Tunable Diode Laser Gas Analysis Patents: Top Filers & Trends 2026
- Concentrated but not locked down. the top 5 assignees hold 26.3% of all 476 records in scope, and the top 10 hold 42.6% — leaving well over half the field to a long tail of single- and few-filing entrants.
- Filing activity doubled. annual filings rose from 13 in 2021 to 26 in 2024, the field's peak year so far, before the expected post-filing publication lag understates 2025-2026.
- Optical hardware dominates the claim space. 75.2% of the 476 records sit in G01N material analysis and 29.8% in G01J radiation measurement, while combustion control (F23N, 7.4%) and temperature measurement (G01K, 5.5%) remain comparatively thin.
Filing growth compares 2021 (13 records) with 2024 (26) — 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 476 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Tunable diode laser gas analysis spans the instruments and methods used to measure gas concentration by tuning a laser across an absorption line and reading the resulting spectrum — line selection, pressure broadening correction, path alignment, dust transmission tolerance, in situ measurement and response speed are the recurring claim themes across this dataset. The 476 records in scope run from 2015 through the current filing year, with the most recent years understated because publication typically lags filing by roughly eighteen months.
The field sits at the intersection of laser physics, optical measurement and industrial process control, which is why classes as different as combustion control and material analysis both carry meaningful shares of the corpus. Reading the assignee concentration alongside the technology composition shows where claim space is already dense and where it is still being defined.
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Filing trends and technology composition
Two views of the same 476 records: how filing activity has moved year over year, and which IPC subclasses the claims fall into.
Filing trend, 2017-2026
Filings moved from 19 in 2017 to a peak of 26 in 2024, with 2021-2024 alone showing a +100% rise. 2025 and 2026 figures (down to 3 in the latest partial year) reflect publication lag rather than a genuine slowdown.
Technology composition by IPC subclass
G01N (material analysis, 75.2% of records) and G01J (radiation measurement, 29.8%) anchor the field. Because records can carry multiple classes, shares are calculated against the full 476-record base and sum to more than 100%.
Shares are the percentage of the 476 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Tunable Diode Laser Gas Analysis with Eureka
This page is one run against one query. Ask Eureka your own question about tunable diode laser gas analysis and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative and most-cited filings
US6282213B1 — Tunable diode laser with fast digital line selection
Describes a tunable diode laser capable of fast digital line selection across a broad wavelength spectrum with no moving parts, using a micromirror array in place of a mechanical grating within a Littman-Metcalf laser cavity. The design allows arbitrary, simultaneous or sequential line selection and is presented as integrable into any diode laser platform.Filed by Interscience, Inc.; granted 2001-08-28.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5317156A | Diagnostic tests using near-infrared laser absorption spectroscopy | 271 |
| 2 | US6064488A | Method and apparatus for in situ gas concentration measurement | 222 |
| 3 | US20030189711A1 | Optical heterodyne detection in optical cavity ringdown spectroscopy | 173 |
| 4 | US6853452B1 | Passive remote sensor of chemicals | 149 |
| 5 | US7012696B2 | Optical heterodyne detection in optical cavity ringdown spectroscopy | 146 |
| 6 | US20070024860A1 | Dual laser high precision interferometer | 145 |
| 7 | US6282213B1 | Tunable diode laser with fast digital line selection | 136 |
| 8 | US5963336A | Chamber effluent monitoring system and semiconductor processing system comprising absorption spectroscopy mea… | 119 |
| 9 | US6888127B2 | Method and apparatus for performing rapid isotopic analysis via laser spectroscopy | 93 |
| 10 | US20030160164A1 | Method and apparatus for performing rapid isotopic analysis via laser spectroscopy | 90 |
Citation counts reflect influence within the searched corpus and favour older filings; they are not a measure of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers say
Three figures from this dataset matter more than the rest for anyone deciding where to file or partner next.
A leader, then a real gap
The leading assignee holds 39 records against a fifth-place count of 20 and a tenth-place count of 12 — a steep drop after the top handful, not a plateau. The top 10 combined reach 42.6% of all records, meaning most of the field's assignees hold only one or two filings each.
Activity accelerated into 2024
Filings rose from 13 in 2021 to 26 in 2024, the field's peak year. Because publication lags filing by roughly 18 months, the drop shown in 2025-2026 reflects records still working through the pipeline rather than declining interest.
