Hydrogen Transport Patents: Top Companies & Filing Trends 2026
- Filing has plateaued, not collapsed. 2021 to 2024 filings moved from 45 to 44 records, essentially flat, once the still-filling-in years beyond 2024 are set aside.
- No single company controls the field. The leader holds 49 records out of 1,074, and the top 5 combined account for just 13.7% of all records in scope — this is a fragmented landscape, not a walled garden.
- Fuel-cell and inorganic-chemistry classes dominate the claim space. H01M and C01B together touch more than a third and over a quarter of all 1,074 records respectively, leaving pressure-vessel and refining classes comparatively open.
Filing growth compares 2021 (45 records) with 2024 (44) — 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 1,074 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape covers patent families that combine hydrogen transport, distribution or storage claims with a second technical layer — hydrogen pressure control, gas purity, electrode catalyst design, stack temperature or fuel processing. That pairing is deliberate: it isolates records where moving or conditioning hydrogen is the inventive core, rather than any patent that merely mentions hydrogen in passing. The scope spans 2015 through the 2026 cut-off, giving a decade-plus view of how the field has built up its claim space.
Reading this landscape means separating two different questions: who is filing the most, and where is claim space still genuinely open. The assignee ranking answers the first. The IPC composition and white-space sections answer the second, and for a field this fragmented, the second question matters more for deciding where to file next.
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Filing trend and technology composition
The numbers below come directly from the 1,074 records in scope. Read the most recent one or two years as incomplete — publication lags filing by roughly 18 months, so any apparent drop after 2024 reflects the reporting lag rather than a real pullback.
Filing trend: a decade past its peak, now holding steady
Filings peaked in 2017 at 77 records and have since settled onto a lower, flatter plateau. The clearest complete-year comparison available is 2021 to 2024, where filings moved from 45 to 44 records — a -2% change, essentially flat rather than declining. Treat 2025 and 2026 figures as undercounts still filling in.
Technology composition: fuel cells and inorganic chemistry lead
H01M (batteries, cells and fuel cells) appears in 35.5% of all 1,074 records and C01B (non-metallic elements and inorganic compounds) in 26.8%, making these the two most heavily claimed subclasses. B01J (catalysis) and C25B (electrolytic production) follow in the mid-teens, while F17C (pressure vessels and gas storage), C10G (refining) and C22C (alloys) each sit under 10% — these lighter-claimed classes are worth a closer look before assuming the space is crowded there too.
Shares are the percentage of the 1,074 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Hydrogen Transport & Distribution Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about hydrogen transport & distribution patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
In-tank hydrogen distribution valve
A hydrogen distribution valve for alternately distributing gaseous and liquid hydrogen from a tank is disclosed. The valve housing has a gaseous hydrogen inlet, a liquid hydrogen inlet, a hydrogen outlet and a reference pressure port. A rocker valve alternately seals the gaseous and liquid inlets, with a bias mechanism and valve membrane controlling the switch based on a reference hydrogen pressure.Filed by GM Global Technology Operations, this record illustrates how dual-phase (gas/liquid) hydrogen switching is claimed at the component level rather than the system level — a pattern worth checking before designing a similar valve.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6221117B1 | Hydrogen producing fuel processing system | 607 |
| 2 | US4098960A | Fuel cell fuel control system | 239 |
| 3 | US4098959A | Fuel cell fuel control system | 223 |
| 4 | US7169489B2 | Hydrogen storage, distribution, and recovery system | 183 |
| 5 | US20040023087A1 | Hydrogen storage, distribution, and recovery system | 173 |
| 6 | US6503649B1 | Variable fuel cell power system for generating electrical power | 158 |
| 7 | US20020107140A1 | Electrocatalyst powders, methods for producing powders and devices fabricated from same | 154 |
| 8 | US5595833A | Solid oxide fuel cell stack | 150 |
| 9 | US6541676B1 | Integrated palladium-based micromembranes for hydrogen separation and hydrogenation/dehydrogenation reactions | 149 |
| 10 | US20020100836A1 | Hydrogen and oxygen battery, or hudrogen and oxygen to fire a combustion engine and/or for commerce. | 142 |
Citation counts reflect influence within this searched corpus and favour older filings; they are not a measure of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Three patterns stand out once the raw counts are read against each other: the field is fragmented at the top, the technology mix is uneven across IPC classes, and recent-year activity from several long-standing filers has gone quiet.
Leadership is real but thin
The leading assignee holds 49 records, and the top 5 combined reach only 13.7% of all 1,074 records in scope. That leaves the bulk of the field to a long tail of single- and few-filing entrants, which means a competitor analysis built around one or two household names will miss most of the active claim space.
