Structural Adhesive Bonding Patents: Top Companies & Trends 2026
- Filing has cooled, not collapsed. the complete 2021–2024 window shows a 22% decline (76 to 59 filings), but 2025–2026 figures are still filling in under the usual 18-month publication lag.
- No single assignee dominates. the leader holds 226 of 2,326 records and the top 5 combined reach only 21.5% of all records in scope — this is a field with a long tail, not a gatekeeper.
- Adhesives chemistry outweighs joint engineering. C09J (adhesives) appears in 41.8% of records versus 6.7% for B23K (welding/brazing), showing where claim density actually concentrates.
Filing growth compares 2021 (76 records) with 2024 (59) — 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 2,326 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape covers 2,326 published records filed or published between 2015 and mid-2026 that combine structural adhesive bonding — adhesive joints, bonded joints — with process-control language: surface pretreatment, cure schedule, peel strength, durability ageing, bond line thickness. That search construction pulls in both the chemistry side (adhesive formulations) and the process side (how a bonded joint is made repeatable), which is why the technology composition spans polymer classes and shaping/joining classes at once.
Because publication lags filing by roughly 18 months, the 2025 and 2026 counts in the trend chart are still incomplete — read the most recent two years as a floor, not a ceiling. The 2021–2024 window is the most recent period that can be treated as settled, and it already shows a measurable pullback in filing volume.
Filing trends and technology composition
Two views of the same 2,326-record dataset: filing activity over time, and how records distribute across IPC subclasses. Because a single record can carry multiple IPC codes, the subclass shares below sum to more than 100% of records.
Filing peaked in 2020, then eased back
Annual filings rose to a peak of 78 in 2020, then the most recent complete comparison — 2021 (76) versus 2024 (59) — shows a 22% decline. Treat 2025 and 2026 as undercounted rather than as evidence the decline continued.
Adhesives chemistry leads; joining processes are a minority share
C09J (adhesives) covers 41.8% of records and B32B (layered products) 20.4%, while B23K (welding, soldering & brazing) sits at just 6.7% — confirming this corpus is weighted toward formulation and laminate structure rather than mechanical joining.
Shares are the percentage of the 2,326 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Structural Adhesive Bonding with Eureka
This page is one run against one query. Ask Eureka your own question about structural adhesive bonding and every answer comes back with the patent numbers behind it.
Try EurekaA representative filing and the most-cited prior art
Method and apparatus for measuring the peel strength of an adhesively bonded paper joint
This invention relates to an apparatus and method for measuring the peel strength of a paper joint which is adhesively bonded. Such structures of this type, generally, allow the peel strength of the adhesively bonded joint to be accurately and repeatably measured in an inexpensive manner.Filed by Westvaco Corporation, 1995-04-11 (US5404751A). Its claims sit squarely on the process-control side of this landscape — measuring, not forming, a bonded joint.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6626849B2 | MRI compatible surgical biopsy device | 612 |
| 2 | US5516581A | Removable adhesive tape | 598 |
| 3 | US6506577B1 | Synthesis and crosslinking of catechol containing copolypeptides | 383 |
| 4 | US20100003904A1 | High speed flat lapping platen, raised islands and abrasive beads | 381 |
| 5 | US20030109803A1 | MRI compatible surgical biopsy device | 350 |
| 6 | WO1992011333A1 | Removable adhesive tape | 285 |
| 7 | US6803420B2 | Two-phase, water-absorbent bioadhesive composition | 238 |
| 8 | US5592562A | Inspection system for cross-sectional imaging | 234 |
| 9 | US20160311165A1 | Multiaxis fiber reinforcement for 3D printing | 233 |
| 10 | US5719952A | Inspection system for cross-sectional imaging | 222 |
Citation counts inside a searched corpus favour older filings that have had more time to accumulate citations — read them as a signal of influence within this dataset, not as a ranking of current technical importance.
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 about this field
Three findings that shape where to file and where not to compete.
The top 5 assignees hold a fifth of the field
The leading assignee accounts for 226 records and the top 5 combined reach 501, or 21.5% of all records in scope. That leaves close to four-fifths of filings spread across a long tail of single- and few-filing entrants — a field where a strong niche filing can still stand out rather than being buried under one dominant portfolio.
Volume has pulled back from its 2020 peak
Annual filings peaked at 78 in 2020 and the most recent complete comparison shows 2021's 76 filings falling to 59 by 2024, a 22% decline. That is a genuine cooling in the settled data, not an artefact of publication lag — though 2025-2026 figures are still incomplete and should not be read as continuing the same slope.
