Biodegradable Barrier Coating Patents: Top Companies & Trends 2026
A data-backed view of biodegradable packaging film barrier coating patents: filing trends, IPC composition, leading assignees and the most-cited prior art, drawn from 26 records filed 2015-2026.
Filing growth = 2021 (4 records) → 2024 (2); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 26 records in scope (CR5), not the ranked leaders only.
What this landscape covers
Biodegradable packaging film barrier coating sits at the intersection of polymer science and food-contact packaging: the technical problem is holding oxygen, moisture and gas out of a film while the base material itself breaks down. The 26 records in scope span B65D containers and packaging, B32B layered products, C08J polymer processing and C09D coatings, which is itself a signal — most of the claim activity sits in the substrate and laminate structure, not in coatings-only formulations.
Filing only starts registering meaningfully after 2017, with a partial 2026 that already shows 5 records, and the field remains small enough that a handful of new filings can shift the ranking. Publication lags filing by roughly 18 months, so recent years understate real activity.
Filing trend and technology composition
26 published records make up this dataset, spanning South Korea, India, China, the United States, Europe and Japan as receiving offices.
A small field with a recent uptick, not yet a growth story
Filings moved from 0 in 2017 to a peak of 5 in the partial 2026 year. Between 2021 and 2024 — the last full year available — filings fell from 4 to 2, a -50% move; treat 2025 onward as still filling in rather than reading it as renewed acceleration.
Publication lags filing by roughly 18 months, so 2025 onwards are still filling in. Growth rates on this page therefore end at 2024; running them to the last bar would understate the field.
Structure and processing outweigh coating-specific claims
B32B and C08J each appear in 65.4% of the 26 records, and B65D in 61.5%, showing that most protection sits around the laminate structure and the polymer itself. C09D, the coatings-specific class, appears in only 23.1% of records — a narrower and less crowded slice of the same problem.
Shares are the percentage of the 26 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
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Try EurekaRepresentative filing and most-cited records
KR102338764B1 — Biodegradable gas barrier film and foods package film using the gas barrier film
A gas barrier film is disclosed. The gas barrier film covers a polymer substrate, a cellulose nanofiber layer covering one surface of the polymer substrate and formed of cellulose nanofibers, and a fluorinated polymer coating layer covering one surface of the cellulose nanofiber layer and formed of a fluorine-containing polymer material having hydrophobic properties.Filed by Ulsan University's industry-academic cooperation foundation, dated 2021-12-10 — a three-layer construction combining a cellulose nanofiber barrier with a fluoropolymer top coat.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20050221032A1 | Container of biodegradable heat-resistant hard resin molding | 21 |
| 2 | CN113619242A | 一种可生物降解高阻隔纸塑包装复合膜及其制备方法 | 19 |
| 3 | EP2141191A1 | Composite Package | 18 |
| 4 | KR102148518B1 | Biodegradable barrier film comprising montmorillonite and food packaging manufactured by the same | 12 |
| 5 | US20200216244A1 | Biodegradable packaging, method for manufacturing same and uses thereof | 12 |
| 6 | JP2005111783A | Aluminized biodegradable film | 12 |
| 7 | US20100003457A1 | Composite Package | 7 |
| 8 | KR1020050004892A | Container of biodegradable heat-resistant hard resinmolding | 7 |
| 9 | KR1020210053361A | Moisture barrier biodegradable film, manufacturing method thereof, packaging sheet and sticker comprising the… | 2 |
| 10 | KR102338764B1 | Biodegradable gas barrier film and foods package film using the gas barrier film | 1 |
Citation counts favour older records in a searched corpus; treat them as a signal of influence on later filings, not of current commercial weight.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
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The dataset is small enough that concentration figures and class shares carry more decision weight than they would in a larger field.
The top of the ranking holds only half the field
The top 5 assignees combined account for 13 of the 26 records in scope — half the field — while the leader holds just 4. That is concentration at the top without dominance: no single filer has locked up the space, and the top 10 combined only reach 69.2% of records.
Structure claims outnumber coating-formulation claims
Layered-product claims (B32B) and polymer-processing claims (C08J) each touch 65.4% of records, while the coatings-specific class C09D sits at 23.1%. A filer targeting coating chemistry alone is competing in the smaller, less occupied slice of this landscape.
Filing activity is routed through Asia-Pacific offices
South Korea leads with 7 filings, followed by India at 6 and China and the United States tied at 3. Europe and Japan each show 2. Freedom-to-operate work should weight Korean and Indian prior art first.
Read the recent dip carefully
Filings fell from 4 in 2021 to 2 in 2024, the last year that can be treated as complete. The partial 2026 figure of 5 is not evidence of a rebound — it reflects incomplete publication lag, not a real reversal of the trend.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to biodegradable packaging film barrier coating patent landscape, with the prior art for and against each one.
Where to take this analysis
This landscape is a starting point for freedom-to-operate and whitespace decisions, not a final answer.
Map claim scope against the structure-heavy classes
Since B32B and C08J cover the bulk of records, a new filing needs its independent claims checked against layered-product and polymer-processing prior art, not just coatings art.
Explore claim charts in EurekaTrack the partial 2026 filings as they publish
The current peak year is still filling in. Revisit the trend once 2025 and 2026 filings finish publishing to see whether the 2021-2024 decline actually reversed.
Set up filing alerts in EurekaCheck assignee activity beyond the ranked leaders
With the top 5 holding only half of 26 records, single-filing entrants outside the ranked leaders may hold relevant art that a ranking-only search would miss.
Run an assignee search in EurekaFrequently asked questions
This dataset tracks 26 published records filed between 2015 and the 2026 cut-off, classified under B65D, B65B, B32B and C09D. That is a small, specialised field rather than a mature one, and the 2026 figure is still partial because publication lags filing by roughly 18 months. Treat the total as a floor, not a ceiling, since more 2025-2026 filings will still surface.
The ranking covers 22 companies, with the leader holding 4 of the 26 records and the field spreading out quickly after that — fifth place holds 2 and tenth place holds 1. The top 5 assignees combined account for 50.0% of all records, and the top 10 reach 69.2%. That is concentration without a single dominant player, so a competitive scan needs to look past the top few names.
Layered-product claims (B32B) and polymer-processing claims (C08J) each appear in 65.4% of the 26 records, with container and packaging claims (B65D) in 61.5% and polymer-composition claims (C08L) in 53.8%. Coatings-specific claims under C09D appear in only 23.1% of records. Most protection in this field sits around the film's layered structure and the polymer itself, not around coating formulation alone.
Filings rose from 0 in 2017 to a peak of 5 in the still-partial 2026 year, but the last full comparison available runs from 4 filings in 2021 down to 2 in 2024 — a -50% move. Because publication lags filing by about 18 months, the apparent 2025-2026 pickup should not be read as a rebound yet. The honest read is a small field with a recent dip that has not yet been confirmed either way.
The most-cited record in this dataset is US20050221032A1, covering a biodegradable heat-resistant hard resin molding container, cited 21 times, followed by CN113619242A on a biodegradable high-barrier paper-plastic composite film at 19 citations. EP2141191A1 on composite packaging and two more recent records, KR102148518B1 and US20200216244A1, round out the most-cited group. Citation counts in a searched corpus tend to favour older filings, so treat these as markers of influence on later work rather than current commercial relevance.
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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.