Asymmetric Supercapacitor Durability Patents: Who Leads 2026
- Still a small, accelerating field. 13 published families total, but filings climbed from zero in 2017 to a peak of 5 in 2025 — growth is recent, not historic.
- No single assignee dominates. Recent-year momentum is split six ways at two filings each, with academic co-filing pairs doing most of the work rather than one corporate leader.
- Filed for India and the US first. India (7) and the United States (6) are the leading receiving offices — this is not yet a broadly globalised filing strategy.
A narrow, fast-emerging niche inside supercapacitor IP
Asymmetric and hybrid supercapacitor designs that specifically claim wide-temperature operation, cycling durability or self-discharge stability form a small but tightening corner of the broader capacitor patent space. The dataset holds only 13 published families across the full 2015-2026 window, concentrated almost entirely under H01G (capacitors), with secondary claim activity in polymer chemistry (C08G, C08K) and nanomaterials (B82Y). Filing did not begin in earnest until the back half of the window and is still climbing as of the most recent full year.
Because publication typically lags filing by around 18 months, the 2025 and 2026 counts are undercounts of actual filing activity — the true recent trend is likely stronger than the raw numbers show. Treat the current picture as an early snapshot of a field that is still forming its claim structure rather than a mature, settled one.
Where the filings sit, and how fast they are growing
The trend and classification data below are drawn directly from the 13 published families in this search; use them to gauge how occupied each claim area is before drafting.
Filing trend: still accelerating
From zero filings in 2017 to 2 at the 2022 midpoint to a peak of 5 in 2025, the growth curve has not flattened. A partial 2026 (4 so far) suggests the peak year has not yet been reached once late filings are counted.
IPC composition: capacitor claims dominate, chemistry claims support them
H01G (capacitors) covers 12 of 13 records, essentially the entire dataset, while C08G and C08K polymer subclasses (4 each) and B82Y nanotechnology (3) show up as supporting material claims rather than standalone filing clusters. B21C (metal extrusion) appears only once, marking it as a fringe rather than core activity.
Shares are the percentage of the 13 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Asymmetric Supercapacitor Environmental Durability with Eureka
This page is one run against one query. Ask Eureka your own question about asymmetric supercapacitor environmental durability and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records in this corpus
One-step synthesis of barium oxide-cerium oxide thin film electrodes for high-performance asymmetric supercapacitors
The filing describes fabricating an asymmetric supercapacitor by depositing a BaO/CeO2 thin film as one electrode via a one-step SILAR process, pairing it with an activated carbon counter-electrode, and joining both through a PVA-KOH solid-state gel electrolyte layered into a stacked device.Filed by Princess Nourah Bint Abdulrahman University, published 2025-07-24.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20230087931A1 | Ultrafast, high-energy supercapacitors with open-shell polymer-carbon-based compound composites | 2 |
| 2 | US20250239419A1 | One-step synthesis of barium oxide-cerium oxide thin film electrodes for high-performance asymmetric supercap… | 1 |
Citation counts are low across the board (top record cited twice), which is expected in a small, recently-formed corpus — treat these as early signals of influence, not settled importance.
Publication numbers are shown where the record carries one (2 of 2 rows); clicking a row searches Eureka by that number.
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Three patterns stand out once the trend, classification and citation data are read together.
Growth is recent and still rising
The field went from no filings in 2017 to a peak of 5 in 2025, with the 2022 midpoint at just 2. That trajectory, combined with a partial 2026 already at 4, points to a claim space that is being staked out now rather than one with an established prior-art floor.
Capacitor claims crowd one subclass
Nearly every record sits under H01G, meaning device-level capacitor claims are where the density is. The supporting polymer (C08G, C08K) and nanomaterial (B82Y) subclasses are thinner, suggesting material-level claims still have more room.
No single leader has emerged yet
Recent-year momentum is split evenly among six assignees at two filings each, several of them individual academic inventors rather than corporations. That flat distribution is unusual for a growing field and suggests the leadership question is still open.