Adhesive chemistry, not mechanical joining, dominates claim space
C09J (adhesives) appears in 41.8% of the 2,326 records and B32B (layered products) in 20.4%, while B23K (welding, soldering & brazing) appears in only 6.7%. Formulation and layered-structure claims are where the density sits; joining-process hardware claims are comparatively open.
US and EPO dominate filing venues
The United States receives 758 filings and the EPO 371, with WIPO PCT filings at 200 — well ahead of Australia, Canada and Japan. Any freedom-to-operate check for this technology should start with US and European prosecution history before extending to other jurisdictions.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to structural adhesive bonding, with the prior art for and against each one.
Who is filing, and where the ground is open
No single company controls this field. The leader's share and the top-10 combined share both leave most of the record count to a long tail, and recent-year momentum has gone flat across the assignees with the largest historical portfolios.
One diversified filer leads, without dominating
The top-ranked assignee holds 226 of 2,326 records, roughly 9.7% of the corpus on its own — enough to lead the ranking but far short of a controlling position, and its recent-year filing activity has flattened along with the rest of the top tier.
The top 10 combined reach under a third of the field
681 records across the ten highest-ranked assignees amount to 29.3% of all 2,326 records in scope. Even combining the ten largest portfolios leaves more than two-thirds of filings to companies outside that group — a structural signal that entry is not blocked by a small cartel of incumbents.
Historical leaders show zero filings in the latest year
Several of the largest historical filers show 0 records in the most recent year, a -100% year-over-year change. Given the roughly 18-month publication lag, this most likely reflects filings still working through the pipeline rather than an actual stop in R&D — but it does mean the visible leaderboard understates who is currently active.
| Assignee | Recent year | YoY |
|---|---|---|
| 3M Innovative Properties Company | 0 | -100% |
| Bostik SA | 0 | -100% |
| Greatbatch Ltd | 0 | — |
| The Boeing Company | 0 | — |
| James Hardie International Finance BV | 0 | — |
| Picosecs Company | 0 | — |
| 3M Company | 0 | — |
| James Hardie Technology Ltd | 0 | — |
Where to take this analysis
The dataset points to a field with open structural gaps rather than a locked-down core. Two directions make sense from here.
Map claim boundaries in bond line thickness control
This sub-area shows thinner filing density than the core adhesive-formulation classes, but it sits directly on the process-control language that defines this search. A freedom-to-operate check focused specifically on thickness-control claims, rather than adhesive chemistry broadly, is likely to surface fewer blocking references.
Explore this branch in EurekaTrack the pipeline behind the flat leaderboard
Several of the largest historical assignees show zero filings in the latest year, which is more likely a publication-lag artefact than a real exit. Monitoring newly published applications from these same assignees over the next few quarters will clarify whether they are still active in this space.
Set up monitoring in EurekaCommon questions about structural adhesive bonding patents
The leading assignee in this dataset holds 226 of the 2,326 records in scope, which is the single largest position but still under 10% of the field. The top 5 assignees combined reach 501 records, or 21.5% of all records in scope, and the top 10 combined reach 29.3%. That leaves the majority of filings spread across a long tail of smaller and single-filing entrants, so no one company controls prosecution in this space.
Filing peaked at 78 records in 2020, and the most recent complete year-over-year comparison, 2021 to 2024, shows a 22% decline from 76 to 59 filings. That is a real pullback in the settled data. The 2025 and 2026 figures shown in any trend chart are still incomplete because publication lags filing by roughly 18 months, so they should not yet be read as a continuation of that decline.
Adhesive formulation chemistry, classified under IPC subclass C09J, appears in 41.8% of the 2,326 records in scope, making it the single largest technology area by a wide margin. Layered products and laminates (B32B) follow at 20.4%, with condensation and addition polymer classes also well represented. Mechanical joining processes like welding, soldering and brazing (B23K) appear in only 6.7% of records, indicating that claim density sits mainly in materials and layered structure rather than joining hardware.
Sub-areas tied to process control and durability testing, such as bond line thickness control, in-line cure schedule monitoring and durability ageing test protocols, carry lighter filing density than the core adhesive-chemistry classes. Surface pretreatment for dissimilar substrates and hybrid welded-bonded joint designs also show room relative to the crowded formulation space. These are reasonable starting points for a novelty search precisely because the dominant assignees have concentrated their claims elsewhere.
US5404751A, filed by Westvaco Corporation and dated 1995-04-11, claims an apparatus and method specifically for measuring peel strength of an adhesively bonded paper joint. Its scope is a measurement method, not a bonding process or formulation, so it constrains testing-equipment claims aimed at that specific measurement rather than claims over adhesive chemistry, cure schedules or the bonded joint itself. Anyone designing a new peel-strength test rig for paper joints should review its claim language closely; developers working on formulation, cure or non-paper substrates are largely outside its scope.
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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.