Graphene Supercapacitor Patents: Top Companies & Filing Trends 2026
A data-backed look at graphene supercapacitor patents: who leads filings, how concentrated the field is, which IPC branches carry the claims, and where white space remains through 2026.
Filing growth = 2021 (18 records) → 2024 (18); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 309 records in scope (CR5), not the ranked leaders only.
What the graphene supercapacitor patent record actually shows
Graphene supercapacitor patents sit at the intersection of electrode materials science and energy-storage device engineering, and the 309 records in scope reflect that split: every record carries an H01G capacitor classification, but a meaningful share also touch battery-adjacent (H01M) or inorganic-compound (C01B) classes, which is where graphene’s material claims and the device claims around it overlap. Filing activity peaked in 2018 at 46 records and has since settled into a lower, flatter pattern, with 2021 and 2024 both landing at 18 records — a plateau rather than a decline once publication lag is factored in. Ownership is concentrated: the ranked leader holds 29 records, and the top five combined account for 23.6% of all 309 records in scope.
That combination — a dominant early filer, a flat but not shrinking filing rate, and claim density spread thin outside the core capacitor class — points to a field where the foundational electrode architecture is largely staked out, but application-specific and adjacent-branch claims remain comparatively open.
Filing trends and technology composition
The dataset spans 309 published records filed or published between 2015 and the 2026 cut-off, drawn from six major receiving offices led by the United States, China and WIPO's PCT route.
A peak in 2018, then a plateau
Filings ran from 35 in 2017 to a peak of 46 in 2018, then eased down to a steady band; 2021 and 2024 both post 18 records, a 0% change across that three-year span. The most recent years understate true filing activity because publication typically lags filing by around 18 months.
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.
Capacitor claims dominate, but rarely alone
All 309 records carry an H01G capacitor classification by definition of the search scope. Beyond that, H01M batteries/cells (17.2%) and C01B inorganic compounds (15.9%) are the two largest secondary branches, followed by H02J power/grid systems (7.1%) and B82Y nanotechnology (6.1%) — smaller branches such as H01L semiconductors, C25B electrolytic production and A24F smokers' requisites each sit under 4% of records.
Shares are the percentage of the 309 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Graphene Supercapacitor Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about graphene supercapacitor patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited and most representative filings
US20240186075A1 — Graphene Supercapacitor
Provided herein is a supercapacitor containing a perovskite oxide or transition metal oxide substrate, a graphene monolayer arranged on the substrate, and at least two electrodes, wherein the graphene monolayer is arranged between the substrate and the at least two electrodes. Methods for fabricating and charging the supercapacitor are also provided.Filed by an individual inventor rather than a corporate assignee, this 2024 filing illustrates how narrowly a single-monolayer, substrate-specific architecture can still be claimed even after a decade of foundational filings.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US9437372B1 | Process for producing graphene foam supercapacitor electrode | 101 |
| 2 | US20170194105A1 | Supercapacitor having an integral 3D graphene-carbon hybrid foam-based electrode | 58 |
| 3 | US20160086740A1 | Multi-layer based new conceptual battery type supercapacitor with high power density and high energy density … | 52 |
| 4 | US20160133396A1 | Printed supercapacitors based on graphene | 51 |
| 5 | CN102543483A | 一种超级电容器的石墨烯材料的制备方法 | 48 |
| 6 | US20190206632A1 | Supercapacitor and Electrode Having Cellulose Nanofiber-Spaced Graphene Sheets and Production Process | 37 |
| 7 | US20170221643A1 | Supercapacitor electrode having highly oriented and closely packed graphene sheets and production process | 34 |
| 8 | WO2013155276A1 | Integrated 1-d and 2-d composites for asymmetric aqueous supercapacitors with high energy density | 34 |
| 9 | US20210351413A1 | Conducting composite current collector for a battery or supercapacitor and production process | 32 |
| 10 | US20180355194A1 | Flexible, biodegradable, and biocompatible supercapacitors | 32 |
Citation counts reflect influence within the searched corpus and favour older filings; a low-citation recent record is not necessarily a weak one.
