Electrochemical Reactor Design Patent Landscape 2026
The electrochemical reactor design field is in a confirmed growth stage, with 448 patent families in scope and filings expanding sharply over the multi-year window. Activity is moderately concentrated: Toshiba and Sumitomo Electric lead, but a broad mix of corporates, spin-outs, and universities occupies the tier immediately below, signaling an open competitive field.
Toshiba and Sumitomo Electric lead, but no single player dominates
Toshiba holds the top position among the largest filers, followed closely by Sumitomo Electric Industries, Twelve Benefit Corp, and Cabot Corp, with the University of Toronto rounding out the top five. The top five filers account for 22% of the combined total among the hundred largest filers, indicating that no single organization has established a commanding lock on the space.
The tier gap between first and fifth place is narrow — the top applicant holds 32 patent records versus 26 for the fifth-ranked entity — and the ranking includes a notable mix of Japanese industrials, North American corporates, a specialty carbon company, and a major university. This breadth suggests the competitive front is wide and entry barriers remain relatively low.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Toshiba Corporation | 32 | |
| 2 | Sumitomo Electric Industries, Ltd. | 31 | |
| 3 | Twelve Benefit Corp | 27 | |
| 4 | Cabot Corporation | 27 | |
| 5 | The Governing Council of the University of Toronto | 26 | |
| 6 | Honda Motor Co., Ltd. | 23 | |
| 7 | Regents of the University of California | 22 | |
| 8 | Johnson Matthey Hydrogen Technologies Ltd | 22 | |
| 9 | Johnson Matthey PLC | 21 | |
| 10 | Intelligent Energy Ltd | 16 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Elchem Tech | 16 | |
| 12 | Industrie De Nora S.p.A. | 16 | |
| 13 | TOSHIBA ENERGY SYST & SOLUTIONS CORP | 15 | |
| 14 | Verdagy Inc | 14 | |
| 15 | Twelve Benefit Corp (formerly Opus 12) | 14 | |
| 16 | Ohio University | 11 | |
| 17 | Spanish National Research Council (CSIC) | 11 | |
| 18 | University of Castilla-La Mancha | 11 | |
| 19 | KOREA INST OF SCI & TECH | 11 | |
| 20 | M HIKARI & ENERGY LABORATORY CO LTD | 10 |
The presence of well-funded start-ups (Twelve Benefit Corp, formerly Opus 12) and multiple universities in the top ten implies that both incremental engineering and foundational research are active simultaneously, which typically precedes a phase of accelerated commercialization and deal-making.
The most recent 18–24 months of filing data are subject to publication lag and will undercount actual activity; treat 2025–2026 figures as provisional floors rather than final counts. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filings have accelerated since 2021 and technology focus remains anchored in electrolytic compound production
The annual filing trend and the IPC technology composition together reveal a field that is both growing and technically coherent: activity has been climbing since a 2019 trough, while the dominant classification block is electrolytic production of compounds.
Annual filing trend
Annual filings were at 50 in 2017, dipped to a low of 15 in 2019, then recovered steadily through 2021 before accelerating sharply to 63 in 2022, 69 in 2023, and 104 in 2024 — the apparent peak year in the available data. The 2025 figure of 53 and the 2026 figure of 3 should be read as provisional minimums given publication lag; they do not indicate a real decline.
↗ Hover for values · click a bar to ask EurekaTechnology composition
C25B (electrolytic production of compounds) is overwhelmingly dominant in the IPC mix, reflecting the core reactor-cell engineering focus of the corpus. H01M (batteries, cells, and fuel cells) forms a substantial secondary cluster, linking reactor design to fuel-cell stack architecture. B01J (chemical and physical processes and catalysis) is a meaningful tertiary branch, indicating active work at the electrode–catalyst interface. Remaining branches each account for a small share, spanning separation processes, inorganic compounds, and coating technologies.
↗ 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.
Membrane electrode assembly for electrochemical cell
Disclosed is a membrane electrode assembly that includes a polymer electrolyte membrane, a first electrochemical reaction layer formed on one side of the polymer electrolyte membrane to allow an oxidation reaction to occur thereon, a first electron-conductive layer formed between the polymer electrolyte membrane and the first electrochemical reaction layer… (excerpt from the patent abstract)
Open this patent in Eureka →| # | Patent | Citations |
|---|---|---|
| 1 | Electrocatalyst powders, methods for producing pow… | 215 |
| 2 | Electrocatalyst powders, methods for producing pow… | 153 |
| 3 | Electrochemical fuel cell with an electrode substr… | 148 |
| 4 | Method and apparatus for electrochemical productio… | 135 |
| 5 | Electrochemical cells having current-carrying stru… | 118 |
| 6 | Method for the production of electrocatalyst powders | 116 |
| 7 | Electrocatalyst powders, methods for producing pow… | 112 |
| 8 | Rhodium electrocatalyst and method of preparation | 112 |
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.
