Pseudocapacitor Current Collector Patent Snapshot
The pseudocapacitor current collector patent space is extremely narrow, with only 3 patent families in scope and ADA Technologies Inc holding the dominant position. Filing activity peaked in 2017–2019 and has since gone quiet, signaling a field that has moved past its initial IP formation phase.
ADA Technologies Inc leads a highly concentrated, low-volume niche
ADA Technologies Inc ranks first with 3 patent records, accounting for the entirety of the top applicant position in this topic. The remaining ranked applicants — Shenzhen Institute of Advanced Technology (Chinese Academy of Sciences), Nanotech Energy Inc, the Regents of the University of California, and NessCap Co. Ltd — each hold 1 patent record.
The top five filers together represent 100% of the ranked applicants visible in this query’ combined total, reflecting extreme concentration in a field with very limited overall IP volume. There is no meaningful second tier: all participants are at minimum filing levels.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | ADA Technologies Inc | 3 | |
| 2 | Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences | 1 | |
| 3 | Nanotech Energy Inc | 1 | |
| 4 | Regents of the University of California | 1 | |
| 5 | NessCap Co. Ltd | 1 |
ADA Technologies Inc’s multi-patent position, focused squarely on capacitor-class IP (H01G), gives it a structural advantage for any licensing or freedom-to-operate argument in this sub-field. Academic and startup entrants have not yet established comparable depth.
Filing data for the most recent 18–24 months is subject to publication lag and may under-represent recent activity; the absence of records after 2019 should be interpreted cautiously. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A brief 2017–2019 filing window followed by sustained inactivity
Annual filing activity and the IPC technology mix together paint a picture of a niche that had a short but defined formation period and has not attracted sustained investment since.
Annual filing trend
One filing per year was recorded in 2017, 2018, and 2019; no filings appear from 2020 onward. Even accounting for publication lag in the most recent periods, the gap since 2019 is too long to attribute to lag alone, indicating genuine inactivity rather than an artifact of reporting.
↗ Hover for values · click a bar to ask EurekaTechnology composition
The IPC mix is dominated by H01G (Capacitors) with 7 records, with a small secondary cluster in H01M (Batteries, cells & fuel cells) at 2 records. This distribution confirms the topic sits primarily in the electrochemical capacitor branch, with minor overlap into hybrid energy storage device classifications.
↗ 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.
High energy density hybrid pseudocapacitors and me…
A hybrid electrochemical energy storage device having the attributes of a high power supercapacitor and a lithium ion battery are described. The hybrid electrochemical energy storage device can be a pseudocapacitor with a cathode having a coated activated carbon powder having a coated activated carbon cathode. The coated activated carbon can provide for… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | High energy density hybrid pseudocapacitors and me… | 23 |
| 2 | 一种三维高导热导电复合材料、其制备方法与应用 | 10 |
| 3 | High energy density hybrid pseudocapacitors and me… | 3 |
| 4 | Metal Oxide Electrochemical Psedocapacitor Employi… | 2 |
| 5 | 用于高温应用的能量存储设备 | 1 |
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.
ADA Technologies Inc
ADA Technologies Inc holds 3 patent records, all concentrated in H01G (Capacitors) with additional coverage extending into H01M (Batteries, cells & fuel cells), reflecting a hybrid energy storage approach to current collector design. No applicant momentum data is available for recent periods, consistent with the field’s post-2019 inactivity.
families: 3NessCap Co. Ltd
NessCap Co. Ltd holds 1 patent record with technology focus spanning both H01G 11 (electrochemical double-layer capacitors) and H01G 9 (electrolytic capacitors), suggesting a broader capacitor platform perspective than most other entrants. As a specialist capacitor manufacturer, NessCap’s single filing represents a narrow but technically relevant stake in the space.
families: 1Frequently asked questions
The corpus in scope contains 3 patent families. This is an extremely narrow dataset, reflecting the specificity of the pseudocapacitor current collector sub-topic rather than the broader pseudocapacitor or supercapacitor fields.
ADA Technologies Inc is the leading filer with 3 patent records, giving it the largest position of any single entity in this niche. All other ranked applicants hold 1 patent record each.
Filing activity peaked across 2017, 2018, and 2019, with one filing recorded in each of those years. No filings appear from 2020 onward in the dataset, and the lifecycle stage is classified as Decline, with annual volume having eased back from that peak.
The United States leads with 3 patent records, followed by China with 2, and India and South Korea each with 1. The US-centric profile is consistent with ADA Technologies Inc’s position as a US-based entity.
H01G (Capacitors) is the primary class with 7 records, encompassing electrochemical double-layer and electrolytic capacitor subclasses. H01M (Batteries, cells & fuel cells) appears with 2 records, reflecting the overlap between pseudocapacitive and hybrid battery-capacitor device architectures.
No co-applicant filings have been recorded in this dataset. Academic institutions and commercial entities have each filed independently, with no evidence of joint R&D agreements or technology transfer arrangements reflected in the patent record.
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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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