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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/chemical-and-gas-sensors-metal-oxide-sensor-patent-landscape-patent-landscape/ · Patsnap · data cut-off 2026-08-31 · downloaded from the live page
Patent Landscape · Chemical & Gas SensorsMetal Oxide Sensor Patents: Filing Leaders, Technology Mix and White Space
A data-backed look at metal oxide gas and chemical sensor patents: who leads filings, how the technology composition breaks down across IPC classes, where filing concentration sits, and where white space remains for new
3,102
Published Records
13%
Top-5 Share of All Records
-13%
Filing Growth 2021→2024
US
Leading Jurisdiction
Filing growth = 2021 (94 records) → 2024 (82); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 3,102 records in scope (CR5), not the ranked leaders only.
Published byPatsnap Research··6 min readSourced from Patsnap Eureka
Field Overview
What the metal oxide sensor patent record shows
Metal oxide gas and chemical sensors sit at the intersection of materials science and signal processing: a semiconducting oxide film changes conductivity on exposure to a target gas, and the patent claims that matter most describe how that change is made selective, stable and readable. Across 3,102 records in scope from 2015 through the current filing year, the claim language clusters heavily around material analysis and testing (G01N), with much smaller but persistent activity in diagnosis, semiconductor integration, coating chemistry and alarm systems. That distribution tells a filer where the crowded ground is before they draft a single claim.
The assignee ranking spans corporate sensor specialists, automotive and industrial conglomerates, and university research foundations, with the leader at 135 records and the fifth-placed filer at 51. No single entity controls the field outright: the top 10 combined reach 20.0% of all records in scope, which means four out of five records in this dataset belong to filers outside that group.
Filing activity by year, 2017-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Chemical & Gas Sensors: Metal Oxide Sensor Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
The Data
Filing trend and technology composition
Two views of the same 3,102-record dataset: how filing volume has moved year over year, and how the claim language distributes across IPC subclasses.
Filing rose to a 2019 peak, then eased
Annual filings climbed from 126 in 2017 to a peak of 130 in 2019. Using only the years that are complete enough to compare, 2021's 94 filings dropped to 82 by 2024 — a 13% decline over that three-year span. Because publication typically lags filing by around 18 months, the 2025 and 2026 figures shown are still filling in and should not be read as a continuation of that decline.
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.
G01N dominates; adjacent classes are thin
Material analysis and testing (G01N) appears on 78.8% of the 3,102 records in scope, far ahead of diagnosis & surgery (7.7%), semiconductor devices (5.1%) and signalling & alarm systems (4.4%). Coating & surface deposition, batteries & fuel cells, nanotechnology applications and digital data processing each sit at 2.0-2.1%, meaning most records make a sensing claim without also claiming the surrounding system integration.
Shares are the percentage of the 3,102 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Chemical & Gas Sensors: Metal Oxide Sensor Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Chemical & Gas Sensors: Metal Oxide Sensor Patent Landscape with Eureka
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A representative claim and the most-cited prior art
Representative Record
Method to manipulate selectivity of a metal oxide sensor
SHARP KABUSHIKI KAISHA
A method of selectively enhancing the sensitivity of a metal oxide sensor includes fabricating a ZnO sensor having a ZnO sensor element therein, and exposing the ZnO sensor element to a plasma stream.Filed by Sharp; illustrates a narrow, process-based approach to tuning sensor selectivity through post-fabrication surface treatment rather than material substitution.
Most-cited records in this dataset
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6085576A | Handheld sensing apparatus | 586 |
| 2 | US3719564A | Method of determining a reducible gas concentration and sensor therefor | 527 |
| 3 | US6853920B2 | Control for an industrial process using one or more multidimensional variables | 406 |
| 4 | US20180011052A1 | Silicon carbide based field effect gas sensor for high temperature applications | 391 |
| 5 | US6356205B1 | Monitoring, diagnostic, and reporting system and process | 340 |
| 6 | US6773565B2 | NOx sensor | 308 |
| 7 | US6865509B1 | System for providing control to an industrial process using one or more multidimensional variables | 308 |
| 8 | US20020026937A1 | Respiratory gas sensors in folw path | 279 |
| 9 | US6234006B1 | Handheld sensing apparatus | 227 |
| 10 | US6469303B1 | Non-dispersive infrared gas sensor | 226 |
Citation counts reflect influence inside this searched corpus and favour older filings; treat them as a signal of what later filers built on, not of what is currently most valuable to file around.
Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Chemical & Gas Sensors: Metal Oxide Sensor Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the numbers mean for a filing decision
Four read-outs from the dataset that matter more for strategy than the raw counts alone.