Two classes carry the density
Fuel-cell claims (H01M) and inorganic-chemistry claims (C01B) between them touch well over half of the class mentions in this dataset, though a record can sit in both. Pressure-vessel storage (F17C) and refining (C10G) each stay under 10%, suggesting these are lighter-claimed adjacencies rather than saturated ground.
Some long-standing filers have gone quiet
Several assignees that built meaningful positions in earlier years show zero filings in the latest year tracked, a pattern distinct from a company that never filed much to begin with. It signals either a shift in R&D focus or a move to filing under a different subsidiary or naming convention worth checking separately.
A plateau, not a decline
The only complete-year comparison available shows filings essentially flat, at -2%, between 2021 and 2024. The peak year, 2017 at 77 records, is now a decade past, but nothing in the complete-year data supports describing the field as currently shrinking.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to hydrogen transport & distribution patent landscape, with the prior art for and against each one.
Who is filing, and where the gaps sit
The assignee ranking spans 100 companies with the leader holding 49 records; beyond the top handful, the field spreads thin. That thinness is itself the finding — it means freedom-to-operate analysis needs to check the long tail, not just the recognisable names.
A leader without a lock
The top-ranked assignee's 49 records are the largest single position in the dataset, but they represent a small fraction of the 1,074 total. No single company's portfolio forecloses the field.
Concentration flattens quickly past the leader
Fifth place holds 20 records and tenth place holds 18 — a shallow drop-off that shows the field does not have a steep hierarchy. Combined, the ten leading assignees still account for only 22.2% of all records in scope.
Co-filing is rare in this dataset
Only two co-assignee pairings appear across the full record set, one of them repeated across several filings. Joint filing is not how this field typically moves; most records carry a single assignee.
| Assignee | Recent year | YoY |
|---|---|---|
| Albemarle Corp | 0 | -100% |
| Nuvera Fuel Cells LLC | 0 | — |
| MARATHON PETROLEUM COMPANY LP | 0 | — |
| Cabot Corp | 0 | — |
| Sanyo Electric Co., Ltd. | 0 | — |
| Honeywell International Inc. | 0 | — |
| Sekisui Chemical Co., Ltd. | 0 | — |
| CoorsTek Membrane Sciences AS | 0 | — |
Turning this landscape into a filing decision
The tables and charts on this page show what the corpus contains. The questions below are the ones a filing or freedom-to-operate decision actually depends on, and they need the underlying claims, not just the aggregate counts.
Check freedom-to-operate before drafting
The most-cited records in this dataset set the boundaries other filers have worked around for years. Reading their claims directly, rather than their abstracts, is the only way to know whether a new design clears them.
Run a claim check in EurekaConfirm the white space holds up
Lower IPC density in pressure-vessel storage or refining-integrated recovery may reflect genuine openness, or it may reflect this search string missing adjacent terminology. Either way it needs a second, narrower search before a claim is drafted against it.
Expand the search in EurekaCommon questions about hydrogen transport and distribution patents
The leading assignee in this dataset holds 49 records out of 1,074 in scope, which is the largest single position but still a small share of the field. The top 5 assignees combined reach only 13.7% of all records, and the top 10 reach 22.2%. That spread means the field is led rather than dominated, with a long tail of companies each holding a handful of filings.
The most reliable complete-year comparison, 2021 to 2024, shows filings essentially flat, moving from 45 to 44 records, a -2% change. The overall peak was 2017 at 77 records, well before this recent plateau. Figures for 2025 and 2026 look lower still, but that reflects publication lag of roughly 18 months rather than an actual drop in filing activity, so they should not be read as a slowdown yet.
Fuel-cell related claims under IPC class H01M appear in 35.5% of all 1,074 records, the single largest technology grouping, followed by non-metallic element and inorganic compound chemistry under C01B at 26.8%. Catalysis (B01J) and electrolytic production (C25B) each sit in the mid-teens percentage range. Pressure-vessel storage, refining, and alloy classes are all claimed in under 10% of records, marking them as comparatively lighter-claimed technology branches.
Based on IPC class density, pressure-vessel and gas storage claims (F17C), refining-integrated hydrogen recovery (C10G), and alloy-based embrittlement resistance (C22C) all show lower filing density than the fuel-cell and inorganic-chemistry classes that dominate the field. That lower density is a starting signal, not a guarantee of openness — it is worth a narrower, targeted search before committing to a claim strategy in any of these branches.
The United States receives the largest share of filings in this dataset at 385 records, followed by the European Patent Office at 148 and the WIPO/PCT route at 144. Japan, Canada and Australia follow at smaller but still notable volumes. The US lead suggests that a freedom-to-operate check for this technology should prioritise US prosecution history, though the strong PCT and EPO presence means multi-jurisdiction filing is common enough to warrant checking both routes.
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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.