Offshore Hydrogen Production Patents: Leaders & Filing Trends 2026
A data-backed view of offshore hydrogen production patents: who holds the most families, how filings grew, and where technology claims concentrate across marine and offshore engineering IPC classes through 2026.
Filing growth = 2021 (5 records) → 2024 (21); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 67 records in scope (CR5), not the ranked leaders only.
What the offshore hydrogen production patent record shows
Offshore hydrogen production sits at the intersection of marine engineering and electrolytic chemistry, and the patent record reflects that split. 67 published records fall within scope across the 2015–2026 window, filed against ships, hulls and platform structures (IPC class B63B) as often as against the electrolysis equipment itself (C25B). That pairing is the defining feature of this landscape: a claim rarely covers just a floating hull or just an electrolyser stack, but frequently ties the two together as a single system.
Filing activity was negligible before 2021 and rose sharply through 2024, the last year with a complete publication record. Receiving-office data shows China leading by volume, with the United States, WIPO/PCT, Europe, the United Kingdom and Australia following at smaller but still active levels — evidence that filers are already building multi-jurisdiction coverage rather than treating this as a single-market technology.
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Filing trend and technology composition
Two views of the same 67 records: how filing volume moved year over year, and which IPC subclasses carry the claims.
From near-zero to a 2024 peak
Annual filings moved from 0 in 2017 to a peak of 21 in 2024, with the 2021→2024 span alone showing +320% growth. 2025 and 2026 figures will continue to revise upward as publication catches up with filing activity roughly 18 months behind.
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.
Vessel structure and electrolysis dominate, power generation supports
B63B (ships and marine vessels) appears in 88.1% of the 67 records and C25B (electrolytic production) in 44.8%, confirming that most filings claim the offshore structure and the hydrogen-generating process together. E02B (hydraulic and waterway engineering) at 26.9% and B63J (ship auxiliaries) at 16.4% follow, with wind (F03D), solar (H02S), gas storage (F17C) and power/grid systems (H02J) each present in 11.9%–14.9% of records as supporting energy-supply and storage claims.
Shares are the percentage of the 67 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Offshore Hydrogen Production Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about offshore hydrogen production patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited offshore hydrogen production filings
WO2024184065A1 — Offshore hydrogen production (Aker Solutions, 2024-09-12)
An offshore hydrogen production platform comprising a support structure and vertically spaced decks, with hydrogen production equipment located on the uppermost deck and enclosed to isolate it from the rest of the structure. The filing also covers the method of producing hydrogen using equipment mounted on that uppermost deck.The deck-level enclosure and vertical arrangement are the structural choices worth checking against before filing a similar platform layout.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | WO2019204857A1 | Offshore energy generation system | 32 |
| 2 | US20110158370A1 | Offshore energy carrier production plant | 22 |
| 3 | WO2019180323A1 | A barge for supplementing an energy storage of a moving vessel, and an offshore energy station | 11 |
| 4 | CN215904702U | 一种基于风电的海上制氢制甲醇储舱平台 | 5 |
| 5 | US20230406716A1 | System for Offshore Production of Fuel | 3 |
| 6 | US20240034443A1 | Offshore charging station | 3 |
| 7 | CN113859461A | 一种海上大型可折展漂浮体 | 3 |
| 8 | CN118850272A | 海上制氢制氨制醇一体化平台 | 2 |
| 9 | CN118186403A | 一种海上制氢船 | 2 |
| 10 | WO2023107339A1 | Apparatus and method for green hydrogen production using submerged desalination system | 2 |
Citation counts reward older filings that have had more time to accumulate citations within this corpus; read them as a signal of influence on the field, not as a ranking of current commercial importance.
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 mean for a filing decision
Four read-outs from the same 67-record dataset, each pointing at a different decision a filer or licensor needs to make.