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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Three patterns stand out once the ranking, the trend and the IPC composition are read together: a heavy early leader, a plateau rather than a collapse, and secondary claim branches that stay thin relative to the core.
A dominant leader, then a long tail
The ranked leader alone holds 29 records against a field of 100 ranked assignees, and the top five combined take 23.6% of all 309 records in scope. Below that the field thins quickly — tenth place holds just 7 records — which means most participants are single- or few-filing entrants rather than repeat filers.
Plateau, not decline
After peaking at 46 records in 2018, annual filings settled lower and have held flat: 2021 and 2024 both recorded 18 filings. Because publication lags filing by roughly 18 months, the 2025-2026 figures are still filling in and should not be read as a slowdown.
Device claims lean on battery-adjacent art
Beyond the H01G capacitor core, the largest secondary branch is H01M (batteries, cells and fuel cells) at 17.2% of records, followed closely by C01B inorganic compounds at 15.9%. Grid-scale power systems (H02J, 7.1%) and nanotechnology applications (B82Y, 6.1%) are present but comparatively under-claimed.
Co-filing is rare and narrow where it exists
Only 10 co-assignee pairs appear in the dataset at all, and the strongest single pairing accounts for 12 joint records — the rest are pairs of 2. Cross-assignee collaboration is the exception here, not the norm.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to graphene supercapacitor patent landscape, with the prior art for and against each one.
Where to take this analysis
The figures above show where claim density sits today; deciding whether to file, license or design around requires drilling into the specific claim language behind those numbers.
Map the white space branches
H02J and B82Y carry a fraction of the claim density of the core capacitor and battery classes. Before assuming that means opportunity, check what those thinner branches are actually claiming and why filers have avoided them.
Explore white space in EurekaStress-test a draft claim
Run a candidate claim against the highest-cited filings and the leader's portfolio to see how close it sits to existing electrode-architecture and substrate claims before committing search or filing budget.
Check claim novelty in EurekaCommon questions on graphene supercapacitor patents
One assignee leads the ranked field with 29 records, well ahead of the fifth-place holder at 9 records. The top five assignees combined account for 23.6% of all 309 records in scope, meaning ownership is concentrated at the top but not monopolised. Below the top ten, filing counts drop off quickly, with a long tail of assignees holding only a handful of records each.
The trend is best described as a plateau rather than clear growth or decline. Filings peaked in 2018 at 46 records, then settled lower; 2021 and 2024 both recorded 18 filings, a 0% change across that span. Because patent publication typically lags filing by around 18 months, the most recent one to two years in any such dataset will always look artificially low, so recent softness should not be read as a real slowdown yet.
Every record in this dataset carries an H01G capacitor classification by definition of the search, but many also carry secondary classes. The largest secondary branches are H01M (batteries, cells and fuel cells) at 17.2% of records and C01B (non-metallic elements and inorganic compounds) at 15.9%. Smaller but present branches include H02J power/grid systems, B82Y nanotechnology, H01L semiconductors, C25B electrolytic production and A24F smokers' requisites.
The United States is the largest receiving office with 116 filings, followed by China at 60 and the WIPO PCT route at 40. India (31), the European Patent Office (25) and Israel (8) round out the major offices in this dataset. This spread suggests filers are pursuing both direct national protection in the largest markets and international PCT filings to preserve options across jurisdictions.
The IPC composition points to comparatively thin claim density in grid-scale power systems (H02J, 7.1% of records) and nanotechnology-specific applications (B82Y, 6.1%), relative to the dominant capacitor and battery-adjacent branches. That does not guarantee those branches are easy to file into, but it does mean fewer prior filings to clear. A practitioner should still check the specific claim language in those branches before assuming freedom to operate.
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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.