Concentration
13.3%
of 3,102 records held by the top 5
Leadership is real but not exclusive
The leading filer holds 135 records and the top five combined reach 13.3% of all records in scope. That leaves the large majority of filings spread across a long tail of corporate, academic and single-filing entrants — a field still open to new claims rather than one locked up by a handful of blocking portfolios.
Based on the 100-company ranked list
Technology mix
78.8%
of records carry a G01N class
The core sensing claim is crowded; the integration layer is not
Material analysis and testing (G01N) covers the large majority of records, while classes tied to system integration — nanotechnology applications, digital data processing, batteries and coatings — each sit at only 2.0-2.1%. Claims that combine the sensing element with a specific downstream application face less prior art density than claims on the sensing mechanism alone.
IPC subclass shares, out of 3,102 records
Filing trend
-13%
2021 to 2024 filing change
Volume has eased from its 2019 peak, not collapsed
Filings peaked at 130 in 2019 and, comparing complete years only, fell 13% from 94 in 2021 to 82 in 2024. That is a measured pullback, not a signal that the technology is exhausted — recent years are still under-counted because publication lags filing by roughly 18 months.
Complete-year comparison, 2021 vs 2024
Filing geography
967
US-directed records, the largest single office
The US and Europe anchor filing strategy; Korea and India are secondary but active
The United States leads receiving offices with 967 records, ahead of the EPO at 493 and Japan at 326. WIPO PCT filings (270) sit above South Korea (219) and India (168), suggesting most filers still route through a national-first strategy before deciding on broader PCT coverage.
Receiving office counts, all records in scope
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to chemical & gas sensors: metal oxide sensor patent landscape, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Chemical & Gas Sensors: Metal Oxide Sensor Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this analysis
The dataset points to specific next questions for an IP or R&D team working in this space.
Map the white space around system integration claims
With nanotechnology, digital processing, coatings and battery-adjacent classes all sitting near 2% of records, there is room to claim a metal oxide sensing element combined with a specific downstream application rather than the sensing mechanism alone.
Explore white space in EurekaWatch the long tail, not just the leader
With the top 10 filers holding only 20.0% of all records, competitive monitoring needs to extend well past the largest assignees to catch emerging entrants before they build a defensible position.
Track new entrants in EurekaRead the 2025-2026 dip with caution
Because publication lags filing by around 18 months, the most recent two years in this dataset will keep filling in. Re-check the trend against a later data pull before drawing conclusions about slowing innovation.
Set up a filing alert in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Chemical & Gas Sensors: Metal Oxide Sensor Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions on metal oxide sensor patents
The ranked leader in this dataset holds 135 records, with the fifth-placed filer at 51 and the tenth at 36. The top five combined account for 13.3% of all 3,102 records in scope, and the top ten reach 20.0%, which means leadership is meaningful but not exclusive. The remaining roughly 80% of filings are spread across a long tail of corporate, academic and smaller filers, so competitive monitoring should not stop at the largest names.
The overwhelming majority, 78.8% of the 3,102 records in scope, carry a G01N classification for material analysis and testing, which covers the core sensing mechanism. Smaller but consistent activity appears in diagnosis and surgery (7.7%), semiconductor device integration (5.1%), and alarm and signalling systems (4.4%). Because a single record can carry multiple classes, these figures do not sum to 100% and should be read as independent shares of the same record total.
Filings peaked at 130 in 2019 after climbing from 126 in 2017. Comparing the most recent complete years, filings fell from 94 in 2021 to 82 in 2024, a 13% decline over that span. Figures for 2025 and 2026 are still incomplete because publication typically lags actual filing by around 18 months, so it is too early to call this a sustained downward trend rather than a normal fluctuation.
The United States receives the most filings in this dataset at 967 records, followed by the European Patent Office at 493 and Japan at 326. WIPO's PCT route accounts for 270 records, with South Korea at 219 and India at 168. The spread suggests most applicants pursue national protection in their home or primary commercial market before deciding whether to extend coverage through PCT.
The core sensing mechanism, classified under G01N, is claimed heavily across 78.8% of records, making that ground crowded. Classes tied to system-level integration — nanotechnology applications, digital data processing, coating and surface deposition, and battery or fuel cell integration — each sit at only 2.0-2.1% of records, which is comparatively open. A first claim combining a metal oxide sensing element with a specific downstream application in one of those adjacent branches faces less prior art density than a claim on sensing chemistry alone.
Answers are grounded in the same dataset. Derived from a Patsnap search on Chemical & Gas Sensors: Metal Oxide Sensor Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.