Corrosion Inhibitor Release Patents: Leaders & White Space 2026
A data-backed view of corrosion inhibitor release patents: filing trends since 2017, the technology classes carrying the most claims, assignee concentration and where white space remains for new filings.
Filing growth = 2021 (29 records) → 2024 (8); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 991 records in scope (CR5), not the ranked leaders only.
What the corrosion inhibitor release patent record actually shows
Corrosion inhibitor release covers the mechanisms by which an active agent is stored, triggered and delivered to a metal surface under attack — from microencapsulation in coatings to vapour-phase dosing in enclosed equipment. The 991 records in scope span 2015 through the current data cut-off, with the bulk of activity concentrated in the years before the most recent, still-incomplete filing years. Because publication lags filing by roughly eighteen months, the apparent decline after 2021 is partly an artefact of the data cut-off rather than a genuine retreat from the technology.
The classification spread is the more telling signal. Claims land as often in detergent and cleaning-composition classes as in classes dedicated to corrosion and metal protection, which tells a filer that the commercially defensible ground here is frequently the delivery vehicle or formulation matrix, not the corrosion chemistry itself.
Filing trends and technology composition
Two views of the same 991-record dataset: how filing activity has moved year over year, and which IPC subclasses carry the claim volume.
Filing activity peaked in 2017 and has since cooled
Annual filings ran as high as 36 in 2017, the peak so far. The 2021-to-2024 span, the last treated as complete once publication lag is accounted for, shows a drop from 29 to 8 filings — a 72% fall. Years after 2024 will continue to fill in as more recent applications publish.
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.
Detergent and coating classes outweigh dedicated corrosion classes
C11D (detergents & cleaning compositions) touches 36.9% of the 991 records, ahead of C09K (23.0%), C09D coatings (18.0%) and C23F corrosion & metal removal (16.4%). Because a single record can carry multiple IPC codes, these shares sum to well over 100% and should be read individually against the full record count, not against each other as a closed pie.
Shares are the percentage of the 991 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Corrosion & Degradation: Corrosion Inhibitor Release Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about corrosion & degradation: corrosion inhibitor release patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaA representative record and how the most-cited work compares
Process for corrosion protection of turbine internal components
A method and system of applying a corrosion inhibitor to the interior component parts of a turbine to provide corrosion protection to the components is disclosed. A blower connected to the turbine introduces air into the turbine's interior. A fog of corrosion inhibitor is added to the air and introduced into the turbine through at least one inlet vent, and introducing the corrosion inhibitor into the inlet vent while the blower is operating so that the corrosion inhibitor is caused to be drawn into and through the interior of the turbine to coat the interior component parts.Filed by General Electric, published 2004-06-24 — an early example of active, mechanical delivery of a corrosion inhibitor rather than a static formulation approach.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20070074316A1 | Nanowires-based transparent conductors | 710 |
| 2 | US20030125222A1 | Microcapsule preparations and detergents and cleaning agents containing microcapsules | 377 |
| 3 | US8049333B2 | Transparent conductors comprising metal nanowires | 333 |
| 4 | WO2007022226A2 | Nanowires-based transparent conductors | 313 |
| 5 | US5804329A | Electroconversion cell | 285 |
| 6 | WO2005090541A1 | Methods of treating surfaces using surface-treating compositions containing sulfonated/carboxylated polymers | 175 |
| 7 | US20060231487A1 | Coated filter media | 163 |
| 8 | US20090129004A1 | Electrically conducting and optically transparent nanowire networks | 159 |
| 9 | US4782891A | Corrosion inhibiting coolant filter | 117 |
| 10 | US20050148479A1 | Fragrance release system | 112 |
Citation counts reward older, earlier-published records within this searched corpus — read them as a signal of historical influence on the field, not as a ranking 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 concentration and classification numbers mean for a filing decision
Three findings from the ranking and classification data that change where a new filer should look.
