Electrolyzer CCM Manufacturing Patents: Leaders & White Space 2026
- Filing peaked in 2022 at 54 records and has since declined to 7 by 2026 (partial year), suggesting the field is consolidating around known approaches rather than still expanding.
- 67.3% of the 547 records sit in H01M the battery and fuel-cell class, with electrolytic production (C25B, 10.1%) and coating apparatus (B05C, 8.2%) as the clearest adjacent claim territory.
- The top 5 assignees hold 32.5% of all records and the top 10 hold 43.7% — concentrated enough to matter, but with more than half the field held by a long tail of single- and few-filing entrants.
What this landscape covers
Catalyst coated membrane manufacturing sits at the intersection of electrode coating chemistry and electrolyzer or fuel-cell system design. This landscape covers 547 published records filed between 2015 and mid-2026 that describe catalyst ink formulation, dispersion control, coating uniformity, loading, membrane swelling, roll-to-roll throughput or quality inspection in the context of catalyst coated membranes or electrode coating more broadly. Because the search string spans both electrolyzer-specific and general electrode-coating language, the corpus pulls in adjacent battery, capacitor and display-coating filings alongside electrolyzer-specific ones — a reflection of how much CCM manufacturing IP is filed as general coating or dispersion art rather than as electrolyzer-specific claims.
Publication lags filing by roughly 18 months, so the 2026 filing count is understated and should not be read as a real drop-off yet. The patterns below use patent families and record-level IPC classes rather than raw document counts, since families neutralise multi-jurisdiction and continuation filing that would otherwise inflate any single assignee's apparent share.
Filing trend and technology composition
Two views of the same 547 records: how filing activity has moved year over year, and how those records distribute across IPC subclasses. Because a single record can carry several classes, the class shares add up to more than 100% of the record total.
Filing trend, 2017-2026
Annual filings rose from 21 in 2017 to a peak of 54 in 2022, then declined toward 7 by 2026 — a partial year understated by publication lag. Read the 2022 midpoint as the field's high-water mark rather than as evidence of continued growth.
IPC subclass composition
H01M (batteries, cells & fuel cells) accounts for 67.3% of the 547 records, far ahead of H01G capacitors (11.7%) and C25B electrolytic production of compounds (10.1%). Coating apparatus (B05C, 8.2%) and coatings/inks (C09D, 3.7%) mark the process-equipment side of the same filings.
Shares are the percentage of the 547 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Electrolyzer Catalyst Coated Membrane Manufacturing with Eureka
This page is one run against one query. Ask Eureka your own question about electrolyzer catalyst coated membrane manufacturing and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative filing
Dispersant for electrode coating liquid, and electrode coating liquid composition
A composition that includes a dispersion stabilizer for an electrode coating liquid for a power storage device is provided. The composition has superior ability to stably disperse an electrode active material and a conductive material, and makes it possible to manufacture a uniform electrode, even when a dispersion device that has weak shear force is used. A dispersant for an electrode coating liquid for a power storage device, the dispersant being characterized by containing cellulose fibers that satisfy (a)-(c). (a) The number average width of the short widths is 2-200 nm. (b) The aspect ratio is 7.5-250. (c) Cellulose I crystals are included and the crystallinity thereof is 70%-95%.Filed 2021-07-08. Claims a cellulose-fiber dispersant defined by width, aspect ratio and crystallinity rather than by a specific electrode chemistry, which is what makes it read broadly across coating liquid formulations.
View full record| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US8264761B2 | Vehicle rearview mirror with spotter mirror | 119 |
| 2 | US6423105B1 | Process for producing an electrode for a battery | 88 |
| 3 | US20100321757A1 | Vehicle rearview mirror with spotter mirror | 73 |
| 4 | JP2006107896A | Manufacturing method of electrode plate for negative electrode of nonaqueous secondary battery | 65 |
| 5 | US20190123339A1 | Anode electrode composition of li-ion battery cell | 52 |
| 6 | US5269175A | Sensor for investigating liquids | 50 |
| 7 | JP1999003709A | Manufacture of lithium secondary battery | 47 |
| 8 | US20050208207A1 | Method of producing electrode for capacitor | 44 |
| 9 | WO2009083693A2 | Substrate for an organic light-emitting device, and organic light-emitting device incorporating it | 43 |
| 10 | WO2008029060A2 | Substrate for an organic light-emitting device, use and process for manufacturing this substrate, and organic… | 43 |
Citation counts favour older filings simply because they have had more time to be cited within this searched corpus — treat them as a signal of influence, not of present-day importance.
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 filing strategy
Three read-throughs from the concentration, class and geography data — useful for deciding where a new filing has room and where it will land on top of existing claims.
Leadership is real but not locked in
The top 5 assignees hold 32.5% of all 547 records and the top 10 hold 43.7% — enough concentration to warrant a freedom-to-operate check against the leaders, but with the majority of records held by a long tail of smaller and single-filing entrants.
Most claim activity sits in battery-class art, not electrolyzer-specific classes
Two-thirds of records classify under H01M, while C25B — the class specific to electrolytic production of compounds — covers only 10.1%. Much of what would function as CCM manufacturing IP is filed and classified as general battery-electrode coating rather than as electrolyzer-specific claims.