The top 5 hold under half the field
The top 5 assignees combined account for 46.3% of all 67 records in scope, and the top 10 for 68.7%. That is real concentration at the leading edge, but it still leaves roughly a third of filings spread across a long tail of smaller entrants — this is not a two-player market.
Filing volume accelerated sharply into 2024
Annual filings rose from 5 in 2021 to 21 in 2024, a +320% increase over that three-year span and the field's peak year to date. Treat 2025–2026 counts as provisional; publication lag of roughly 18 months means the most recent years will keep rising as more records surface.
Structure and chemistry are claimed together
B63B (marine vessels) appears in 88.1% of records and C25B (electrolytic production) in 44.8%. Because a record can carry both classes, the overlap points to a dominant claim pattern: the floating or fixed structure and the electrolysis process bundled into one filing rather than protected separately.
China leads receiving-office volume, but coverage is already global
China accounts for 23 of the tracked filings, ahead of the United States (10), WIPO/PCT (8), Europe (7), the United Kingdom (6) and Australia (3). The spread across five other offices shows filers are already pursuing multi-jurisdiction protection rather than treating any single market as sufficient.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to offshore hydrogen production patent landscape, with the prior art for and against each one.
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, licensing, or new claim drafting.
Map freedom-to-operate against the top 10
With 68.7% of records held by the top 10 assignees, any new platform-plus-electrolyser design should be checked against that group's claims before drafting, not just against the single leader.
Run a freedom-to-operate check in EurekaWatch the energy-supply subclasses
F03D, H02S, F17C and H02J each sit at 11.9%–14.9% of records — smaller than the core structure and electrolysis classes, and worth monitoring as filers start pairing renewables and storage more tightly with hydrogen platforms.
Track subclass growth in EurekaRevisit 2025–2026 counts as they fill in
Publication lag means the last two years understate real filing activity; re-pull the trend in a few months to see the true trajectory past the 2024 peak.
Set a landscape alert in EurekaCommon questions about offshore hydrogen production patents
The dataset ranks 40 assignees across 67 records, with the leading assignee holding 8 records and the fifth-ranked holding 5. The top 5 combined account for 46.3% of all 67 records, and the top 10 combined account for 68.7%, so while there is a recognisable leading group, more than a third of filings are spread across a long tail of smaller filers. No single company controls a majority of the field, which leaves room for new entrants to build a defensible position.
Filing activity was close to zero in 2017 and rose to a peak of 21 filings in 2024, with the 2021-to-2024 span alone showing +320% growth. 2024 is the most recent year that can be treated as a complete count. Figures for 2025 and 2026 will keep revising upward because patent publication typically lags the original filing by around 18 months, so the apparent slowdown in the newest years is a reporting artefact, not a real drop in activity.
The dominant IPC classes are B63B, covering ships and marine vessels, present in 88.1% of the 67 records, and C25B, covering electrolytic production of compounds, present in 44.8%. E02B (hydraulic and waterway engineering) and B63J (ship auxiliaries) follow at 26.9% and 16.4%. Supporting energy classes — wind turbines, solar power, gas storage and grid systems — each appear in roughly 12% to 15% of records, indicating that most filings bundle the offshore structure with the hydrogen-generation process rather than claiming either in isolation.
China is the leading receiving office with 23 filings, followed by the United States with 10, WIPO's PCT route with 8, the European Patent Office with 7, the United Kingdom with 6, and Australia with 3. This spread across six offices shows that filers active in this space are already pursuing protection in multiple jurisdictions rather than relying on a single home market, which is typical for offshore energy infrastructure intended for export or multinational deployment.
The most-cited record in this dataset is WO2019204857A1, 'Offshore energy generation system', cited 32 times, followed by US20110158370A1, an offshore energy carrier production plant, cited 22 times. High citation counts inside a searched corpus tend to favour older filings that have simply had more time to accumulate citations, so they are best read as a signal of influence on later filings rather than a measure of which patent is most commercially significant today.
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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.