DMFC Bipolar Plate Patents: Filing Trends & Where Activity Sits 2026
- Filing has cooled since its 2019 peak. Seven records filed that year against a flat-to-declining trend since, with the midpoint year 2022 down to two — this is a mature, narrowly claimed niche, not a growth area.
- China dominates the filing venue. Forty of the tracked records were filed there against single digits everywhere else, so freedom-to-operate analysis has to start with the Chinese register.
- Co-filing is almost non-existent. Only two co-assignee pairs appear across 48 families, meaning most bipolar-plate IP here sits with a single owner rather than joint ventures or research consortia.
What this landscape covers
Direct methanol fuel cells (DMFC) rely on a bipolar plate to route fuel and oxidant, manage water and carbon dioxide byproduct, and resist methanol-driven corrosion at the anode. This landscape tracks patent families filed against flow-field geometry, methanol-compatible coatings and corrosion-resistant plate constructions, filtered to the core fuel-cell IPC classes H01M8/0206, H01M8/0208 and H01M8/1011.
The corpus covers 48 patent families published between 2015 and mid-2026. Filing activity peaked in 2019 and has since flattened, which is consistent with a subfield where the dominant plate architectures — metal-coated bipolar plates and composite flow-field designs — are already well claimed rather than still being defined.
Filing trend and technology mix
Two views matter here: how filing volume has moved year over year, and which IPC subclasses the records actually sit in once you look past the H01M core.
A 2019 peak followed by a flat tail
Filings rose to 7 in 2019, the high point of the tracked period, then settled into a flat-to-declining pattern through the 2022 midpoint of 2 filings. The 2026 figure of 0 reflects the publication lag inherent to patent data rather than a sudden stop in R&D — filings made in the last 12-18 months will not have published yet.
Concentrated almost entirely in H01M
Forty-seven of the 48 families classify under H01M (batteries, cells and fuel cells), with only single-digit spillover into MEMS microstructures (B81B), electrolytic production (C25B), non-portable lighting (F21S) and capacitors (H01G). That spillover is worth checking individually — it usually marks a plate design borrowed from, or licensed into, an adjacent hardware category rather than a new fuel-cell mechanism.
Shares are the percentage of the 48 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Direct Methanol Fuel Cell Bipolar Plate with Eureka
This page is one run against one query. Ask Eureka your own question about direct methanol fuel cell bipolar plate and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records in this corpus
US20220246963A1 — Direct methanol fuel cell and method of operation
A direct methanol fuel cell includes a cathode electrode, an anode electrode and a membrane located between the anode electrode and the cathode electrode. An anode hydrophilic microporous plate (HMP) is located at an anode side of the fuel cell. The anode HMP has a front side and a back side opposite the front side, and the front side is positioned closer to the anode electrode than the back side. An anode gas diffusion layer is located in an anode chamber defined between the anode electrode and the anode HMP. A flow of methanol fuel is introduced into the back side of the anode hydrophilic microporous plate or to the anode chamber.Filed by Hamilton Sundstrand, 2022-08-04 — one of only two US-filed records in this corpus.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | DE10017058A1 | Bipolar plate used for a PEM fuel cell stack is made from a first metal with a metallic coating of a second m… | 17 |
| 2 | CN1595703A | 微型液体甲醇燃料电池的制造方法 | 14 |
| 3 | CN206422153U | 用于直接甲醇燃料电池的亲疏水复合流场板 | 9 |
| 4 | CN109980245A | 一种直接甲醇燃料电池中双极板与膜电极的密封方法 | 7 |
| 5 | CN109390603A | 一种波纹流场板 | 7 |
| 6 | CN105932313A | 用于直接甲醇燃料电池的亲疏水复合流场板及其制备方法 | 6 |
| 7 | CN205723784U | 一种使用集电‑扩散复合层的直接甲醇燃料电池 | 6 |
| 8 | CN110957501A | 用于甲醇燃料电池的双面十字交错多孔流场板及制备方法 | 5 |
| 9 | CN109560312A | 一种适用于高浓度甲醇的微型燃料电池及其放电方法 | 5 |
| 10 | CN209001026U | 一种波纹流场板 | 4 |
Citation counts here reflect influence within the searched corpus and skew toward older filings; a high count marks a record other applicants had to design around, not necessarily one still commercially central.
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 this subfield
Read together, the filing trend, the venue split and the citation table point to a niche where the core mechanical problem is well covered and most remaining activity is incremental.
Growth has already plateaued
The subfield's single filing peak occurred in 2019; the count at the 2022 midpoint had already halved. That pattern is typical of a technology whose primary architectures are settled and where new filings are refinements rather than fresh mechanisms.
