Paper-Based Packaging Patents: Who Leads as Filings Plateau 2026
- Filings have plateaued, not grown. activity peaked at 108 families in 2021, and 2022's 91 already sits below that high, with no clear recovery since.
- Wet-strength chemistry still dominates the claim space. D21H pulp and paper compositions cover 493 of 643 families, far ahead of container-structure filings under B65D.
- No single assignee is pulling away. recent-year momentum is split across small, mixed moves — a filer up 100% one year can drop to zero the next, signalling a contested, still-open field.
Filing growth compares 2021 (108 records) with 2024 (71) — 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 643 records in scope (CR5), not by the ranked leaders only.
What this dataset covers
This landscape tracks 643 patent families published between 2015 and mid-2026 that combine paper-based, paperboard or fibre-based packaging with an explicit reliability claim — wet strength, burst strength or packaging durability. That search structure means the corpus skews toward material and process claims rather than pure container geometry: D21H pulp and paper compositions alone touches 493 of the 643 families, well ahead of B65D container and packaging claims at 244.
Filing offices split fairly evenly across the United States, Europe and the WIPO PCT route, with Canada, Sweden and Australia forming a secondary tier — consistent with a technology where converting and forestry-heavy jurisdictions file defensively alongside the major consumer markets.
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Filing trend and technology composition
Annual filing counts and IPC subclass distribution for the 643 families in this corpus, based on publication date. Because publication typically lags filing by around 18 months, the last one to two years of the trend line will understate true filing activity.
A peak in 2021, then a plateau
Filings rose from 29 in 2017 to a peak of 108 in 2021, then eased to 91 by 2022 — the midpoint of the trend — before continuing at a lower, roughly flat level. That pattern reads as a technology that reached a first wave of claim staking rather than one still in early growth.
Material chemistry outweighs structure
D21H (pulp and paper compositions) and B32B (layered products and laminates) together outnumber B65D (containers and packaging) and D21J (fibreboard and moulded pulp) combined, showing that most of the claimed innovation sits in what the fibre and coating are made of, not how the container is shaped.
Shares are the percentage of the 643 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 Reliability and Durability with Eureka
This page is one run against one query. Ask Eureka your own question about paper-based packaging reliability and durability and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited prior art and a recent representative filing
US20250196461A1 — Systems and methods for web-fed dry forming of fiber-based products
Disclosed are methods and systems for production of fiber-based, plastic-free products via a web-fed dry forming process. A method of manufacturing a paper-based packaging product includes conditioning a paper web to optimize moisture content and treat it with at least one additive, then dry molding the conditioned web under heat, pressure, or both to produce finished paper-based packaging products.Filed by Footprint International, LLC and published 2025-06-19, this is one of the most recent substantive filings in the corpus.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4471870A | Package for holding a plurality of discrete container assemblies | 149 |
| 2 | US20180362234A1 | Container carrying device | 126 |
| 3 | US20120080156A1 | Cellulose-reinforced high mineral content products and methods of making the same | 104 |
| 4 | US20150191287A1 | Paper-based container carrying device | 84 |
| 5 | US20030220036A1 | Laminates and coated materials comprising hydroxy-phenoxyether polymers | 80 |
| 6 | US20160325899A1 | A container carrying device | 74 |
| 7 | US5985772A | Packaging system comprising cellulosic web with a permeant barrier or contaminant trap | 70 |
| 8 | US6333061B1 | Packaging article | 68 |
| 9 | US20220112663A1 | Biodegradable and recyclable barrier paper laminate | 62 |
| 10 | US9856608B1 | Method for manufacturing fiber-based produced containers | 62 |
Citation counts inside a searched corpus favour older records that have had more time to accumulate citations; treat this table as a map of influential prior art, not of current state of the art.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Three patterns stand out once the raw counts are read against each other: where claim density sits, how citation weight is distributed, and how unstable current leadership is.
Wet-strength chemistry is the most contested ground
Pulp and paper composition claims — additives, fibre treatments and coating chemistries aimed at wet or burst strength — cover the large majority of this corpus. A new filing that targets additive chemistry alone is entering the most crowded part of the field.
Container-level claims are a smaller, secondary layer
B65D filings sit well below D21H, and B32B laminate claims (198) and D21J moulded-pulp claims (93) fall lower still. Structural and forming-process claims are less saturated than the underlying material chemistry.
No assignee has a stable lead
Recent-year filing counts per assignee are small and volatile — a filer moving from one to two families reads as +100%, while another with zero recent filings can still hold prior citation weight. This is a field with contested but shallow leadership, not an entrenched incumbent.
