Electrochemical Toxic Gas Sensors Patents: Leaders & Trends 2026
- 43.0% concentration at the top. The five leading assignees account for 408 of 949 records in scope — filing is concentrated, not fragmented, in this field.
- Filings down 77% since the 2021 peak years. From 56 records in 2021 to 13 in 2024 (the last complete year), signalling that core claim space is filling rather than opening.
- Software and connectivity classes now outweigh pure sensor chemistry. G05B, H04L, H04B and G06N each cover roughly a quarter of records, alongside G01N's 54.4% — the claims are shifting toward data and control layers.
Filing growth compares 2021 (56 records) with 2024 (13) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 949 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Electrochemical toxic gas sensors convert a chemical reaction at an electrode into a measurable current, and the patent activity in this space clusters around three recurring problems: cross sensitivity to interfering gases, electrolyte drying or drift that shortens usable sensor life, and the calibration and replacement cycles that drive total cost of ownership for industrial safety operators. The 949 records in scope were selected specifically around these operational pain points rather than around sensor chemistry alone.
Filing activity peaked in 2018 at 154 records and has fallen since, with 2021's 56 records dropping to 13 by 2024 — the last year the dataset treats as complete, since publication typically lags filing by around 18 months. Receiving-office data shows the United States as the dominant venue, with Europe, WIPO/PCT and the UK trailing well behind, which points to where enforcement and freedom-to-operate risk actually concentrates.
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Filing trend and technology composition
The following views break down the 949 records in scope by year and by IPC subclass, showing both the pace of filing and where technical claims actually sit.
Filings peaked in 2018, then declined sharply
Filings ran from 42 records in 2017 to a peak of 154 in 2018, then declined; the drop from 56 records in 2021 to 13 in 2024 marks a 77% fall over that span. Treat 2025 and 2026 as incomplete rather than as evidence of a further slowdown.
Sensor chemistry claims now share space with software and connectivity classes
G01N (material analysis and testing) covers 54.4% of the 949 records, the largest single class, consistent with core electrochemical sensing claims. But G05B (27.6%), H04L (27.0%), H04B (24.4%) and G06N (23.7%) each cover roughly a quarter of records, and G06F and H04W each cover around a tenth — evidence that a large share of recent activity is claiming the control, transmission and analytics layer around the sensor rather than the electrode chemistry itself. Because records can carry multiple classes, these shares sum to more than 100% of the record total.
Shares are the percentage of the 949 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Electrochemical Toxic Gas Sensors with Eureka
This page is one run against one query. Ask Eureka your own question about electrochemical toxic gas sensors and every answer comes back with the patent numbers behind it.
Try EurekaA recent electrolyte claim worth reading in full
Electrochemical gas sensor and electrolyte for an electrochemical gas sensor
An electrolyte for an electrochemical gas sensor and an electrochemical gas sensor are provided. The electrolyte includes at least one cyclic compound based on a pyridinium, piperidinium, pyrrolidinium or pyrrolium ring, as well as at least 5% water.Filed by Dräger Safety AG & Co. KGaA, published November 2024 — one of the more recent electrolyte-composition filings in scope, addressing electrolyte drying directly.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US9325516B2 | Power receptacle wireless access point devices for networked living and work spaces | 1,045 |
| 2 | US20190339688A1 | Methods and systems for data collection, learning, and streaming of machine signals for analytics and mainten… | 972 |
| 3 | US20200348662A1 | Platform for facilitating development of intelligence in an industrial internet of things system | 732 |
| 4 | US20210157312A1 | Intelligent vibration digital twin systems and methods for industrial environments | 715 |
| 5 | US20180284758A1 | Methods and systems for industrial internet of things data collection for equipment analysis in an upstream o… | 598 |
| 6 | US20200225655A1 | Methods, systems, kits and apparatuses for monitoring and managing industrial settings in an industrial inter… | 562 |
| 7 | US20200103894A1 | Methods and systems for data collection, learning, and streaming of machine signals for computerized maintena… | 513 |
| 8 | US20190033845A1 | Methods and systems for detection in an industrial internet of things data collection environment with freque… | 409 |
| 9 | WO2019028269A2 | Methods and systems for detection in an industrial internet of things data collection environment with large … | 391 |
| 10 | US20220108262A1 | Industrial digital twin systems and methods with echelons of executive, advisory and operations messaging and… | 386 |
Citation counts favour older records inside any searched corpus; treat them as a signal of influence within this dataset, not as a ranking of current technical importance.
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Browse MCP servers →What the numbers mean for a filing decision
Three patterns stand out once the record set is broken down by concentration, technology class and timing.
Filing sits with a small group of safety-equipment incumbents
The five leading assignees combined hold 408 of the 949 records in scope, and the top ten extend that to 501 records, or 52.8%. A new entrant filing on core electrochemical cell design should expect dense prior art from a small number of established industrial safety companies rather than a fragmented field.
