Paper-Based Packaging Barrier Patents: Leaders & White Space 2026
- Filings peaked in 2022 at 132 and have since declined toward 16 in the partial 2026 year, a flat-to-declining trend rather than a growth curve.
- Pulp and paper composition claims (D21H) dominate appearing in 491 of 823 families, ahead of laminate structures (B32B, 386) and container design (B65D, 357).
- Momentum has scattered rather than consolidated recent-year filing counts from tracked assignees sit at 2 or fewer, with several major names showing 0 filings and -100% year-on-year.
Filing growth compares 2021 (83 records) with 2024 (88) — 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 823 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset tracks patent families combining paper-based, paperboard or fiber-based packaging with barrier functionality — grease resistance, moisture barrier coatings and related treatments applied to fibrous substrates. It spans filings from 2017 through the partial 2026 year, drawing on 823 published records across major receiving offices including the United States, the European Patent Office, the WIPO PCT route, Australia, India and Canada.
The technology composition skews heavily toward pulp and paper chemistry and layered laminate structures rather than pure coating formulation, which signals that most patenting activity treats the substrate and barrier layer as a single engineered system rather than a coating sold independently.
Filing trend and technology mix
Two views of the same 823-family dataset: how filing volume has moved year over year, and which IPC subclasses carry the claim density.
Filings rose to a 2022 peak, then fell back
Annual filings climbed from 32 in 2017 to a peak of 132 in 2022, then declined toward 16 in the partial 2026 year. Because publication typically lags filing by around 18 months, the last one to two years understate true filing activity, but the shape from 2017 to 2022 to the drop after is a genuine plateau-and-retreat pattern, not just a reporting artifact.
Pulp chemistry and laminate structure lead the classification mix
D21H (pulp and paper compositions) appears in 491 records, B32B (layered products) in 386, and B65D (containers and packaging) in 357 — together suggesting most claims are anchored in substrate treatment and multi-layer construction. Coating-process classes (C09D, B29C, B05D, C08L) each sit well below 65 records, meaning the coating formulation and application-method space is comparatively thin relative to the substrate and structure claims built around it.
Shares are the percentage of the 823 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Paper-Based Packaging Barrier Packaging with Eureka
This page is one run against one query. Ask Eureka your own question about paper-based packaging barrier packaging and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited prior art and a representative recent filing
US20220403203A1 — Water Vapor Barrier Coating Composition
A water vapor barrier coating composition for paper-based packaging built from a two-layer aqueous system: a basecoat of ethylenically modified polyvinyl alcohol applied and dried first, followed by a topcoat of aqueous polymeric dispersion compatibilized with a small percentage of the same modified polyvinyl alcohol chemistry.Filed by Mantrose-Haeuser Co., Inc., published 2022-12-22.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | WO2009112255A1 | Packaging laminate, method for manufacturing of the packaging laminate and packaging container produced there… | 132 |
| 2 | WO2011003565A2 | Non-foil packaging laminate, method for manufacturing of the packaging laminate and packaging container there… | 116 |
| 3 | US5716473A | Method of making a semi-rigid cereal carton | 90 |
| 4 | US5231268A | Printed microwave susceptor | 89 |
| 5 | US5437406A | Semi-rigid cereal carton | 83 |
| 6 | US20030220036A1 | Laminates and coated materials comprising hydroxy-phenoxyether polymers | 80 |
| 7 | US4914266A | Press applied susceptor for controlled microwave heating | 77 |
| 8 | US20040033379A1 | Low permeability materials and coatings | 70 |
| 9 | US5985772A | Packaging system comprising cellulosic web with a permeant barrier or contaminant trap | 70 |
| 10 | US20220112663A1 | Biodegradable and recyclable barrier paper laminate | 62 |
Citation counts reflect influence within this searched corpus and favour older filings; they are not a measure 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 numbers say about the field's shape
Three signals stand out once filing volume, classification mix and citation data are read together.
Growth has already crested
Filings peaked in 2022 at 132 and have fallen sharply since, including the partial 2026 count of 16. Even allowing for publication lag, the multi-year decline from the 2022 peak marks this as a maturing rather than emerging filing wave.
Substrate chemistry outweighs coating formulation
D21H pulp and paper composition claims appear in the majority of records, well ahead of dedicated coating classes like C09D (63) or B05D (58). Most inventive effort is going into the fiber substrate itself, not into standalone barrier coating chemistry.
Foundational laminate patents still anchor the field
The most-cited records are laminate and carton-construction patents from well before this dataset's filing window, including two packaging-laminate families and older cereal-carton and susceptor patents. New filers are building on, and around, structural claims set well over a decade ago.
