Hot Melt Adhesive Patents: Top Companies & Filing Trends 2026
- Filing has plateaued. annual filings rose from 123 in 2017 to a peak of 137 in 2022, then declined — a flat-to-declining trend rather than sustained growth.
- Filing activity is thinly spread across offices. Europe (645), the US (561) and China (526) each hold a meaningful share, with WIPO PCT filings (314) suggesting cross-border strategies are common but not dominant.
- The best-cited prior art is decades old. the most-cited record, US6319979B1, dates from a low-application-temperature ethylene alpha-olefin formulation family that still anchors citation counts across the corpus.
What the hot melt adhesive patent record shows
Hot melt adhesive patenting sits at the intersection of polymer chemistry and applied bonding performance: claims cluster around open time, viscosity at application, heat resistance and tackifier formulation rather than novel base chemistries alone. The dataset spans 3,257 patent families filed between 2015 and 2026, concentrated in C09J adhesive compositions with substantial overlap into C08L polymer compositions and C08G condensation polymers, indicating that most inventive activity is formulation and process work layered on established polymer platforms.
Filing has not grown steadily. It rose toward a peak in 2022 and has since fallen back, and because publication typically lags filing by around 18 months, the most recent years in the trend understate real filing activity. Reading the curve as flat-to-declining rather than as a growth story is the more defensible interpretation given what is currently visible.
Filing trend and technology composition
Two views of the same 3,257-family corpus: how filing volume has moved year over year, and how those filings distribute across IPC subclasses.
Filings peaked in 2022, then declined
Annual filings moved from 123 in 2017 to a peak of 137 in 2022 before falling to 10 in the most recent (partial) year. The midpoint sits at the peak year itself, consistent with a maturing rather than expanding filing base.
C09J dominates, with polymer-composition overlap
C09J (Adhesives) covers 3,166 of the records, essentially the whole corpus by design of the search. Meaningful overlap appears in C08L (1,087), C08G (608) and B32B (427, layered products), while smaller but notable counts in A61F (157) and A61L (125) point to medical-bonding applications as a secondary but real filing theme.
Shares are the percentage of the 3,257 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Hot Melt Adhesive Technology with Eureka
This page is one run against one query. Ask Eureka your own question about hot melt adhesive technology and every answer comes back with the patent numbers behind it.
Try EurekaThe prior art that still shapes claim drafting
US6387449B1 — Reactive hot melt adhesive (H.B. Fuller Company)
A hot melt curing urethane adhesive built from an isocyanate compound, a polyester-polyol compound, a reactive tackifying resin using non-polar polyols, and a thermoplastic polymer. The claimed composition targets substantial initial green strength alongside cured bond strength, extended pot life, long open times and high heat resistance once cured — properties that are normally traded off against one another in reactive hot melt formulation.Granted 2002-05-14. Assigned to H.B. Fuller Company.
View full record| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6319979B1 | Package comprising low application temperature hot melt adhesive comprising ethylene alpha-olefin | 229 |
| 2 | US5294657A | Adhesive composition with decorative glitter | 222 |
| 3 | US5530054A | Elastomeric ethylene copolymers for hot melt adhesives | 188 |
| 4 | US6143818A | Hot melt adhesive based on ethylene-propylene rubber (EPR) and semicrystalline olefinic polymers | 173 |
| 5 | US6107430A | Low application temperature hot melt adhesive comprising ethylene alpha -olefin | 170 |
| 6 | US6582829B1 | Hot melt adhesive composition comprising homogeneous ethylene interpolymer and block copolymer | 161 |
| 7 | US5021507A | Arcylic modified reactive urethane hot melt adhesive compositions | 160 |
| 8 | WO1998003603A1 | Hot melt adhesives | 147 |
| 9 | US5257491A | Method of packaging an adhesive composition and corresponding packaged article | 142 |
| 10 | US6329468B1 | Hot melt adhesive based on semicrystalline flexible polyolefins | 134 |
Citation counts inside this corpus favour older filings; treat them as a signal of influence on later drafting, not of current commercial relevance.
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Browse MCP servers →What the data means for filing strategy
Three patterns stand out once the raw counts are read against filing dates, geography and citation behaviour.
Growth has stalled since 2022
The corpus peaked at 137 families in 2022 and has trended down since, with the caveat that 18-month publication lag understates the most recent year. This is not a technology in an early growth phase; it reads as a mature filing base with cyclical rather than compounding activity.
No single office dominates prosecution
Europe, the United States and China each carry a substantial share of filings, with WIPO PCT activity (314) well behind the top three. That spread means freedom-to-operate work has to clear at least three major jurisdictions rather than one anchor market.
Foundational ethylene alpha-olefin art still anchors the field
The most-cited records are ethylene alpha-olefin and EPR-based low-application-temperature formulations from the 1990s and early 2000s. New filings in adjacent formulation space are still drafted against this older art, which is a strong signal of where prior-art searches need to start.
