PEM Fuel Cell MEA Patents: Top Companies & Filing Trends 2026
A data-led view of PEM fuel cell membrane electrode assembly patents: who leads filings, how concentrated the field is, which claim routes are crowded, and where white space remains through 2026.
Filing growth = 2021 (5 records) → 2024 (4); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 425 records in scope (CR5), not the ranked leaders only.
What this dataset covers
This landscape covers 425 published records tagged to PEM fuel cell membrane electrode assembly technology under IPC class H01M8, filed between 2015 and the 2026 data cut-off. The scope is narrow by design: the search string isolates records that explicitly discuss a membrane electrode assembly in a PEM fuel cell context, rather than fuel cell technology broadly, so the assignee ranking and technology composition below describe a claim space that is smaller and more concentrated than the fuel cell field as a whole. Publication lags filing by roughly 18 months, so the final one or two years in any trend chart will always look thinner than they eventually turn out to be.
Read the ranking and the IPC breakdown together, not separately. A company sitting near the top of the assignee table has staked claims across the record count shown; the technology composition table shows how much of that activity sits inside core H01M fuel-cell claims versus spilling into adjacent classes like coating processes or polymer processing. Where a class share is small, that is not necessarily a gap — it may simply be claimed elsewhere in a related search. Where it is near-absent, that is where a first-filer position is still available.
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Filing trend and technology composition
Three views of the same 425 records: how filing volume has moved year over year, how concentrated ownership is among the ranked assignees, and how claims distribute across IPC subclasses.
Filing trend, 2017-2026
Filings rose to a peak of 10 records in 2018, then eased. Comparing the two most recent complete years, 2021 (5 records) to 2024 (4 records) works out to a -20% change — a cooling, not a collapse, and not yet a verdict on 2025 or 2026 given publication lag.
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.
Technology composition by IPC subclass
Every record in scope carries an H01M classification by construction (100.0% of 425 records). The next largest classes are far smaller: electrolytic production of compounds (C25B) at 3.3%, catalysis-related B01J at 2.4%, and filtration, coating, laminate and polymer-processing classes each under 1.5% of records. Because a record can carry more than one class, these shares are read individually against the 425-record base, not summed.
Shares are the percentage of the 425 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on PEM Fuel Cell Membrane Electrode Assembly Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about pem fuel cell membrane electrode assembly patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art and a representative filing
US8124261B2 — Process for recycling components of a PEM fuel cell membrane electrode assembly
The membrane electrode assembly (MEA) of a PEM fuel cell can be recycled by contacting the MEA with a lower alkyl alcohol solvent which separates the membrane from the anode and cathode layers of the assembly. The resulting solution containing both the polymer membrane and supported noble metal catalysts can be heated under mild conditions to disperse the polymer membrane as particles and the supported noble metal catalysts and polymer membrane particles separated by known filtration means.Filed by BASF Corporation, granted 2012-02-28. Notable for claiming end-of-life recovery rather than assembly or performance — a different stage of the MEA lifecycle from most of the crowded claim territory.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6280865B1 | Fuel cell system with hydrogen purification subsystem | 308 |
| 2 | US20040197638A1 | Fuel cell electrode comprising carbon nanotubes | 286 |
| 3 | US6350539B1 | Composite gas distribution structure for fuel cell | 198 |
| 4 | US6020083A | Membrane electrode assembly for PEM fuel cell | 177 |
| 5 | US6074692A | Method of making MEA for PEM/SPE fuel cell | 173 |
| 6 | US6207312B1 | Self-humidifying fuel cell | 150 |
| 7 | US5945232A | PEM-type fuel cell assembly having multiple parallel fuel cell sub-stacks employing shared fluid flow plate a… | 144 |
| 8 | US6503653B2 | Stamped bipolar plate for PEM fuel cell stack | 131 |
| 9 | US6541147B1 | Printed circuit board separator for an electrochemical fuel cell | 101 |
| 10 | US6582842B1 | Enhancement of proton exchange membrane fuel cell system by use of radial placement and integrated structural… | 94 |
Citation counts reflect the age of a record inside this corpus as much as its current relevance — older foundational filings accumulate citations that a newer, technically superior filing has not yet had time to earn.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the concentration and citation data imply
Four read-throughs from the ranking, the trend and the citation table that matter for a filing or licensing decision.
The top of the field is genuinely concentrated
The leading assignee alone holds 48 records, and the top 5 combined account for 32.2% of all 425 records in scope. That is enough concentration that a new entrant filing broad MEA-assembly claims should expect to run into prior art from a small set of holders before looking anywhere else.