China is the venue that matters most
With India, Germany, the US and the EPO each in single digits, most freedom-to-operate risk and most prior art on plate geometry and coatings sits in the Chinese patent register, not in Western filings.
Ownership is fragmented, not pooled
Almost no families here are jointly held. University-industry pairs such as South China University of Technology with Foshan Desina Technology are the exception rather than the rule, suggesting most plate IP was developed and filed by a single institution or company acting alone.
Older metal-coating art still anchors the field
The most-cited record describes a metal bipolar plate with a metallic coating for a PEM stack — general fuel-cell art rather than DMFC-specific, but still the reference point later filings had to distinguish from on corrosion resistance.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to direct methanol fuel cell bipolar plate, with the prior art for and against each one.
Who holds the filings
Filing activity is led by Chinese universities and research institutes rather than component manufacturers, with a handful of corporate names — including one non-Chinese entrant — appearing further down the list.
Research institutes outnumber manufacturers
Names such as South China University of Technology, Harbin Institute of Technology and the Dalian Institute of Chemical Physics recur across the ranking, pointing to a field still largely worked through academic and state-research channels rather than mass-production suppliers.
No current leader is actively filing
Every one of the most active historical assignees — from South China University of Technology to Hamilton Sundstrand — shows zero filings in the latest tracked year, consistent with the corpus-wide plateau rather than any single firm pulling back.
Hamilton Sundstrand is the notable outlier
Most assignees are Chinese academic or research bodies; Hamilton Sundstrand's 2022 filing on an anode hydrophilic microporous plate is the clearest non-Chinese, non-academic entry in the tracked set.
| Assignee | Recent year | YoY |
|---|---|---|
| South China University of Technology | 0 | — |
| Harbin Institute of Technology | 0 | — |
| Dalian Institute of Chemical Physics, Chinese Academy of Sciences | 0 | — |
| Suzhou Aojiahua New Energy Co., Ltd. | 0 | — |
| Chengde Petroleum College | 0 | — |
| Hamilton Sundstrand Corporation | 0 | — |
| Nan Ya PCB Corporation | 0 | — |
| Foshan Desina Technology Co., Ltd. | 0 | — |
Where to take this analysis
The filing trend and ownership pattern here suggest a field where the remaining opportunity is in specific mechanical refinements rather than broad architecture claims.
Map the coating and corrosion-resistance claims in detail
DE10017058A1's citation count shows metal-coating claims are the anchor prior art in this space; any new corrosion-resistant plate design should be checked against it and its citing family before drafting.
Run a claim chart in EurekaWatch the under-claimed flow-field variants
Corrugated and hydrophilic-hydrophobic composite flow-field designs show up as cited records but not as a dense cluster — a workable entry point for a narrower, defensible claim.
Explore white space in EurekaTrack dormant assignees for reactivation
Every leading filer shows zero activity in the latest year; a sudden new filing from any of them is worth flagging early rather than after publication.
Set up assignee alerts in EurekaCommon questions on DMFC bipolar plate patents
Most filings in this corpus claim either the flow-field geometry that routes methanol fuel and carbon dioxide byproduct across the plate face, or a coating and material construction that resists methanol-driven corrosion at the anode. A smaller group claims sealing methods between the plate and the membrane electrode assembly. Very few claims cover the fuel cell system as a whole — the plate itself is the unit of novelty.
Filing peaked at 7 records in 2019 and has been flat or declining since, with the 2022 midpoint down to 2. That pattern typically means the core mechanical problem — corrosion resistance and flow distribution — is already well covered by existing claims, so new filers are working narrower refinements rather than foundational designs. Publication lag also means the most recent one to two years understate true filing activity.
China accounts for 40 of the 48 tracked records, far ahead of India, Germany, the United States and the European Patent Office, which each contribute only a handful. Any freedom-to-operate or prior-art search on this topic needs to prioritise the Chinese patent register, since a search limited to Western offices would miss most of the relevant art.
Universities and state research institutes dominate the assignee list, including South China University of Technology, Harbin Institute of Technology and the Dalian Institute of Chemical Physics. Corporate filers are a minority, and joint filings between industry and academia — such as South China University of Technology with Foshan Desina Technology — are rare, appearing in only two co-assignee pairs across the entire corpus.
US20220246963A1, filed by Hamilton Sundstrand in 2022, claims an anode hydrophilic microporous plate positioned between the anode electrode and an anode gas diffusion layer, with methanol fuel introduced to the plate's back side or the anode chamber. Anyone designing a similar dual-sided anode plate structure with directed fuel flow should review this claim scope closely, since it is one of only two US filings in this corpus and sits in relatively uncrowded territory outside China.
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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.