-year drop as a floor, not a final figure, while still taking the multi-year decline from the 2017 peak as real.
Let an AI agent run this analysis on your own technology
Pick a task. Every answer cites the patents behind it.
Filing trend and technology composition
Two views of the same 2,245-family dataset: how filing volume has moved year over year, and which IPC subclasses carry the claim density.
A decade past its peak
Filings ran at 97 in 2017, held near 73 by the 2022 midpoint, and have thinned to 15 in 2026. Even allowing for publication lag understating the most recent years, the multi-year direction is down, not sideways.
Alloy chemistry, not coatings, carries the density
C22C alloy composition claims cover 1,924 of 2,245 records, with C22F non-ferrous treatment a distant second at 871. B22D casting process claims (521) and C23C coatings (288) sit further back, and A61L sterilising claims (111) mark where magnesium's biomedical-implant angle intersects this corpus.
Shares are the percentage of the 2,245 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Magnesium Alloys for Lightweighting with Eureka
This page is one run against one query. Ask Eureka your own question about magnesium alloys for lightweighting and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art in this space
US20050150577A1 — Magnesium alloy and magnesium alloy die casting
A magnesium alloy and a die casting produced from the alloy include an AZ91-based magnesium alloy including 6.0 to 11.0 percent by weight of aluminum, 0.1 to 2.5 percent by weight of zinc, 0.1 to 0.5 percent by weight of manganese, and strontium and at least one of calcium and antimony added in an amount sufficient to act as a grain refining agent.Filed by Advanced Technologies, Inc. and published 2005-07-14, this filing sits squarely inside the AZ91 die-casting composition space that later grain-refinement claims had to work around.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20080031765A1 | Magnesium alloy and the respective manufacturing method | 98 |
| 2 | US20040241036A1 | Medical implant for the human or animal body | 83 |
| 3 | US20130144290A1 | Magnesium alloy | 76 |
| 4 | US5143562A | Broadly applicable phosphate conversion coating composition and process | 74 |
| 5 | WO2004001087A1 | Creep resistant magnesium alloy | 73 |
| 6 | JP1997272945A | Heat resistant magnesium alloy molded member, heat resistant magnesium alloy used for the molding and molding… | 69 |
| 7 | US6139651A | Magnesium alloy for high temperature applications | 67 |
| 8 | EP0799901A1 | Heat-resistant magnesium alloy member | 61 |
| 9 | CN101078080A | 抗蠕变镁合金及其制备方法 | 59 |
| 10 | US20170268088A1 | High Conductivity Magnesium Alloy | 55 |
Citation counts reward older filings that have had more years to accumulate references inside this searched corpus — read them as markers of influence on later filers, not as a ranking of current technical merit.
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.
Put your own technology through the same analysis
Eureka on the web
When you want the answer in the next five minutes.
The agent works the prompt against patents and technical literature, citing every source.
Run your analysis now →MCP server & REST API
When it has to run inside your own pipeline.
Patent search, landscape analysis and assignee resolution as MCP tools. Drop them into any agent framework, or call REST directly.
Browse MCP servers →What the data actually indicates
Three readings of the corpus that matter more than the headline family count.
The peak has passed and the tail is thin
Filing volume fell from 97 in 2017 through a 73-filing midpoint in 2022 down to 15 in 2026. Several of the most active historical filers show zero filings in the latest tracked year, consistent with a mature claim space rather than an emerging one.
Composition claims occupy most of the map
C22C alloy-composition claims touch the overwhelming majority of records, meaning most new filers are staking incremental composition variants against dense prior art rather than opening new claim territory.
China now leads the receiving-office count
China's 542 filings edge out the United States at 483 and the EPO's 393, with Japan, PCT and Canada well behind. That ordering points to where enforcement and freedom-to-operate checks matter most going forward.
A handful of tight collaborations, otherwise fragmented
Only 10 co-assignee pairs appear at all, and one pairing accounts for 30 shared families — far ahead of the next strongest pairs at 11 and 8. Most of the corpus is filed by single assignees rather than joint ventures.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to magnesium alloys for lightweighting, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Volkswagen AG | Dead Sea Magnesium Ltd. | 30 |
| Korea Institute of Industrial Technology (KITECH) | EMK GmbH | 11 |
| Korea Institute of Industrial Technology (KITECH) | KIM SHAE K | 8 |
| Toyota Motor Corporation | Toyota Central R&D Labs, Inc. | 7 |
| Korea Institute of Industrial Technology (KITECH) | SEO JUNG HO | 6 |
| POSCO | Volkswagen AG | 5 |
| POSCO | Helmholtz-Zentrum Geesthacht / Hereon Materials Research Center | 5 |
| Volkswagen AG | Helmholtz-Zentrum Geesthacht / Hereon Materials Research Center | 5 |
The dominant co-assignee relationship in this corpus is an automaker paired with a magnesium producer, well ahead of the research-institute pairings that follow it.
