Fuel Cell & Alt-Fuel Machine Patents: Who Leads, Where the Gaps Are 2026
- One assignee holds 37 of 47 records and the top five together account for 95.7% of all 47 records in scope — this field is concentrated, not fragmented.
- Filing peaked in 2024 at 29 records after starting from zero in 2017, with the most recent year understated by publication lag.
- Lubricant chemistry, not fuel-cell hardware, dominates the claims C10M and C10N classes cover 78.7% and 63.8% of records respectively, far ahead of engine control or battery-related classes.
Top-5 share is the combined record count of the five largest assignees divided by all 47 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset tracks patent families at the intersection of fuel cell and hydrogen-fuelled machine platforms and the operating conditions that determine whether they survive the field: onboard hydrogen storage, refuelling interfaces, power density, cold-start capability, dust ingress durability and vibration tolerance. The search string pairs a hydrogen or fuel-cell machine concept with at least one of these durability or interface constraints, so the corpus skews toward records where hydrogen combustion or storage is claimed alongside a practical operating requirement rather than as a standalone chemistry.
Across 47 records filed between 2015 and the 2026 cut-off, the claim activity is not evenly spread between hardware and chemistry. A large share of the corpus sits in lubricant composition and lubricant-property classes rather than in fuel-cell stack or storage-tank hardware, which tells a reader where the active claim-writing has actually concentrated inside this search space.
Filing trend and technology composition
Two views of the same 47 records: how filing activity has moved year over year, and which IPC subclasses the claims actually sit in.
Filing trend, 2017–2026
Filings moved from zero in 2017 to a peak of 29 records in 2024, with 10 records recorded in the most recent year to date. Because publication typically lags filing by about 18 months, the most recent year's count is understated and should not be read as a slowdown.
IPC subclass composition
C10M (Lubricants) and C10N (Lubricant properties) together dominate the corpus at 78.7% and 63.8% of the 47 records respectively, with C01B, F02D, H01M, E21B, F02B and F02G each appearing in single-digit-percentage shares. Records can carry more than one class, so these shares sum to well over 100% and should be read as claim overlap, not as a partition of the field.
Shares are the percentage of the 47 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Fuel Cell and Alternative Fuel Machines with Eureka
This page is one run against one query. Ask Eureka your own question about fuel cell and alternative fuel machines and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records in this landscape
Methods and systems for a vehicle (US11248542B2)
Methods and systems are provided for a hydrogen combustion engine. In one example, a method may include operating the hydrogen combustion engine at one of two combustion air ratios, wherein a combustion air ratio between the two is avoided via adjusting one or more operating parameters.Filed by Ford Global Technologies, LLC; granted 2022-02-15.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20210062738A1 | Methods and systems for a vehicle | 17 |
| 2 | US11248542B2 | Methods and systems for a vehicle | 3 |
| 3 | WO2025126140A1 | Lubricant compositions containing group i and/or group ii base stock for use in hydrogen fueled engines | 2 |
| 4 | WO2025126141A1 | Lubricant compositions containing ethoxylates for use in hydrogen fueled engines | 1 |
| 5 | WO2025126139A1 | Lubricant compositions containing aromatic amines for reduced abnormal combustion events in hydrogen fueled e… | 1 |
| 6 | WO2025126135A1 | Lubricant compositions containing borated dispersant and/or other boron containing compounds for reduced abno… | 1 |
| 7 | WO2025126136A1 | Lubricant compositions containing olefin polymers for reduced pre-ignition in hydrogen fueled engines | 1 |
| 8 | WO2025126142A1 | Lubricant compositions containing organoammonium tungstates for use in hydrogen fueled engines | 1 |
| 9 | US20250197765A1 | Lubricant Compositions Containing Phosphorus For Use In Hydrogen Fueled Engines | 1 |
| 10 | US20250197763A1 | Lubricant Compositions Containing Silicon For Reduced Pre-ignition In Hydrogen Fueled Engines | 1 |
Citation counts are drawn from within this searched corpus and favour older records; treat them as a signal of influence rather than of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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The filing pattern and class distribution point to a field where one company set the claim boundaries early, and where the busiest recent activity is in a narrow chemistry niche rather than in machine hardware.
A five-player field, functionally
With the leader alone holding 37 of 47 records and the top five combined reaching 95.7% of all records in scope, this is not a fragmented emerging space. A new entrant is filing into ground that a small number of parties have already staked out.
One assignee is still accelerating
The leading assignee filed 9 records in the latest year, up 200% year over year, while several other ranked assignees show zero latest-year activity. Recent momentum is not evenly distributed across the ranked leaders.