Material analysis carries the field
G01N (material analysis and testing) and G01J (radiation and light measurement) between them cover the large majority of records, while combustion control, temperature measurement and optics each sit under 10% — signalling where claim density is lower.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to tunable diode laser gas analysis, with the prior art for and against each one.
Who is filing, and where the gaps sit
Filing activity concentrates around a handful of instrumentation specialists and industrial gas majors, but the ranked list runs 100 names deep with most holding only a few records each.
An instrumentation specialist out front
The leading assignee's 39 records sit well ahead of fifth place at 20, indicating a sustained, focused filing programme rather than a single burst of activity.
Most of the field is fragmented
With the top 10 assignees holding only 42.6% of the 476 records, well over half the corpus belongs to smaller filers, research groups and named inventors rather than a handful of majors.
Inventor-led collaboration pairs
The strongest co-assignee pair recurs across 7 records, suggesting sustained inventor partnerships behind some of the more active filing programmes rather than one-off joint applications.
| Assignee | Recent year | YoY |
|---|---|---|
| Servomex Group Ltd. | 0 | — |
| ZOLO TECHNOLOGIES INC | 0 | — |
| Spectrasensors Inc. | 0 | — |
| Avisa Pharma | 0 | — |
| SOUTHWEST SCIENCES INC | 0 | — |
| Halliburton Energy Services, Inc. (US) | 0 | — |
| L'Air Liquide, Société Anonyme pour l'Étude et l'Exploitation des Procédés Georges Claude | 0 | — |
| Air Products and Chemicals, Inc. | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, partnership scouting or white-space filing.
Check freedom-to-operate around core optical claims
With 75.2% of records touching G01N and a dense most-cited cluster around line-selection and cavity-ringdown methods, a targeted claims review before filing in this space is worthwhile.
Explore claims in Eureka →Track the top assignee's recent filings
A 39-record leader with a sustained programme is worth monitoring directly for signals about where the technology is heading next.
Set up assignee tracking in Eureka →Scope the under-claimed branches
Combustion-control integration and dust-transmission compensation carry comparatively few records relative to the core optical claims, and may offer more open filing space.
Run a white-space search in Eureka →Common questions on this landscape
The dataset ranks 100 assignees by record count, with a clear leader holding 39 records well ahead of the fifth-place holder at 20 and the tenth-place holder at 12. The top 5 assignees combined account for 26.3% of the 476 records in scope, and the top 10 account for 42.6%. That leaves well over half the field distributed across a long tail of smaller filers, meaning no single company controls the technology outright.
Filings grew from 13 in 2021 to 26 in 2024, a +100% increase over that three-year span and the field's peak year so far. The apparent decline shown in 2025 and 2026 is a publication-lag artefact — patents typically publish around 18 months after filing, so the most recent one to two years are always undercounted. Based on the 2021-2024 trend, the underlying filing rate has been rising, not falling.
US6282213B1 claims a tunable diode laser using a micromirror array as a retroreflector within a Littman-Metcalf cavity, enabling fast digital line selection without moving mechanical parts. It is a specific mechanical-optical configuration rather than a claim over tunable diode laser gas analysis broadly, so it constrains designs that rely on micromirror-based line selection more than it blocks alternative tuning architectures. Anyone building a line-selection mechanism should review its claim scope directly rather than assume it covers the whole method.
Relative to the dominant G01N (75.2% of records) and G01J (29.8%) classes, combustion-control integration at 7.4%, temperature measurement at 5.5% and separation-process applications at 2.9% carry noticeably fewer filings. These lower shares point to areas such as combustion-control integration, dust-transmission compensation and response-speed calibration where claim space is comparatively open. Lower filing density does not guarantee an easy grant, but it does suggest less prior art to design around in those specific branches.
The United States leads with 158 filings, followed by the European Patent Office at 71, China at 43, WIPO/PCT filings at 40, the United Kingdom at 29 and Canada at 26. This spread indicates the technology is pursued across multiple major markets rather than concentrated in a single jurisdiction, which is typical for industrial gas-sensing instrumentation sold globally. Companies scoping filing strategy should weigh US and EPO coverage most heavily given their record counts here.
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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.