A two-office field, not yet global
India and the United States account for the entire visible receiving-office activity in this dataset. Filers have not yet broadened into other major jurisdictions, which leaves freedom-to-operate questions largely open outside these two offices.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to asymmetric supercapacitor environmental durability, with the prior art for and against each one.
Who is filing, and how they are working together
With only 13 families in the dataset, the assignee picture is fragmented and academic-heavy, and collaboration pairs matter as much as any single filer.
Six-way tie at the top
S P Nehra, Registrar Cent Univ of Haryana, Manisha, M T Qaeemy, Kamal Kishore and Anshu Sharma each show two filings in the latest year — a flat leaderboard rather than one dominant filer.
Cross-institution academic pairing leads co-filing
The University of Southern Mississippi and the Regents of the University of California co-file more than any other pair in this dataset, pointing to a cross-institution research programme rather than a single-lab effort.
Indian university filings cluster around shared inventors
S P Nehra pairs separately with both Registrar Cent Univ of Haryana and Manisha at two co-filings each, indicating an Indian academic cluster filing repeatedly around the same inventor group.
| Assignee | Recent year | YoY |
|---|---|---|
| S P NEHRA | 2 | — |
| REGISTRAR CENT UNIV OF HARYANA | 2 | — |
| MANISHA | 2 | — |
| M T QAEEMY | 2 | — |
| KAMAL KISHORE | 2 | — |
| ANSHU SHARMA | 2 | — |
| University of Southern Mississippi | 0 | — |
| The Regents of the University of California | 0 | — |
Where to take this analysis
This landscape is a starting point for narrower diligence, not a substitute for it.
Check freedom-to-operate against the H01G cluster
With 12 of 13 records under H01G, any new device-level claim should be checked against this cluster specifically before drafting broader capacitor claims.
Explore in EurekaTrack the six-way assignee tie forward
No filer has separated from the pack yet at two filings each in the latest year. Watching the next filing cycle will show who breaks out first.
Explore in EurekaWatch India and US filings for expansion signals
Filing activity has not yet spread beyond these two receiving offices. New filings in other jurisdictions would signal a shift toward global strategy.
Explore in EurekaCommon questions on this landscape
This search identifies 13 published patent families covering wide-temperature operation, cycling durability and self-discharge stability claims in asymmetric or hybrid supercapacitors, spanning 2015 through mid-2026. That is a small corpus compared with broader supercapacitor patent searches, reflecting how specific the environmental-durability angle is. Because publication lags filing by roughly 18 months, the true count of filed-but-unpublished applications for 2025-2026 is almost certainly higher than what is currently visible.
No single corporate assignee dominates this dataset; the leaderboard in the most recent year is a six-way tie at two filings each, split between individual academic inventors and university bodies such as the Registrar of the Central University of Haryana. This is a fragmented, early-stage field rather than one with an established incumbent. Readers should watch the next one to two filing cycles to see whether any of these tied filers pull ahead.
The overwhelming majority of records, 12 of 13, sit under H01G, the capacitor devices subclass, confirming this is fundamentally device-level IP. Supporting claims appear in polymer chemistry subclasses C08G and C08K (4 records each, likely covering solid-state gel electrolytes) and in B82Y nanotechnology (3 records). Chemical process and rare-earth compound subclasses B01J and C01F each appear only twice, and metal-extrusion subclass B21C appears just once, marking those as fringe rather than core activity.
It is growing, and growth is recent rather than historic. Filings rose from zero in 2017 to just 2 at the 2022 midpoint, then to a peak of 5 in 2025, with a partial 2026 already showing 4 filings. Because recent years are always understated due to publication lag, the actual growth rate is likely steeper than these raw figures suggest.
The H01G capacitor-device claim space is the most occupied, with 12 of 13 records tagged there, so broad device-level claims will face the most prior art. Under-claimed branches include specific material combinations such as BaO-CeO2 thin-film electrode pairs, PVA-KOH solid-state gel electrolyte formulations, and SILAR one-step deposition methods, all of which show thinner filing density than the core capacitor-device claims. Geographically, filings are concentrated almost entirely in India and the United States, leaving other major jurisdictions comparatively open for freedom-to-operate purposes.
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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.