The growth phase has already happened
Activity climbed from 29 families in 2017 to a peak of 108 in 2021, then fell back toward the low 90s and below. High historical filing density means the claim space is occupied, not that room to file is exhausted — the plateau is a filing-strategy signal, not a technology maturity signal.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to paper-based packaging reliability and durability, with the prior art for and against each one.
Who is filing, and where the gate sits
Filing activity is spread across consumer-goods, pulp-and-paper and specialty-chemical assignees, with no single company holding a dominant, growing share in the most recent year. Momentum swings from year to year even among the more active filers, and several previously visible names show no recent-year filings at all.
Consumer-goods filers are still active
Procter & Gamble shows the highest absolute recent-year count among the tracked movers, with growth continuing rather than reversing — consistent with ongoing packaging-durability work tied to consumer product lines.
Specialty fibre materials suppliers are doubling from a low base
Ahlstrom's recent-year count doubled year over year, though off a small absolute base — a pattern typical of specialty-material suppliers testing new wet-strength or coating chemistries rather than defending an existing large portfolio.
Some recently visible names have gone quiet
Footprint International and Kemira both show a drop to zero filings in the latest year after prior activity, alongside International Paper's flat recent-year count — a reminder that citation weight and historical volume do not guarantee continued near-term filing.
| Assignee | Recent year | YoY |
|---|---|---|
| Procter & Gamble | 3 | +50% |
| Ahlstrom | 2 | +100% |
| Stora Enso Oyj | 1 | -50% |
| Footprint International, LLC | 0 | -100% |
| Kemira Oyj (Finland) | 0 | -100% |
| International Paper Company | 0 | — |
| Amcor Flexibles North America, Inc. | 0 | -100% |
| FPInnovations | 0 | — |
Using this landscape
The data points to where claim space is dense and where it is thin, but a filing or freedom-to-operate decision needs the underlying claims read in full.
Check freedom-to-operate against the dense clusters
Any new wet-strength or burst-strength additive claim should be checked against the D21H cluster specifically, since that is where 493 of 643 families sit.
Explore the full assignee rankingTrack the volatile momentum leaders
Year-over-year swings among active filers suggest this field rewards monitoring quarterly rather than annually, particularly around the consumer-goods and specialty-fibre filers named above.
Set up ongoing monitoring in EurekaCommon questions about this landscape
This landscape includes patent families whose title, abstract or claims combine a paper-based, paperboard or fibre-based packaging term with an explicit reliability term such as wet strength, burst strength or packaging durability. That combination biases the corpus toward material and process claims — pulp and paper compositions and laminate structures — rather than pure container-shape design patents. Anyone checking freedom-to-operate should still run their own claim-by-claim search rather than relying on this topic definition alone.
The trend in this corpus rises from 29 families in 2017 to a peak of 108 in 2021, then eases to 91 by 2022 and continues lower. A plateau after a peak usually means the earliest, broadest claims in a technical area have already been filed, pushing later entrants toward narrower, more defensive filings. It does not mean the underlying market or manufacturing activity has slowed — filing behaviour and product activity move on different timelines, and recent years are additionally understated because publication typically lags filing by about 18 months.
No single assignee holds a stable, growing lead in the most recent year in this dataset. Procter & Gamble shows the highest recent-year count among active filers with continued growth, Ahlstrom's smaller count doubled year over year, and several previously active names — including Footprint International and Kemira — show zero filings in the latest year. That volatility suggests leadership in this specific reliability-and-durability niche is still contested rather than settled.
US20250196461A1, filed by Footprint International, describes a web-fed dry forming process that conditions a paper web's moisture content, treats it with an additive, and then dry-molds it under heat or pressure into a plastic-free paper-based packaging product. Companies working on similar dry-forming or moulded-fibre lines should read its specific process steps — moisture conditioning plus additive treatment plus dry molding — closely, since a claim built around that same sequence is the part most likely to create a freedom-to-operate conflict. It does not block wet-forming or conventional pulp-moulding routes that do not use this dry-forming sequence.
The composition-heavy D21H subclass and structural B65D subclass are the most densely filed areas in this corpus, while moulded-pulp barrier coatings, recyclable laminate adhesion systems and web-fed dry-forming equipment show comparatively thinner coverage. That does not guarantee those branches are easy to file into, but it does mean fewer prior families are likely to conflict directly with a well-drafted claim there. Any white-space read should be confirmed against the specific claim language of nearby families before committing to a filing strategy.
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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.