Lubricant chemistry outweighs stack hardware
C10M lubricant claims cover 78.7% of the 47 records, while H01M battery and fuel-cell hardware claims cover only 6.4%. Anyone assuming this search space is primarily about fuel-cell stack design should recheck that assumption against the class distribution.
International filing route leads
WIPO (PCT) receives the largest single share of filings at 15, ahead of the United States at 13, India at 10 and Canada at 9, suggesting applicants are routing through international phase before committing to national filings.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to fuel cell and alternative fuel machines, with the prior art for and against each one.
Who is filing, and where the gate sits
Seven assignees account for the entire ranked set, with activity heavily skewed toward one company's lubricant-chemistry programme.
One assignee dominates the ranking
The leading assignee holds 37 of the 47 records in this dataset, with recent-year filings still rising at 200% year over year. That combination of scale and momentum makes it the reference point for any freedom-to-operate check in this space.
A steep drop after the top few
Fifth place in the ranking holds only 2 records, and the top seven together account for 100.0% of all 47 records in scope. There is no unranked long tail here — every record in the dataset belongs to one of these seven parties.
Activity has stalled outside the leader
Several ranked assignees, including one showing a -100% year-over-year change, recorded zero filings in the latest year. Recent activity in this dataset is effectively a single-company story.
| Assignee | Recent year | YoY |
|---|---|---|
| Infineum International Limited | 9 | +200% |
| MUTHU KANNAN L | 1 | — |
| Ford Global Technologies, LLC | 0 | — |
| Tenneco Inc. | 0 | — |
| Halliburton Energy Services, Inc. (US) | 0 | — |
| TÖRÖK ARPAD | 0 | -100% |
| Hydro Genics Technologies Limited | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, white-space filing, or tracking a single competitor.
Run a freedom-to-operate check against the leader
With one assignee holding 37 of 47 records and still filing at pace, any new hydrogen combustion or lubricant-chemistry claim should be checked against that portfolio specifically, not just against the field average.
Check claims in Eureka →Explore the under-claimed hardware branches
Onboard storage, refuelling interfaces and cold-start control each carry only single-digit shares of the 47 records, despite being named directly in the search scope. That gap is worth a closer read before assuming it is saturated.
Explore white space in Eureka →Track the momentum shift as it happens
Recent-year filing is concentrated almost entirely in one assignee's programme while others have gone quiet. Watching whether that pattern holds through the next publication cycle will tell you if this is consolidation or a temporary lull.
Set up monitoring in Eureka →Common questions about this landscape
One assignee leads with 37 of the 47 records in this dataset, and the top five assignees combined account for 95.7% of all 47 records in scope. This is a concentrated field rather than a fragmented one: seven ranked assignees cover 100.0% of the records, so there is no meaningful unranked long tail to search beyond them. Anyone doing competitive tracking in this space should start with the leader's portfolio before broadening out.
Filing rose from zero recorded records in 2017 to a peak of 29 in 2024, with 10 records recorded so far in the most recent year. A precise growth rate is not calculable here because fewer than four complete years remain once the typical 18-month publication lag is accounted for. The visible trend is upward through 2024, but the most recent year's figures will keep rising as more filings publish.
Despite the search scope naming fuel cells and hydrogen machines directly, the largest technology classes in the 47 records are C10M (Lubricants) at 78.7% and C10N (Lubricant properties) at 63.8%. Fuel-cell and battery hardware under H01M appears in only 6.4% of records, and engine control (F02D) and non-metallic compounds (C01B) each sit around 10.6%. This means the active claim-writing in this dataset is concentrated on lubricant chemistry for hydrogen-fuelled engines rather than on fuel-cell stack or storage hardware.
US11248542B2, assigned to Ford Global Technologies, LLC, claims methods for operating a hydrogen combustion engine across two combustion air ratios while avoiding an intermediate ratio band through adjustment of operating parameters. It is one of the most-cited records in this dataset, alongside its related family member US20210062738A1. Anyone designing hydrogen combustion control logic that touches air-ratio management should review its specific claim language rather than assume the broader concept is open, since the claim scope is narrower than the general idea of hydrogen combustion control.
The IPC composition shows onboard hydrogen storage, refuelling interfaces, cold-start ignition control and dust ingress durability are all named in the search scope but appear only in single-digit-percentage shares of the 47 records, well behind the lubricant chemistry classes. That gap suggests these hardware and interface areas are under-claimed relative to how central they are to the underlying technical problem. A first claim in one of these branches would need to tie specific hardware or control-logic detail to the named operating condition, since generic hydrogen-machine claims risk overlapping the dominant lubricant-chemistry filings.
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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.