US filing leads, but Europe and China are close behind
The United States receives the largest share of filings at 176, with Europe (EPO, 103) and China (87) both substantial. WIPO PCT filings (58) point to a meaningful share of applicants pursuing multi-jurisdiction protection rather than filing nationally first.
Filing has cooled since its 2022 peak
Annual filings dropped from a peak of 54 in 2022 toward 7 in the most recent, partial year. Several previously active assignees show zero filings in the latest year, though the 2026 figure understates true activity because of publication lag.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to electrolyzer catalyst coated membrane manufacturing, with the prior art for and against each one.
Players and where activity is moving
The ranked field covers 100 companies counted by records. Activity is concentrated enough at the top to matter, but momentum has cooled across most named leaders in the latest year.
A single leader well ahead of fifth place
The top-ranked assignee holds 68 records versus 25 at fifth place and 10 at tenth — a steep drop-off that marks a genuine leader rather than a tightly bunched top group.
Several named leaders show no filings in the most recent year
More than one top-ranked assignee recorded zero filings in the latest year, some down -100% year over year from prior activity. This tracks the broader post-2022 decline rather than signalling exit from the field outright, given publication lag.
Co-filing is limited but concentrated where it happens
Only 10 co-assignee pairs appear across the corpus, with the strongest pairing co-filing 7 records together. This points to mostly independent filing strategies, with a handful of tight bilateral development relationships rather than a broad collaborative network.
| Assignee | Recent year | YoY |
|---|---|---|
| Northvolt AB | 2 | — |
| LG Energy Solution Ltd. | 0 | -100% |
| Dai-ichi Kogyo Seiyaku Co., Ltd. | 0 | — |
| Samsung SDI Co., Ltd. | 0 | -100% |
| Enevate Corp | 0 | -100% |
| PPG Industries Ohio, Inc. | 0 | — |
| Saint-Gobain Vitrage SA | 0 | — |
| Wacker Chemie AG | 0 | — |
Where to take this next
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, white-space filing, or tracking a named competitor.
Check claim overlap before filing in H01M-adjacent coating processes
With 67.3% of records in H01M, a new coating-uniformity or dispersion claim is likely to sit near existing battery-electrode art even if the intended use is electrolyzer-specific. A class-level prior art check against both H01M and C25B is worth doing before drafting.
Explore the IPC breakdown in Eureka →Track leaders whose filing has gone quiet
Several top assignees show zero filings in the latest year. Whether that is a pause, a shift to trade secret protection, or genuine exit matters for competitive planning and is worth monitoring rather than assuming.
Set up assignee monitoring in Eureka →Test claim language in the under-claimed branches
Roll-to-roll throughput control and membrane swelling compensation show lighter density than the core coating-liquid art. A first claim anchored to a specific process parameter in these branches has more room than one filed against dispersion chemistry directly.
Draft and stress-test claims in Eureka →Common questions on this landscape
In this dataset of 547 records, one assignee leads with 68 records, well ahead of the fifth-ranked assignee at 25 and the tenth at 10. The top 5 assignees together hold 32.5% of all 547 records and the top 10 hold 43.7%, which means over half the field is held by a long tail of smaller filers. Anyone doing freedom-to-operate work should check the leader's claims first, but should not assume the field is a closed oligopoly given how much of it sits outside the top 10.
Filing activity peaked in 2022 at 54 records and has declined since, down to 7 by 2026, though that final year is a partial figure understated by an approximately 18-month publication lag. The honest read is that filing has cooled from its 2022 high rather than that the technology has stopped developing — some of the apparent 2025-2026 drop will fill in as later publications catch up. Treat the last one to two years of any trend chart in this space with that caveat.
The dominant class is H01M (batteries, cells and fuel cells), covering 67.3% of the 547 records, followed by H01G capacitors at 11.7% and C25B electrolytic production of compounds at 10.1%. Coating apparatus (B05C) and coatings, paints and inks (C09D) appear at 8.2% and 3.7% respectively, marking the equipment and formulation sides of the same filings. Because records can carry multiple IPC classes, these shares add up to more than 100% of the record total and should not be treated as mutually exclusive buckets.
Relative to the dense core of battery-electrode coating-liquid art, branches like roll-to-roll throughput control, in-line coating uniformity inspection, and membrane swelling compensation during coating carry lighter claim density in this corpus. C25B, the class specific to electrolytic production of compounds, covers only 10.1% of records versus 67.3% for the general H01M battery class, suggesting electrolyzer-specific process claims are less crowded than general electrode-coating claims. A first claim tied to a specific measurable process parameter in one of these branches has more room to stand than a broad dispersion-chemistry claim.
The filing claims a cellulose-fiber dispersant for electrode coating liquids, defined by fiber width (2-200 nm), aspect ratio (7.5-250) and Cellulose I crystallinity (70%-95%), rather than by a specific electrode chemistry or end device. That composition-level framing is what gives it reach across coating-liquid formulations generally, including outside its filed battery context. It does not block electrode coating work outright, but any dispersant using cellulose fibers in that width and crystallinity range should be checked against it specifically.
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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.