Electrochemical Ammonia Sensor Patents: Leaders & White Space 2026
A data-backed look at electrochemical ammonia sensor patents: who leads filings, how the technology mix breaks down across IPC classes, and where claim space is still open.
Filing growth = 2021 (13 records) → 2024 (11); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 286 records in scope (CR5), not the ranked leaders only.
What the electrochemical ammonia sensor patent record shows
Electrochemical ammonia sensing sits at the intersection of industrial safety, environmental monitoring and, increasingly, clinical diagnostics. The 286 records in scope span 2015 to 2026 and cluster heavily around material analysis and testing methods, with a smaller but distinct presence in medical diagnosis, water treatment and battery-adjacent chemistry. No single assignee dominates the field outright: the leader holds 14 records against a field where the fifth-ranked company already sits at 12 and the tenth at 7, a shape that points to a technology still being contested rather than one already settled by a dominant patent holder.
Publication typically lags filing by around 18 months, so the most recent year in the trend below reads lower than it will eventually settle once pending applications publish.
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Filing trend and technology composition
Two views of the same 286-record dataset: how filing volume has moved year over year, and how the underlying technology is classified across IPC subclasses.
Filing trend, 2017-2026
Annual filings rose from 9 in 2017 to a peak of 25 in 2018, before settling into a lower, more variable range. The 2021-to-2024 window shows an 15% decline (13 to 11), and 2025-2026 figures remain provisional pending later publications catching up.
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.
IPC subclass composition
G01N (material analysis and testing) covers 70.6% of the 286 records, confirming that most patent activity treats ammonia sensing as a measurement problem first. A61B (10.1%) and G16H (2.8%) mark the clinical and health-informatics edge of the field; C02F (6.6%) and H01M (3.5%) show environmental and battery-adjacent overlap. Because records can carry multiple classes, these shares sum to more than the record total.
Shares are the percentage of the 286 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
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Try EurekaMost-cited records and a representative filing
US10900129B2 — Electrochemical gas generator for ammonia with the use of ionic liquids
An electrochemical gas generator for ammonia with the use of ionic liquids containing nitrate ions as the electrolyte, and to the use of the gas generator for generating gaseous ammonia, especially for testing the function of and/or calibrating gas sensors.Filed by Dräger Safety AG & Co. KGaA, granted 2021-01-26. This filing covers calibration-side equipment rather than the sensor itself, a separate but adjacent claim area to watch.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5527446A | Gas sensor | 145 |
| 2 | US20070299385A1 | Device for the controlled exposure of reservoir-based sensors | 129 |
| 3 | US20160052131A1 | Flexible and Stretchable Electronic Strain-limited Layer for Soft Actuators | 89 |
| 4 | US6248224B1 | Toxic sensor and method of manufacture | 60 |
| 5 | US20050211949A1 | Detectable refrigerant compositions and uses thereof | 53 |
| 6 | US7410616B2 | Device for the controlled exposure of reservoir-based sensors | 51 |
| 7 | WO2011104567A1 | Apparatus and method for detection of ammonia in exhaled air | 50 |
| 8 | US5234567A | Gas sensor | 40 |
| 9 | US20080318097A1 | Electrochemical cell for oxidation of ammonia and ethanol | 33 |
| 10 | US20050034985A1 | Atmospheric corrosion sensor | 33 |
Citation counts favour older filings that have had more time to accumulate references; treat this as a signal of influence within the searched corpus, not of current commercial weight.
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Three figures from the dataset carry direct implications for anyone deciding where to file or which claims to design around.
No single owner controls the field
The leader holds 14 records against a fifth-place figure of 12 and a tenth-place figure of 7 — a gradual taper, not a cliff. That shape means freedom-to-operate analysis has to look past the leader to a genuinely competitive set of mid-tier holders rather than a single blocking party.
Measurement-method claims dominate
Material analysis and testing (G01N) is the dominant classification by a wide margin over any other subclass, meaning most claim space is occupied by sensing and measurement mechanics rather than by end-use application. Branches like G16H healthcare informatics at 2.8% remain comparatively thin.
Volume has cooled from its 2018 peak
After peaking at 25 filings in 2018, annual volume has settled lower, with the last fully-countable three-year window (2021-2024) down 15%. Because publication lags filing by roughly eighteen months, 2025 and 2026 counts will keep rising as more records surface — the near-term trend line is not yet readable.
US and EPO dominate the receiving-office split
The United States (83) and the EPO (53) lead filing destinations, with WIPO/PCT (28), India (27), the UK (18) and Germany (14) forming the next tier. Anyone assessing enforcement risk or freedom-to-operate should weight US and European prosecution first.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to chemical & gas sensors: electrochemical ammonia sensor patent landscape, with the prior art for and against each one.
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Open Eureka →Common questions about electrochemical ammonia sensor patents
Across the 286 records in scope, the leading assignee holds 14 records, with the field tapering gradually rather than dropping off a cliff — fifth place sits at 12 and tenth place at 7. This means no single company controls the technology outright; the top five together account for only 23.4% of all 286 records. A freedom-to-operate review needs to look across a genuinely competitive set of mid-tier holders, not just the nominal leader.
Filing volume peaked in 2018 at 25 records in a single year and has not returned to that level since. The most recent fully-countable three-year span, 2021 to 2024, shows an 15% decline (13 down to 11). However, publication typically lags actual filing by roughly eighteen months, so the 2025 and 2026 figures in any dataset pulled today are understated and should not be read as evidence the field is currently slowing.
The overwhelming majority, 70.6% of the 286 records, classify under G01N (material analysis and testing), confirming that most patent activity treats ammonia sensing as a core measurement problem. Smaller but distinct clusters sit in A61B diagnosis and surgery (10.1%), C02F water and wastewater treatment (6.6%), and H01M batteries and fuel cells (3.5%), showing the technology reaching into clinical, environmental and energy-storage adjacent applications. Since a single record can carry multiple IPC classes, these percentages do not sum to 100%.
US10900129B2, assigned to Dräger Safety AG & Co. KGaA and granted in January 2021, covers an electrochemical gas generator that uses ionic liquid electrolytes containing nitrate ions to produce gaseous ammonia for testing and calibrating gas sensors. It is a calibration and test-equipment patent, not a claim over ammonia sensor construction itself, so it does not directly block most sensor-design work. It is still relevant to anyone building calibration or reference-gas equipment for ammonia sensors in the same electrolyte family.
The technology composition data points to thinner activity in healthcare informatics (G16H, 2.8%) and signalling/alarm integration (G08B, 2.8%) relative to the dense G01N measurement-method core at 70.6%. These lighter-filed branches — software-driven interpretation of sensor output, and networked alarm integration specifically for ammonia detection — carry less prior art per the current record set. A first claim there would need to tie the sensing mechanism to a specific downstream use (a diagnostic threshold, an alarm-triggering logic) rather than restating the electrochemical measurement itself, which sits on much denser prior art.
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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.