What the patent structure means for R&D investment decisions
The combination of confirmed growth, moderate concentration, cross-sector collaboration, and US-led but globally distributed filing activity shapes where differentiated R&D positions can still be built.
Growth stage: filings accelerating, not yet plateauing
The lifecycle evidence classifies this field as Growth, with annual filings still rising and the most recent years understated by publication lag. The multi-year window shows 188% growth. Organizations entering now face rising prior art but also a window before the dominant design becomes fully locked in — making technical differentiation still meaningful.
Growth stageModerate concentration with a broad competitive tier
The top five filers collectively hold 22% of the hundred largest filers’ combined total, leaving 78% distributed across a long tail of corporates, universities, and start-ups. No single assignee appears positioned to impose a de facto standard. New entrants with focused technology theses — particularly in adjacent IPC branches — can accumulate meaningful positions without colliding directly with the leaders.
Open fieldIndustry–university partnerships are the dominant co-filing pattern
The most active co-filing pairs are Twelve Benefit Corp (Opus 12) with the University of California (15 joint records), Toshiba with Toshiba Energy Systems and Solutions (15 records), and the University of Toronto with TotalEnergies (10 records). These pairings reflect a pattern where start-ups and oil majors use university relationships to access fundamental electrochemistry research, while Toshiba’s internal co-filing indicates a structured internal IP architecture across subsidiaries.
Co-filing activeUS leads filing jurisdiction; PCT and EPO signal broad protection intent
The United States is the primary filing jurisdiction, followed by WIPO PCT and the European Patent Office. China, Japan, Canada, India, and South Korea each host meaningful activity, indicating that the leading applicants are pursuing multi-jurisdictional protection rather than concentrating in a single market. Organizations building freedom-to-operate positions should map coverage in all six of these primary offices.
Multi-jurisdictionalGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Twelve Benefit Corp (formerly Opus 12) | Regents of the University of California | 15 |
| Toshiba Corporation | Toshiba Energy Systems & Solutions Corporation | 15 |
| The Governing Council of the University of Toronto | TotalEnergies SE | 10 |
| Toshiba Corporation | The University of Tokyo | 5 |
| The Governing Council of the University of Toronto | California Institute of Technology | 4 |
| Honda Motor Co., Ltd. | Mitsui Mining & Smelting Co., Ltd. | 3 |
| Johnson Matthey PLC | Ballard Power Systems Inc | 2 |
| The Governing Council of the University of Toronto | Total Energy Ventures International SAS | 2 |
| Honda Motor Co., Ltd. | National Institute of Advanced Industrial Science and Technology (AIST) | 2 |
| Twelve Benefit Corp (formerly Opus 12) | Lawrence Berkeley National Laboratory | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Toshiba anchors cell-level electrolysis; Sumitomo Electric bridges reactor and fuel-cell stack design
The two leading filers occupy distinct but adjacent technical positions. Toshiba concentrates on core electrolytic cell and electrode engineering, while Sumitomo Electric’s portfolio bridges reactor hardware with separation and fuel-cell stack technologies.
Toshiba
Toshiba holds the top position with 32 patent records, with its technical emphasis spread across C25B 1 (electrolytic production), C25B 9 (cell design), and C25B 11 (electrode engineering). Momentum data classifies Toshiba as a new entrant in the recent filing window, suggesting a deliberate and recent build-up rather than a long-established portfolio, and its 25 recent-period records confirm sustained current activity. Co-filing with the University of Tokyo adds foundational research depth.
patent records: 32Sumitomo Electric Industries
Sumitomo Electric Industries ranks second with 31 patent records, with its technical focus spanning B01J 19 (reactor-scale chemical processes), B01D 53 (gas separation), and H01M 8 (fuel-cell stacks) — a cross-domain mix that positions it at the system-integration layer rather than pure cell engineering. This broader footprint may support licensing leverage across both hydrogen production and fuel-cell deployment applications.