Below the leaders, ownership fragments quickly
Fifth place holds 17 records and tenth place holds 15 — a fast drop-off from the 48-record leader. Past the top 10 (51.3% of all 425 records combined), the ranking runs long and thin, meaning most of the remaining claim space is held in small, single-digit blocks rather than by a second tier of large holders.
Volume has eased from its 2018 peak
2018 was the peak filing year so far at 10 records. Comparing 2021 to 2024, the count moved from 5 to 4 records, a -20% change. That reads as a maturing, narrowly-scoped claim area rather than a growing one — useful context before assuming this is still an open land grab.
Almost everything sits inside H01M
Every record carries an H01M classification, and the next-largest class, electrolytic production of compounds (C25B), covers only 3.3% of the 425 records. Coating processes, polymer processing and shaping of plastics each sit under 1.5%. That thin spillover is itself informative: adjacent manufacturing and materials claims around the MEA are lightly filed relative to the core assembly claims.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to pem fuel cell membrane electrode assembly patent landscape, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Ballard Power Systems | MCLEAN GERARD FRANCIS | 18 |
| Siemens | Sendtec / Emitting Technology Co., Ltd. | 6 |
| Ballard Power Systems | Johnson Matthey plc (UK) | 4 |
| Ballard Power Systems | REID CHRISTOPHER EDWIN JOHN | 2 |
| Ballard Power Systems | LINDSTROM JEREMY | 2 |
| Ballard Power Systems | DJILALI NED | 2 |
| Ballard Power Systems | CRANE PATRICIA | 2 |
| UTC Power Corp | VAN DINE LESLIE L | 2 |
Ten co-assignee pairs appear in the dataset. The strongest pair recurs at 18 shared records, well ahead of the next pairs at 6 and 4 — evidence of one long-running joint filing relationship rather than a broadly collaborative field.
Where to take this analysis
The ranking and IPC breakdown answer who and how much. Deciding where to file next, or whether a specific claim is safe to design around, needs a closer read of the underlying claims.
Map the white space by claim language
Use the thin IPC branches — coating processes, polymer processing, laminate structures — as a starting point and pull the actual independent claims sitting there before assuming the space is genuinely open.
Explore white space in EurekaCheck freedom-to-operate against the top holders
With the top 5 assignees covering 32.2% of all 425 records, any new MEA assembly or catalyst-layer filing should be checked against their granted claims first, not the full ranked list.
Run a freedom-to-operate check in EurekaWatch the 2024-2026 filings as they publish
Given the roughly 18-month publication lag, the most recent filing years will keep filling in. Revisit the trend once 2025 settles before drawing conclusions about slowing activity.
Track new filings in EurekaCommon questions about this landscape
One assignee leads the ranked field with 48 records out of 425 in scope, well ahead of fifth place at 17 and tenth place at 15. The top 5 combined account for 32.2% of all 425 records, so ownership is concentrated at the very top but drops off quickly after that. Past the top 10, which together hold 51.3% of the field, the remaining 90 ranked companies each hold comparatively small blocks, so a full picture requires checking the ranked table rather than assuming one or two players cover the space.
The peak filing year so far is 2018 at 10 records, and the most recent complete comparison, 2021 to 2024, shows a -20% change. That points to a cooling rather than a growing field, at least through the last fully-published year. Figures for 2025 and 2026 are still incomplete because publication typically lags filing by around 18 months, so it is too early to call the current trajectory definitively falling.
Every record in this dataset carries an H01M classification by construction, since that is the scope filter. The next-largest overlapping class is C25B, electrolytic production of compounds, at 3.3% of the 425 records, followed by catalysis-related B01J at 2.4%. Filtration, coating, laminate structures and polymer processing each sit under 1.5%, meaning claim activity outside the core fuel-cell class is thin across the board rather than concentrated in one adjacent field.
US8124261B2, assigned to BASF Corporation and granted in 2012, claims a process for recycling components of a PEM fuel cell membrane electrode assembly by dissolving it in a lower alkyl alcohol solvent to separate the membrane from the catalyst layers, then recovering the polymer and noble-metal catalyst by filtration. It sits at the end-of-life recovery stage of the MEA lifecycle rather than at assembly, manufacturing or performance, which is where most of the crowded claim territory in this dataset sits. Anyone working on catalyst or membrane recovery from spent MEAs should review its claims closely, but it does not block ordinary assembly or catalyst-layer filings.
The IPC composition data points toward adjacent manufacturing classes — coating processes, polymer processing, laminate structures and plastics shaping — each covering well under 1.5% of the 425 records, against near-total saturation in the core H01M fuel-cell class. That gap does not guarantee an easy filing, since related art may sit in classes just outside this dataset's scope, but it is a reasonable starting point for a freedom-to-operate check before drafting new claims around MEA manufacturing methods rather than assembly composition.
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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.