Assignee activity and momentum
Historical leaders in this corpus are largely inactive in the most recent tracked year, which says more about a mature, well-claimed field than about any single company retreating.
Long-time filers have gone quiet
Multiple assignees with substantial historical filing counts, including major research institutes and industrial groups, recorded zero filings in the latest tracked year. One shows a -100% year-on-year drop from its prior activity level.
One automaker-alloy producer pairing stands apart
The strongest co-assignee relationship in the dataset links an automaker with a magnesium metal specialist across 30 shared families, well ahead of the research-institute pairings that follow at 11 and 8.
Filing activity is genuinely multi-jurisdictional
No single office dominates outright: China, the United States and the EPO each carry a substantial share of the corpus, with Japan, PCT and Canada filling out a still-meaningful tail.
| Assignee | Recent year | YoY |
|---|---|---|
| Sumitomo Electric Industries, Ltd. | 0 | — |
| Biotronik AG | 0 | — |
| Shanghai Jiao Tong University | 0 | -100% |
| Korea Institute of Industrial Technology (KITECH) | 0 | — |
| POSCO | 0 | — |
| Korea Institute of Machinery and Materials (KIMM) | 0 | — |
| Volkswagen AG | 0 | — |
| Casting Center GmbH | 0 | — |
Where to take this analysis
The dataset points to a field with dense core claims and a thinning filing rate — the next questions are about specific claim scope and where gaps remain workable.
Map the AZ91 and creep-resistant claim boundaries
Grain-refinement and creep-resistant alloy claims cluster around a small set of highly cited filings. Before drafting a new composition claim, check how close it sits to those boundaries.
Explore claim scope in EurekaTrack the jurisdictions still receiving filings
China now files ahead of the United States and the EPO in this corpus. A freedom-to-operate check limited to one office will miss where new claims are actually landing.
Run a jurisdiction check in EurekaWatch for renewed activity from quiet historical filers
Several long-time assignees show zero filings in the latest year. A sudden filing after a quiet period is worth flagging early rather than discovering it in a later search.
Set up monitoring in EurekaCommon questions about magnesium alloy lightweighting patents
The filing trend in this dataset shows annual filings falling from 97 in 2017 to 15 in 2026, with a midpoint of 73 in 2022 — a steady, multi-year decline rather than a single bad year. This pattern is typical of a field where core alloy compositions, particularly AZ91-based die-casting systems, were already heavily claimed by the mid-2010s, leaving less room for straightforward new composition filings. It does not mean magnesium alloy research has stopped; it means the easy claim space has largely been taken, and newer work is more likely to sit in adjacent processing or coating branches. Remember that the most recent years are also undercounted because publication lags filing by around 18 months.
C22C, covering alloy compositions, appears in 1,924 of the 2,245 records in this corpus, making it by far the densest classification. C22F, non-ferrous metal treatment, is a distant second at 871, followed by B22D casting process claims at 521 and C23C coatings at 288. If you are drafting a new claim, C22C composition space is the most crowded and the hardest to clear; the treatment and coating classes carry comparatively lighter claim density.
Relative to the dense C22C composition claims, several adjacent branches carry markedly fewer filings: electroplating-based corrosion barriers under C25D (67 records), extrusion and drawing processes under B21C (87 records), and rolling-process grain control under B21B (109 records). These are not empty, but they are thin compared to the 1,924-record composition core, which makes them more realistic places to stake a defensible new claim than another AZ91-family composition variant.
The corpus includes major industrial and research assignees, several of which — including large research institutes and industrial groups — show zero filings in the latest tracked year, with at least one showing a -100% year-on-year change. This does not necessarily mean these organisations have exited the field; it may reflect a shift toward continuations, licensing, or filing under different subsidiaries. Co-assignee data shows collaboration is uncommon overall, with only 10 pairs identified and one automaker-alloy producer pairing accounting for 30 shared families, far ahead of the next-strongest pairs.
US20050150577A1 claims an AZ91-based magnesium alloy die casting with specified weight-percent ranges for aluminum, zinc and manganese, plus strontium combined with calcium or antimony as a grain-refining agent. Anyone working with AZ91-family compositions using that specific grain-refiner combination and those concentration ranges needs to check this filing and its family status closely, since it sits inside one of the most heavily cited compositions in the corpus. It does not block alloy systems outside the AZ91 family or grain-refinement approaches that avoid the strontium-plus-calcium-or-antimony combination, which is one reason creep-resistant Mg-RE systems remain a more open area to explore.
Research Magnesium Alloys for Lightweighting in depth with Eureka
Go past this page: query the whole magnesium alloys for lightweighting corpus yourself, in your own scope.
Every answer comes back with patent numbers you can open.
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.