Barrier Coatings for Fibre Packaging Patents: Leaders & Trends 2026
- 13.7% of all records sit with the top five ranked assignees, well short of the concentration a mature field would show — this is still a contested space.
- Filings peaked in 2022 at 577 and 2021-to-2024 volumes are down 15%, though 2025-2026 figures are still filling in under publication lag.
- D21H (pulp and paper compositions) sits at only 8.5% of records versus 20.3% for B32B laminates, showing paper-chemistry-first approaches remain the minority route.
Filing growth compares 2021 (555 records) with 2024 (471) — 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 15,815 records in scope (CR5), not by the ranked leaders only.
What this patent landscape covers
This landscape tracks patent activity at the intersection of barrier performance and fibre-based substrates: coatings and laminate structures aimed at oxygen and moisture-vapour transmission, grease resistance, recyclability, coat-weight control, pinhole coverage, heat sealability and food-contact compliance. The scope spans 15,815 records published between 2015 and mid-2026, drawn from filings that name barrier coating, lignin-based barrier coating, grease resistance or moisture barrier in the title, cross-referenced against the technical claim language that defines performance in this space.
The dataset mixes fibre-specific innovation with adjacent coating science pulled in in from lubricants, general surface deposition and even biomedical barrier films, because the same claim language covers all of them. Reading the IPC composition alongside the assignee ranking separates who is filing pure paper-and-pulp chemistry from who is repurposing broader coatings portfolios into food packaging.
Filing trend and technology composition
Two views of the same 15,815-record corpus: how filing volume has moved year on year, and how those records distribute across IPC subclasses. Because a single record can carry several IPC codes, the class shares below add up to more than 100% of records.
Filing trend, 2017-2026
Volume rose from 456 records in 2017 to a peak of 577 in 2022, before easing to 471 by 2024 — a 15% decline over that three-year span. 2025 and 2026 show far lower counts (46 in 2026), but publication typically lags filing by around 18 months, so these final years understate actual filing activity rather than signalling a genuine slowdown.
IPC subclass composition
B32B (layered products and laminates) leads at 20.3% of records, followed by C23C (coating and surface deposition) at 16.8% and B65D (containers and packaging) at 13.3%. Paper-specific chemistry under D21H accounts for 8.5% of records — smaller than the laminate and general-coating classes, which suggests much of the claim activity treats the fibre substrate as one layer in a broader laminate strategy rather than the primary chemistry target.
Shares are the percentage of the 15,815 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Barrier Coatings for Fibre-Based Packaging with Eureka
This page is one run against one query. Ask Eureka your own question about barrier coatings for fibre-based packaging and every answer comes back with the patent numbers behind it.
Try EurekaA representative recent filing
WO2025262366A1 — Heat sealable packaging material
The claims describe a heat-sealable paper packaging built from a base paper, a first precoating layer, a barrier-supporting coating layer with a coat weight of 2 to 15 g/m2, and a barrier coating layer with a coat weight of 3 to 12 g/m2 containing at least 40 wt.% heat-sealable polymer. The filing also covers the manufacturing method, the resulting package, and use of the material in flexible packaging formats.Filed by UPM-Kymmene Corporation, published 2025-12-26.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6482994B2 | Ether-capped poly(oxyalkylated) alcohol surfactants | 804 |
| 2 | WO2001042408A2 | Ether-capped poly(oxyalkylated) alcohol surfactants | 750 |
| 3 | US5911937A | Desiccant entrained polymer | 748 |
| 4 | US5067491A | Barrier coating on blood contacting devices | 637 |
| 5 | US4312575A | Soft corneal contact lens with tightly cross-linked polymer coating and method of making same | 626 |
| 6 | US5407713A | Multilayered barrier structures | 587 |
| 7 | US20090324989A1 | Multilayer thermal barrier coating | 443 |
| 8 | US5411876A | Use of grease or wax in the polymerase chain reaction | 441 |
| 9 | US6214422B1 | Method of forming a hybrid polymer film | 439 |
| 10 | US6231939B1 | Acrylate composite barrier coating | 426 |
Citation counts reflect an older, highly-cited cohort inside this corpus and should be read as a signal of influence within the searched literature, not as a marker of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns stand out once volume, concentration and class composition are read together.
No single assignee dominates the field
The leader holds 973 records, but the top five combined account for only 13.7% of all records in scope, and the top ten for 19.0%. That leaves a long tail of the remaining ranked assignees and unranked filers holding the majority of the corpus — a structure closer to a fragmented, still-forming field than a settled duopoly.
