UV and Light-Curable Adhesives Patents: Leaders & White Space 2026
- Filing has cooled sharply since its 2018 peak of 25 families, with the 2022 midpoint down to just 2 — a decade-long pullback, not a temporary dip.
- C09J and C08F dominate the IPC mix (288 and 155 records respectively), while optical-element crossover (G02B, 36 records) marks where display and optics claims now overlap adhesive chemistry.
- Recent-year momentum has gone flat across every major assignee, including Henkel entities showing a -100% YoY drop to zero filings in the latest tracked year.
What the filing record shows
UV and light-curable adhesive chemistry sits at the intersection of photoinitiator formulation, cure-depth control and shadow-cure workarounds — the problem of bonding surfaces where UV light cannot reach directly. The dataset covers 303 patent families published between 2015 and mid-2026, concentrated overwhelmingly in the C09J adhesives subclass with heavy secondary activity in C08F addition-polymer chemistry. Filing offices split across the United States, Japan, Europe, South Korea, WIPO and China in a fairly even spread, suggesting the technology is filed as a global platform rather than a single-jurisdiction defensive play.
The filing trend peaked in 2018 and has declined toward near-zero by the 2022 midpoint, with the most recent year understated by the usual 18-month publication lag. That decline does not mean the chemistry is exhausted — dense claim coverage in core cure and photoinitiator formulations can just as easily explain a slowdown in new filing as market saturation would.
Filing trend and technology composition
Two views of the same 303-family dataset: how filing volume has moved year over year, and how those families distribute across IPC subclasses.
A decade of front-loaded filing
Filings rose to a peak of 25 in 2018, then fell steadily through the 2022 midpoint of 2 records, trailing off toward the 2026 cut-off. Read the final one to two years as incomplete rather than as a real cliff.
Adhesives chemistry with an optics overlay
C09J (288) and C08F (155) anchor the core adhesive and polymer chemistry. B32B laminates, C08L compositions and G02B optical elements each appear in the 33-49 record range, marking where curable adhesives get claimed alongside display stacks, touch sensors and layered optical assemblies rather than as standalone chemistry.
Shares are the percentage of the 303 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on UV and Light-Curable Adhesives with Eureka
This page is one run against one query. Ask Eureka your own question about uv and light-curable adhesives and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records in this corpus
UV light curable adhesive and device with UV light curable adhesive (US20200263057A1)
Adhesives Research's filing discloses a UV-curable adhesive built from a bi-active monomer, a polymerizable oligomer, a primary photoinitiator and a monomer scavenger. The scavenger is activated by the same photoinitiator step that cures the bi-active monomer, and the stated effect is a measurable drop in residual monomer content in the cured adhesive compared with an otherwise identical formulation lacking the scavenger.Filed by Adhesives Research, Inc.; published 2020-08-20.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6331080B1 | Optical fiber connector using colored photocurable adhesive | 147 |
| 2 | JP2012046658A | Photocurable adhesive composition for pasting optical display or touch sensor and optical display or touch se… | 133 |
| 3 | US6057382A | Epoxy/thermoplastic photocurable adhesive composition | 126 |
| 4 | US5380387A | Lens blocking/deblocking method | 105 |
| 5 | US5426166A | Urethane adhesive compositions | 91 |
| 6 | US6918984B2 | Photocurable adhesive compositions, reaction products of which have low halide ion content | 74 |
| 7 | JP2010090204A | Photocurable adhesive composition | 60 |
| 8 | CN102153953A | 可光固化的粘着组合物 | 57 |
| 9 | US6153302A | Epoxy/thermoplastic photocurable adhesive composition | 56 |
| 10 | JP2011511851A | 化学線硬化型接着剤組成物 | 55 |
Citation counts favour older filings simply by virtue of longer exposure time in the corpus — treat them as a measure of influence on later filers, not as a ranking of current relevance.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
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Three read-outs from the dataset that matter for deciding where to file next.
Momentum has reversed, not accelerated
The peak year of 25 families in 2018 gives way to a midpoint of just 2 by 2022. Even allowing for publication lag understating the last one to two years, the multi-year decline predates that lag window and points to a genuine slowdown in new filing activity.
Core adhesive claims dwarf the optics crossover
C09J adhesive-specific claims outnumber G02B optical-element claims by roughly eight to one. That gap is where the next wave of activity is more likely to show up — as optical and display integration work builds on an already dense adhesive core rather than replacing it.
Every major holder has gone quiet
Recent-year momentum data shows every tracked major assignee — including Henkel entities down -100% YoY — at zero filings in the latest year. A flat field like this rewards a well-drafted new claim more than it punishes a late entrant, since no one is currently defending fresh ground.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to uv and light-curable adhesives, with the prior art for and against each one.