The top of the field is dense, not diffuse
With 428 of 991 records sitting under five assignees, and the top ten holding 526 (53.1%), this is a field where a handful of established filers occupy a large share of the claim space. A new entrant is more likely to be designing around existing claims than filing into open ground.
A real cooling, not just a publication-lag artefact
The 2021-to-2024 span is the last the data can treat as complete, and it shows a genuine three-year fall in filing volume. Years from 2025 onward will still rise as pending applications publish, so any read of the very latest years should wait for that lag to clear.
Formulation classes outweigh dedicated corrosion classes
C11D detergent and cleaning-composition claims touch more of the corpus than C23F, the class dedicated to corrosion and metal removal. That split suggests the commercially load-bearing claims often sit in the delivery formulation, not the corrosion mechanism itself.
US filing leads but PCT and EPO volume is substantial
The United States receives the largest single share of filings at 258, with Europe (EPO) at 158 and WIPO (PCT) filings at 112 close behind. A filer clearing only the US misses meaningful parallel activity routed through PCT and European offices.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to corrosion & degradation: corrosion inhibitor release patent landscape, with the prior art for and against each one.
Where to take this analysis
The dataset points to specific next questions for a freedom-to-operate check or a new filing strategy.
Map claim boundaries around the top assignees
With 43.2% of records held by five companies, a design-around analysis should start with their specific claim language, not the field average.
Explore assignee claims in EurekaCheck the formulation classes, not just corrosion classes
C11D and C09K carry more record volume than C23F, so a search limited to corrosion-specific classes will miss a large share of the relevant prior art.
Run a cross-class search in EurekaWatch for the 2025–2026 publication catch-up
The apparent decline after 2021 partly reflects publication lag; revisit the trend once more recent applications clear the pipeline.
Track filing trends in EurekaCommon questions about corrosion inhibitor release patents
It covers any claimed mechanism for storing, triggering or delivering a corrosion-inhibiting agent to a metal surface, rather than the inhibitor chemistry alone. This includes microencapsulation in coatings, vapour-phase dosing systems, and mechanical delivery methods like fogging inhibitor into enclosed equipment. The dataset behind this page draws from both title/abstract mentions of corrosion inhibitor release and claims combining inhibitor-release language with corrosion protection terms, giving 991 records in scope from 2015 onward.
The ranking is dominated by a small group of large chemical and industrial companies, with the leader holding 148 records and the top five combined accounting for 43.2% of all 991 records in scope. This is a concentrated field rather than a fragmented one: the top ten alone hold 53.1% of records. The ranking covers 100 companies in total, so it is not a top-50 or top-100 list in the conventional sense — it is the full set the data returns.
Filing volume peaked in 2017 at 36 records and has fallen since, with the 2021-to-2024 span showing a 72% drop from 29 to 8 filings. That span is the most recent one the data can treat as complete, because publication typically lags filing by about 18 months. Figures for 2025 and 2026 will rise as pending applications publish, so it would be premature to call the field in permanent decline based on the newest years alone.
Detergent and cleaning-composition claims (C11D) touch 36.9% of the 991 records, more than any other single class, followed by materials for miscellaneous applications (C09K) at 23.0%, coatings (C09D) at 18.0% and the dedicated corrosion class C23F at 16.4%. Because records often carry multiple IPC codes, a search limited to C23F alone would miss the majority of relevant filings. A thorough freedom-to-operate check needs to span formulation, coatings and materials classes alongside the corrosion-specific one.
The classification data shows heavy claim density in detergent, coating and materials-for-misc-applications classes, but comparatively lighter activity in polymer-composition classes like C08L (6.6%) and C08K (6.5%). Combined with a filing count that has fallen substantially since 2017, this suggests under-claimed ground in polymer-matrix delivery systems rather than in the formulation classes where the established leaders already hold dense claim portfolios. A new filer is better served probing these lighter classes than competing directly in C11D or C09K.
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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.