Co-filing is limited and mostly intra-group
Only ten co-assignee pairs appear in the corpus, and the strongest links connect related corporate entities of the same group rather than cross-company joint filings. Genuine inter-company collaboration on hot melt formulations is rare in the patent record.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to hot melt adhesive technology, with the prior art for and against each one.
Who holds the claim space, and where the front line has gone quiet
Recent-year momentum tells a different story from cumulative counts: several of the historically largest filers show zero activity in the latest year, which is at least partly a publication-lag artefact but is worth checking against internal roadmaps before assuming the field has gone cold.
Henkel's filing has gone quiet in the most recent data
Henkel-affiliated entities show the strongest co-assignee linkages in the corpus historically, but recent-year momentum reads as zero with a -100% year-on-year change. Given the 18-month publication lag, this likely understates true recent activity rather than signalling a genuine exit.
H.B. Fuller and Dow show the second-strongest filing linkage
The pairing between H.B. Fuller Licensing & Financing and Dow Chemical is the second-strongest co-assignee link in the dataset, suggesting shared formulation or supply relationships that surface in joint filings even though most patenting in this field is done independently.
Multiple long-standing filers show no latest-year output
Bostik, National Starch and Chemical Investment Holding, and other historically active assignees all register zero filings in the latest partial year. Read alongside the overall filing decline since 2022, this is consistent with a market where claim space is already densely occupied and new filing is more defensive than expansive.
| Assignee | Recent year | YoY |
|---|---|---|
| Henkel AG & Co. KGaA | 0 | -100% |
| Bostik SA | 0 | — |
| National Starch and Chemical Investment Holding Corporation | 0 | — |
| H.B. Fuller Licensing & Financing, Inc. | 0 | — |
| Atofina Adhesives Inc. | 0 | — |
| H.B. Fuller Company | 0 | -100% |
| Henkel IP & Holding GmbH | 0 | — |
| Dow Global Technologies LLC | 0 | — |
Where to take this analysis
The dataset points to a mature, geographically spread field with a handful of under-claimed formulation branches. The next steps depend on whether the goal is freedom-to-operate, white-space filing, or competitive monitoring.
Run a freedom-to-operate check against the top-cited art
The most-cited records in this corpus are ethylene alpha-olefin and EPR-based formulations that predate most current filings. Any new low-application-temperature or high-heat-resistance formulation should be checked against these before drafting claims.
Explore prior art in EurekaMap the medical-bonding overlap before committing formulation claims
A61F and A61L overlap with the core C09J corpus is small but consistent, pointing to sterilisable and implant-grade hot melt as a narrower but less contested filing area.
Analyse this branch in EurekaTrack assignee momentum rather than cumulative rank
Several historically dominant filers show zero recent-year output. Confirming whether this reflects publication lag or an actual pullback changes how competitive threat should be weighted.
Set up assignee monitoring in EurekaCommon questions on hot melt adhesive patents
No, not currently. Filings rose from 123 in 2017 to a peak of 137 in 2022, then declined to 10 in the latest partial year. Because patent publication typically lags filing by around 18 months, the most recent year understates true activity, but even accounting for that, the trend since 2022 reads as flat to declining rather than growing.
Europe (EPO) leads with 645 filings, followed by the United States at 561 and China at 526. WIPO PCT filings sit at 314, with Japan and Australia further behind. The spread across three major offices means a freedom-to-operate review needs to cover Europe, the US and China rather than treating any single jurisdiction as sufficient.
US6387449B1, assigned to H.B. Fuller Company, claims a reactive hot melt urethane adhesive built from an isocyanate compound, a polyester-polyol compound, a reactive tackifying resin using non-polar polyols, and a thermoplastic polymer. It targets a combination of initial green strength, cured bond strength, extended pot life, long open time and high heat resistance in one formulation. Anyone drafting claims around reactive hot melt urethane systems with similar property combinations should review this patent's specific component ratios and definitions closely.
Henkel-affiliated entities show the strongest historical co-assignee linkages in this corpus, and H.B. Fuller and Dow Chemical form the second-strongest filing pairing. However, recent-year momentum data shows several of these historically large filers, including Henkel and Bostik entities, at zero filings in the latest year, which may reflect publication lag as much as an actual slowdown in their programmes.
The lower-density IPC overlaps point to the more open areas: medical-grade hot melt for implant bonding (A61F), sterilisable formulations (A61L), and vinyl-addition polymer tackifier systems (C08F) all carry meaningfully smaller record counts than the C09J core. These branches are not unclaimed, but they carry less filing density than mainstream EVA and reactive urethane hot melt formulations, which makes them a reasonable starting point for narrower claim drafting.
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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.