Volume has cooled from its 2022 peak, not collapsed
Filings rose to a peak of 577 in 2022 and eased to 471 by 2024, a 15% decline over that window. That is a cooling from peak activity, not a field in retreat — the drop is measured against an unusually strong 2021-2022 run, and 2025-2026 counts are still incomplete under normal publication lag.
Laminate-structure claims outweigh pure fibre chemistry
B32B layered-product claims cover 20.3% of records while D21H pulp-and-paper composition claims cover only 8.5%. Most patent activity treats the barrier problem as a multi-layer laminate design question rather than a paper-furnish chemistry question, which matters for anyone deciding whether to file on the coating stack or the substrate itself.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to barrier coatings for fibre-based packaging, with the prior art for and against each one.
Who is filing, and where activity has stalled
The ranked leaders span a wider set of industries than fibre packaging alone — several names carry legacy portfolios in lubricants, aerospace coatings and industrial surface treatment that overlap this search on shared claim language.
A single leader well ahead of the field
The top-ranked assignee holds 973 records, roughly four times the fifth-place count of 236 — a gap that marks it as the clear reference portfolio to check before filing new claims, even though it does not translate into field-wide dominance.
Several long-standing filers have gone quiet
A number of assignees with substantial historical portfolios show zero filings in the latest year, several down -100% year on year from prior activity. That does not mean the underlying claim space is exhausted; it more likely reflects portfolios built years ago that are no longer being actively extended.
Collaboration is limited and concentrated
Only ten co-assignee pairs appear across the corpus, and the strongest of these are tied to a small number of corporate-affiliate relationships rather than broad cross-industry partnerships. Joint filing is not yet a common strategy in this field.
| Assignee | Recent year | YoY |
|---|---|---|
| Raytheon Technologies Corporation | 3 | -63% |
| General Electric Company | 0 | -100% |
| United Technologies Corporation | 0 | — |
| Procter & Gamble Co | 0 | -100% |
| The Lubrizol Corporation | 0 | -100% |
| Honeywell International Inc | 0 | -100% |
| Mobil Oil Corporation | 0 | — |
| Dow Global Technologies LLC | 0 | — |
Where to take this analysis
The dataset points to a field with a clear reference leader but no settled consolidation, and with claim density concentrated in laminate structure rather than paper chemistry itself.
Map the ranked leader's active claims
Before drafting new coating-stack claims, check the leading assignee's granted family against the coat-weight and heat-sealability language used in recent filings like WO2025262366A1.
Explore assignee portfolios in EurekaProbe the under-claimed branches
Lignin-derived dispersions and repulpable heat-seal chemistry show thinner density than the core laminate classes — worth a freedom-to-operate check before committing R&D spend.
Run a white-space search in EurekaCommon questions about this landscape
One assignee leads the ranked list with 973 records, well ahead of the fifth-place holder at 236. That said, the top five assignees combined account for only 13.7% of all 15,815 records in scope, and the top ten for 19.0%, so the field is far from consolidated. A long tail of smaller filers, including several with legacy portfolios in lubricants and industrial coatings, holds the majority of the remaining activity.
Filing volume rose from 456 records in 2017 to a peak of 577 in 2022, then eased to 471 by 2024 — a 15% decline over that three-year window. Figures for 2025 and 2026 look much lower, but publication typically lags filing by around 18 months, so those final years are still incomplete rather than evidence of a genuine drop-off. Treat 2024 as the most recent year with a reliable count.
Laminate-based approaches, covered largely under IPC class B32B, treat the barrier as a multi-layer structure applied to a fibre substrate and account for 20.3% of records in this landscape. Paper-chemistry approaches under D21H modify the pulp or coating furnish itself and cover a smaller 8.5% of records. The imbalance suggests most current patent activity is solving the barrier problem at the coating-stack level rather than reformulating the base substrate.
Relative to the dominant laminate and general coating classes, sub-areas like lignin-derived barrier dispersions, repulpable heat-seal chemistry, and process controls for coat weight and pinhole coverage show thinner claim density. These are technically specific niches rather than broad open fields, so a freedom-to-operate search focused on the exact chemistry and measurement method is still advisable before filing. Under-claimed does not mean unclaimed.
Not necessarily. The most-cited records in this corpus, such as US6482994B2 and US5911937A, are older filings that have simply had more time to accumulate citations within the searched literature. High citation counts are a better signal of historical influence on subsequent filings than of current commercial relevance, especially in a field where recent volume has shifted toward laminate and heat-seal claims.
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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.