Who holds the ground, and where it is open
Co-assignee activity is sparse — only 10 pairs across the entire dataset, and the strongest pairs max out at two shared filings — which points to a field of largely independent filers rather than tight consortium activity.
Little collaborative filing
With only ten co-assignee pairs across 303 families, and the strongest pairs (Essilor International with Jallouli Aref; Denka with Kurimura Hiroyuki) capped at two shared filings, most patents in this space are filed by a single entity working alone rather than through joint development agreements.
US leads a fairly even six-way split
United States filings lead at 66, followed closely by Japan (41), Europe (40), South Korea (39), WIPO (39) and China (37). No single office accounts for more than about a fifth of total filings, meaning defensibility has to be assessed office by office rather than assumed from one jurisdiction.
Established holders have stopped filing
Assignees with historical depth in this space — Essilor, Denka, Henkel entities, 3M entities — all show zero filings in the latest tracked year. That is consistent with a technology where the core chemistry is well claimed and current effort has shifted elsewhere, or has not yet been published due to filing lag.
| Assignee | Recent year | YoY |
|---|---|---|
| Essilor International | 0 | — |
| Denka Company Limited | 0 | — |
| Henkel AG & Co. KGaA | 0 | -100% |
| Henkel IP & Holding GmbH | 0 | — |
| 3M Innovative Properties Company | 0 | — |
| 3M Company | 0 | — |
| E.I. du Pont de Nemours and Company | 0 | — |
| Nitto Denko Corporation | 0 | -100% |
Where to take this analysis
The filing data narrows the question; answering it for a specific formulation or claim requires going deeper.
Map a specific formulation against the cited prior art
The five most-cited records span optical fiber bonding, display/touch-sensor lamination and lens blocking — check a candidate formulation against these before drafting claims in adjacent optical-bonding territory.
Explore prior art in EurekaTrack assignee momentum before committing R&D
With every major holder at zero filings in the latest year, confirm whether that reflects genuine pullback or unpublished pending applications before assuming the space is open.
Run a live assignee search in EurekaTest claim language against under-claimed branches
Shadow-cure and oxygen-inhibition approaches show thinner density than the C09J/C08F core — a targeted search will confirm whether that gap is real or just under-indexed in this dataset.
Search white space in EurekaCommon questions on UV and light-curable adhesive patents
The dataset shows a peak of 25 families in 2018 falling to just 2 by the 2022 midpoint, and this decline predates any publication-lag effect, which only really understates the last one to two years. A likely explanation is that core photoinitiator and cure-depth claims filed in the mid-2010s created dense prior art that raised the bar for new filings. It does not mean the underlying chemistry stopped being used commercially — filing volume and commercial adoption are different signals, and a mature, well-claimed core can coexist with active manufacturing.
Assignees with recurring activity in this space include Essilor International, Denka, Henkel-affiliated entities, and 3M-affiliated entities, based on the co-assignee and momentum data in this dataset. Notably, every one of these tracked assignees shows zero filings in the latest recorded year, including a -100% year-on-year drop for Henkel entities. That flat momentum across established holders suggests the competitive picture has shifted, either toward quieter defensive holding or toward filings not yet published.
Shadow cure refers to the challenge of curing UV-curable adhesive in areas a UV light source cannot directly reach, such as under an opaque component or inside a bonded joint. It is one of the search terms explicitly used to build this dataset because it represents a persistent formulation problem distinct from simple photoinitiator selection. Claims addressing shadow-cure chemistry, often via secondary cure mechanisms like moisture or heat, sit in a comparatively thinner part of the claim landscape than core UV photoinitiator formulations.
Co-assignee analysis shows only 10 pairs of jointly filed patents across the full 303-family dataset, and the strongest pairs share just two filings each. That points to a landscape of largely independent single-assignee filings rather than one dominated by a small number of tightly collaborating firms. Combined with a fairly even six-way split across US, Japan, European, South Korean, WIPO and Chinese filing offices, the picture is one of moderate rather than extreme concentration.
US20200263057A1, filed by Adhesives Research and published in 2020, claims a UV-curable adhesive combining a bi-active monomer, a polymerizable oligomer, a primary photoinitiator and a monomer scavenger, where the scavenger is activated during the same photopolymerization step to reduce residual monomer content. Anyone formulating a UV adhesive that reduces residual monomer through a scavenger activated by the curing photoinitiator itself should review this filing's claim scope closely. Alternative approaches, such as reducing residual monomer through formulation ratio changes rather than a co-activated scavenger, may sit outside its claim boundaries but should be checked against the full claim set, not just the abstract.
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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.