Core sensor-chemistry filing has cooled since 2021
Filings fell from 56 records in 2021 to 13 in 2024, the last year the dataset treats as complete. That is a real decline in filing volume, not evidence the technology itself has stalled — occupied claim space and a maturing product category are the more likely explanations.
Claims are migrating from the electrode to the system around it
Material-analysis claims (G01N) still lead, but control systems (G05B), digital transmission (H04L/H04B) and AI-based computing (G06N) each appear in roughly a quarter of records. This suggests companies increasingly protect the calibration, drift-correction and networked-monitoring layer rather than the electrochemical cell alone.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to electrochemical toxic gas sensors, with the prior art for and against each one.
Who is filing, and where the gate sits
A small set of industrial safety and instrumentation companies dominates the ranked assignees, with a long tail of single- or few-filing entrants behind them.
One filer holds a disproportionate share
The leading assignee's 251 records dwarf the fifth-place figure of 23 and the tenth-place figure of 16, meaning the concentration at the very top is driven by one company far more than by the group beneath it.
A steep drop-off after the leader
Fifth place holds 23 records and tenth place 16 — a gentler slope than the leader-to-second gap, suggesting the mid-field of safety-equipment and instrumentation makers compete more closely with one another than any of them do with the top filer.
Momentum has stalled even among the leaders
Several of the most heavily-filing assignees show zero records in the latest tracked year, some with a -100% year-on-year change. Given publication lag, this likely overstates the slowdown, but it is consistent with the broader 2021-to-2024 decline in filing volume.
| Assignee | Recent year | YoY |
|---|---|---|
| Strong Force IOT Portfolio 2016, LLC | 0 | -100% |
| Honeywell International Inc. | 0 | — |
| Mallinckrodt Pharmaceuticals Ireland Ltd. | 0 | — |
| Dräger Safety AG & Co. KGaA | 0 | -100% |
| Industrial Scientific Corporation | 0 | — |
| MSA Europe GmbH | 0 | — |
| Life Safety Distribution AG | 0 | — |
| Drägerwerk AG & Co. KGaA | 0 | — |
Where to take this analysis
The patterns above point to specific next questions for an IP or R&D team working in this space.
Check freedom-to-operate around electrolyte composition
The 2024 Dräger filing on cyclic-compound electrolytes shows this sub-area is still active. Any new electrolyte formulation claim should be checked against recent filings from the top assignees before development proceeds.
Explore electrolyte claims in EurekaMap the control-and-connectivity layer separately from the sensor cell
With G05B, H04L, H04B and G06N each covering roughly a quarter of records, calibration and monitoring software claims deserve their own search rather than being folded into a sensor-chemistry query.
Run a layered IPC search in EurekaRevisit the white-space chips against your own product roadmap
Cross-sensitivity compensation and field-replaceable cartridge design show thinner claim density than the core cell chemistry — worth a focused prior-art check before committing engineering time.
Search white space in EurekaCommon questions about this landscape
Filing is concentrated: the leading assignee alone holds 251 of the 949 records in scope, far ahead of fifth place at 23 and tenth place at 16. The top five assignees combined hold 408 records, or 43.0% of all records in scope, and the top ten extend that to 52.8%. This means a small group of industrial safety and instrumentation companies controls a large share of the documented claim space, while the remaining assignees form a long tail with far fewer filings each.
No — filing peaked in 2018 at 154 records and has declined since, falling from 56 records in 2021 to 13 in 2024, a 77% drop over that span. 2024 is the most recent year the dataset treats as complete; 2025 and 2026 figures are still filling in because publication typically lags filing by around 18 months. So the decline should be read as a real multi-year trend through 2024, not as a claim about the very latest years.
The search underlying this dataset targeted specific operational pain points: cross sensitivity to interfering gases, electrolyte drying and baseline drift, calibration frequency, and sensor replacement cycles. These are the practical issues that determine total cost of ownership for industrial safety operators using electrochemical gas detectors, rather than pure electrochemistry research questions. The 2024 Dräger filing on a cyclic-compound electrolyte with at least 5% water content is a direct example of a drying/drift-focused claim.
Increasingly the latter. G01N, covering material analysis and testing, still leads at 54.4% of the 949 records, consistent with core electrochemical-cell claims. But control systems (G05B, 27.6%), digital transmission (H04L and H04B, 27.0% and 24.4%), and AI-based computing (G06N, 23.7%) each appear in roughly a quarter of records, showing that a substantial portion of recent filing protects calibration, drift-correction and networked-monitoring functions built around the sensor rather than the electrode chemistry alone.
Based on the technology composition and momentum data, thinner coverage appears in areas like cross-sensitivity compensation algorithms, field-replaceable cartridge design, and low-temperature electrolyte formulations, relative to the dense filing around core electrochemical cell chemistry and general connectivity claims. This is not a guarantee of a clean filing path — it reflects relative density in this specific dataset, not a full freedom-to-operate clearance, so a targeted prior-art search on any specific claim is still necessary before filing.
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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.