PEM Electrolyzer Membrane Patent Snapshot 2026
The PEM electrolyzer membrane patent space is in a growth stage with 16 patent families in scope, led by ACS Industries Inc. with 4 patent families. Activity is highly concentrated among a small cohort of new entrants, with filing momentum accelerating since 2021 and the dominant jurisdiction split evenly between China and the United States.
ACS Industries leads a small, fast-growing field dominated by new entrants
The Lubrizol Corporation and the Netherlands Organisation for Applied Scientific Research (TNO), each with 3 patent families. Ohmium International Inc. ranks fourth with 2 patent families, and the remaining applicants hold 1 patent family each.
The top five filers account for 76% of the combined total across the ranked applicants visible in this query, signaling a highly concentrated field where a handful of organizations define the current technical agenda. The tier gap between the top two groups is narrow, which is characteristic of an early-growth market where leadership has not yet consolidated.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | ACS Industries Inc. | 4 | |
| 2 | The Lubrizol Corporation | 3 | |
| 3 | Netherlands Organisation for Applied Scientific Research (TNO) | 3 | |
| 4 | Ohmium International Inc. | 2 | |
| 5 | SIEMENS ENERGY GLOBAL GMBH & CO KG | 1 | |
| 6 | Guangdong Cavolo Hydrogen Technology Co., Ltd. | 1 | |
| 7 | Siemens AG | 1 | |
| 8 | Shenzhen Lishi Hydrogen Health Technology Co., Ltd. | 1 | |
| 9 | Hoeller Electrolyzer GmbH | 1 |
The leading positions of ACS Industries and Lubrizol — both primarily materials and industrial companies rather than pure-play electrolyzer OEMs — suggest that membrane material and coating innovations are the primary competitive battleground, rather than system-level electrolyzer architecture.
Filing counts for the most recent 18–24 months are understated due to publication lag; the true scope of recent activity is likely higher than current records reflect. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing activity surged from 2021 onward; electrolytic production dominates the technology mix
Two charts frame the competitive dynamics: annual filing volume over time and the distribution of activity across IPC technology branches. Together they reveal both the pace of growth and the areas where technical effort is concentrated or sparse.
Annual filing trend
Filings were negligible from 2017 through 2020, with a notable surge to 5 families in 2021, followed by a quieter 2022–2023 period, and then a second peak of 6 families in 2024. The 60% recent-window growth confirms the field is in a genuine expansion phase. The 2025 and 2026 data points are materially understated due to patent publication lag and should not be read as a slowdown.
↗ Hover for values · click a bar to ask EurekaTechnology composition
C25B (electrolytic production of compounds) is visible in the IPC mix with 18 patent records, reflecting the core focus on electrochemical cell and membrane-electrode assembly design. C23C (coating and surface deposition) and B22F (powder metallurgy) appear as secondary branches, while C21B (iron production) and H01M (batteries, cells, and fuel cells) each account for only 1 patent record, marking them as sparse adjacent areas.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Proton exchange membrane electrolyzer
A proton exchange membrane (PEM) electrolyzer for breaking down water to hydrogen and oxygen comprises a titanium anode, a catalyst-coated membrane, a titanium cathode, and a power source. The titanium anode is configured to receive water from a water source. The titanium anode liberates oxygen and protons. The catalyst-coated membrane is operably connected… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Porous electrolyzer gas diffusion layer and method… | 24 |
| 2 | Proton exchange membrane electrolyzer | 10 |
| 3 | Porous electrolyzer gas diffusion layer and method… | 4 |
| 4 | 膜电极框架组件及PEM电解堆 | 3 |
| 5 | Method for providing a substrate for an electroche… | 3 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
ACS Industries Inc.
ACS Industries Inc. holds 4 patent families, the largest portfolio in this landscape. Its technical focus spans C25B 13 (diaphragms and membranes for electrolytic cells) and C25B 9 (electrolytic cell apparatus), indicating a dual emphasis on membrane materials and cell-level integration. Momentum is classified as a new entrant, meaning its recent filings represent the entirety of its tracked position in this field.
4 patent familiesThe Lubrizol Corporation
The Lubrizol Corporation holds 3 patent families, tied with TNO for second place. Its focus covers C25B 1 (electrolysis of inorganic compounds), C25B 11 (electrodes for electrolytic processes), and C25B 13 (diaphragms and membranes), reflecting a broader electrochemical materials approach. Like ACS Industries, Lubrizol is tracked as a new entrant, with all 3 recent families constituting its current position.
3 patent familiesFrequently asked questions
The current evidence set contains 16 patent families in scope covering PEM electrolyzer membrane technology.
ACS Industries Inc. leads with 4 patent families, followed by The Lubrizol Corporation and the Netherlands Organisation for Applied Scientific Research (TNO), each with 3 patent families.
The field is in the Growth stage. Annual filings are still rising, with a 60% recent-window growth rate. The surge in activity began around 2021, and the 2024 cohort represents the largest single-year count recorded.
China and the United States are tied as the leading filing offices, each with 4 patent records. Europe (EPO) and WIPO (PCT) follow with 3 records each, indicating that visible assignees are pursuing broad international protection.
C25B (electrolytic production of compounds) is visible in with 18 patent records. C23C (coating and surface deposition) is a secondary branch with 3 records, and B22F (powder metallurgy) holds 2. H01M and C21B are the sparsest branches with 1 record each.
No co-applicant filings are recorded in the current evidence. All identified filers appear to be building independent proprietary positions, with no consortium or joint-development patent activity detected.
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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.
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