No single assignee is pulling ahead
Recent-year filing counts for tracked assignees top out at 2, with several major names — including large multinational packaging and consumer-goods groups — showing 0 filings and -100% year-on-year. Activity has dispersed rather than consolidated around a leader.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to paper-based packaging barrier packaging, with the prior art for and against each one.
Who is filing, and where the claim space is still open
Co-assignee pairings show consolidated corporate filing behaviour among a small number of groups, while recent-year momentum is thin across the board.
Filing consolidation sits inside a few corporate families
The strongest co-assignee pairing links two Unilever intellectual-property entities at 12 shared families, followed by a Tetra Laval-linked pairing at 8. This points to internal IP-holding structures rather than cross-company joint filing.
Established filers have gone quiet
Tetra Laval-linked and WestRock-linked entities both show 0 filings in the latest year against a -100% year-on-year change, while Procter & Gamble and ProAmpac Holdings each hold steady at 2. No tracked assignee is scaling up filing volume right now.
Filing is spread across major offices, not concentrated in one
The United States leads with 159 filings, closely followed by the EPO at 150 and WIPO PCT at 110, with Australia, India and Canada each above 49. This is a globally-filed technology area rather than one anchored to a single jurisdiction.
| Assignee | Recent year | YoY |
|---|---|---|
| The Procter & Gamble Company | 2 | — |
| ProAmpac Holdings, Inc. | 2 | 0% |
| Tetra Laval Holdings & Finance S.A. (Switzerland) | 0 | -100% |
| Societe des Produits Nestle S.A. (Switzerland) | 0 | — |
| WestVaco Corporation | 0 | — |
| WestRock MWV, LLC | 0 | -100% |
| Stora Enso Oyj | 0 | -100% |
| Footprint International, LLC | 0 | -100% |
Where to take this analysis
The filing and classification data point to specific next steps depending on whether you are scoping freedom-to-operate or looking for open claim territory.
Map the coating-process white space
C09D, B29C and B05D classes each carry under 65 records against 491 in pulp chemistry alone — a first-pass signal that coating application methods are comparatively under-claimed relative to substrate treatment.
Explore coating-process claims in EurekaCheck freedom-to-operate against foundational laminate patents
The highest-cited records in this corpus are laminate and carton-construction patents predating most current filings; any new barrier-coating product built on a laminate structure should be checked against these first.
Run a citation check in EurekaWatch for renewed filing activity
With filings down from a 2022 peak and most assignees at 0-2 recent filings, a shift back upward from any single filer would be an early signal worth monitoring given the publication lag on the latest years.
Set up filing alerts in EurekaCommon questions about paper-based barrier packaging patents
No single assignee dominates the current filing picture. Co-assignee data shows the strongest links between Unilever's own IP-holding entities and between Tetra Laval-linked entities, which reflects internal corporate structuring more than a market leader emerging. Recent-year filing counts for every tracked assignee sit at 2 or fewer, so leadership by volume has shifted over the dataset's timeframe rather than staying fixed with one company.
No. Filings rose from 32 in 2017 to a peak of 132 in 2022, then declined toward 16 in the partial 2026 year. Publication lag of roughly 18 months means the last one to two years are understated, but the multi-year drop after 2022 is a genuine plateau rather than a reporting gap. This pattern is more consistent with a maturing filing wave than an emerging one.
The dataset combines paper, paperboard or fiber-based packaging with barrier functionality such as grease resistance and moisture barrier coatings. Classification data shows the heaviest concentration in pulp and paper composition claims (D21H, 491 records) and layered laminate structures (B32B, 386), with container and packaging design (B65D, 357) close behind. Dedicated coating-process and coating-chemistry classes carry far fewer records, each under 65, indicating lighter claim density in coating formulation and application methods specifically.
US20220403203A1, assigned to Mantrose-Haeuser Co., Inc. and published 2022-12-22, claims a two-layer aqueous water-vapor barrier coating system for paper-based packaging: a basecoat of ethylenically modified polyvinyl alcohol applied and dried first, then a topcoat of aqueous polymeric dispersion compatibilized with the same base chemistry. It is relevant to anyone developing sequential aqueous basecoat/topcoat systems on fibrous substrates using modified PVOH as the compatibilizing agent. Companies working with different barrier chemistries, such as bio-based coatings outside the modified-PVOH family, sit outside its direct claim scope.
The classification data points to coating-process and coating-chemistry classes as comparatively under-claimed relative to substrate and structural claims: C09D, B29C, B05D and C08L each hold under 65 records against 491 in pulp chemistry alone. Specific under-claimed branches include repulpable barrier layer adhesion, bio-based grease-resistant coating chemistries, and recyclable multi-layer delamination methods. These are areas where filing density is lighter, not necessarily areas without any prior art, so a freedom-to-operate check remains necessary before filing.
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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.