patent records: 31| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Toshiba Corporation | 25 | ▲ new entrant |
| Johnson Matthey PLC | 1 | ▲ new entrant |
| The Governing Council of the University of Toronto | 5 | ▼ -74% |
| Honda Motor Co., Ltd. | 17 | ▲ new entrant |
| Regents of the University of California | 4 | ▲ new entrant |
| Johnson Matthey Hydrogen Technologies Ltd | 13 | ▲ new entrant |
Under-served branches adjacent to the core electrolysis cluster
Several IPC branches appear at low share in the corpus relative to the dominant C25B cluster. These are observations of relative sparsity; only those with plausible technical linkage and a realistic entry path are highlighted as warranting closer watch.
C01B · Non-metallic elements and inorganic compounds
With 64 patent records and a 3% share of the IPC mix, C01B — covering production of hydrogen, oxygen, ozone, and other non-metallic compounds — is notably sparse given that electrolytic hydrogen and oxygen production are core use cases for reactor design. The gap suggests that patent protection at the product-of-reaction level (as distinct from the reactor apparatus level) has not been fully developed. Organizations already active in C25B reactor engineering have a natural entry path by extending claims into C01B product and purity specifications.
Search this in Eureka →B01D · Separation processes
B01D accounts for 56 patent records and a 3% share, covering membrane separation, gas scrubbing, and filtration — all of which are integral to downstream processing in electrochemical systems producing CO2-reduction products or green hydrogen. The relative sparsity suggests that integrated reactor-plus-separation system claims are underdeveloped. Sumitomo Electric’s presence in B01D 53 shows this path is viable, but the competitive density remains low enough to allow new entrants to establish differentiated positions in membrane-integrated reactor architectures.
Search this in Eureka →How the leading filers differ by IPC technology route
Route coverage across the main technology branches in the current evidence set.
| Player | C25B 9 · Electrolytic production of compounds | C25B 11 · Electrolytic production of compounds | C25B 1 · Electrolytic production of compounds | H01M 8 · Batteries, cells & fuel cells | H01M 4 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| Toshiba Corporation | Strong · 25 | Strong · 21 | Strong · 26 | Absent | Absent |
| Johnson Matthey PLC | Strong · 13 | Strong · 19 | Absent | Strong · 17 | Strong · 19 |
| Twelve Benefit Corp (formerly Opus 12) | Strong · 33 | Moderate · 15 | Absent | Moderate · 12 | Absent |
| Industrie De Nora S.p.A. | Absent | Strong · 14 | Strong · 9 | Absent | Strong · 15 |
| Johnson Matthey Hydrogen Technologies Ltd | Absent | Strong · 10 | Absent | Strong · 13 | Strong · 14 |
| Angstrom Power Inc | Strong · 11 | Absent | Absent | Strong · 11 | Strong · 11 |
| University of Castilla-La Mancha | Strong · 10 | Strong · 11 | Strong · 10 | Absent | Absent |
Frequently asked questions
The corpus covers 448 patent families. This is the base count from which filing trends, applicant rankings, and technology composition are derived.
Toshiba holds the top position with 32 patent records, followed closely by Sumitomo Electric Industries with 31, Twelve Benefit Corp with 27, Cabot Corp with 27, and the University of Toronto with 26.
The evidence classifies the field as Growth stage. Annual filings rose from 15 in 2019 to 104 in 2024, representing 188% growth over the multi-year window. The 2025 and 2026 figures are provisional minimums due to publication lag and should not be interpreted as a reversal.
The United States leads with 230 patent records, followed by WIPO PCT with 116, Europe (EPO) with 98, China with 78, Japan with 58, Canada with 42, India with 33, and South Korea with 31. The broad multi-jurisdictional pattern among leading filers indicates that protection in all major markets is considered commercially significant.
The most active co-filing pairs are Twelve Benefit Corp with the University of California (15 joint records), Toshiba with Toshiba Energy Systems and Solutions (15 records), and the University of Toronto with TotalEnergies (10 records). These pairings reflect both internal corporate IP structuring and industry–university partnerships focused on fundamental electrochemistry.
The most notable under-served adjacent branches are C01B (non-metallic elements and inorganic compounds, including product-level hydrogen and oxygen claims) and B01D (separation processes, including membrane-integrated reactor architectures), each holding a 3% share of the IPC mix despite being technically central to the field’s applications. C01G, C07C, and B05D are additional low-density branches worth monitoring.
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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.