Wood Plastic Composites Patents: Top Companies & Trends 2026
- 28.7% concentration at the top. The five leading assignees account for 232 of 809 records in scope — a dense core with a long tail below it.
- Filing has cooled from its 2020 peak. Activity peaked at 82 records in 2020 and fell -61% from 2021 (44) to 2024 (17), the last complete filing year.
- Coupling and additive chemistry dominates the claim space. C08L polymer compositions appear in 37.8% of the 809 records, with B32B laminates close behind at 29.0%.
Filing growth compares 2021 (44 records) with 2024 (17) — 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 809 records in scope (CR5), not by the ranked leaders only.
What the wood plastic composite patent record actually covers
Wood plastic composites sit at the intersection of polymer formulation and building-products engineering: fibre loading, coupling agents, extrusion processing and weathering resistance are the recurring technical levers across the 809 records in scope. The search string captures both the chemistry side — coupling agents, recycled polymer content, water absorption performance — and the processing side, principally extrusion. Filing spans 2015 through the 2026 cut-off, with the bulk of activity concentrated in the years around 2020.
Because publication lags filing by roughly 18 months, the last one to two years in any trend chart will look thinner than the underlying filing activity actually was. Treat 2024 as the most recent year with a complete picture, and read 2025-2026 figures as still filling in.
Filing trend and technology composition
Two views of the same 809 records: how filing volume has moved year over year, and how the claim space splits across IPC subclasses.
Filing trend, 2017-2026
Filing rose to a peak of 82 records in 2020, then declined -61% from 44 records in 2021 to 17 in 2024 — the last year that can be treated as complete given the ~18-month publication lag.
Technology composition by IPC subclass
C08L (polymer compositions) leads at 37.8% of the 809 records, followed by B32B (layered products & laminates) at 29.0% and B29C (shaping of plastics) at 23.2%. Because records can carry multiple IPC classes, these shares sum to well over 100%.
Shares are the percentage of the 809 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Wood Plastic Composites with Eureka
This page is one run against one query. Ask Eureka your own question about wood plastic composites and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
US20200385560A1 — Wood Plastic Composite Composition Comprising a Wax Composition
Filed by Sasol Germany, this 2020 filing claims wood plastic composite compositions built around a wax composition, targeting improved processing behaviour. The wax is defined by dynamic viscosity at 120°C, congealing point, the proportion of linear-chain molecules and the content of oxidized hydrocarbons — a narrow, physically-measurable set of parameters rather than a broad compositional claim.Abstract shown as published.
View full record| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20100015420A1 | Biolaminate composite assembly and related methods | 125 |
| 2 | US20120015176A1 | Biolaminate composite assembly and related method | 108 |
| 3 | US20110262720A1 | Cellulosic biolaminate composite assembly and related methods | 103 |
| 4 | WO2012001109A1 | A panel comprising a polymeric composite layer and a method of manufacturing such panel | 100 |
| 5 | CN101767362A | 一种长效防霉木塑复合材料及其制备方法 | 91 |
| 6 | CN101921491A | 一种木塑复合材料 | 87 |
| 7 | US20060006564A1 | Process for making modified cellulosic filler from recycled plastic waste and forming wood substitute articles | 84 |
| 8 | US20070141316A1 | Tri-extruded WUCS glass fiber reinforced plastic composite articles and methods for making such articles | 73 |
| 9 | WO2012001091A1 | A panel comprising a polymeric composite layer and a reinforcement layer | 72 |
| 10 | US20050101700A1 | Biopolymer and methods of making it | 71 |
Citation counts reflect influence within the searched corpus and skew toward older filings; they are not a measure of current commercial importance.
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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Browse MCP servers →What the filing pattern signals
Three read-throughs from the concentration, trend and IPC data that matter for where to file and who to watch.
A dense core, not a monopoly
The five leading assignees hold 232 of the 809 records in scope, and the top ten reach 40.8%. That leaves the majority of the field to a long tail of single- and few-filing entrants — the pattern of a technology with an established core chemistry but plenty of room for narrower process and formulation claims.
Filing has pulled back from its 2020 peak
Volume peaked at 82 records in 2020 and dropped from 44 in 2021 to 17 in 2024, the last complete year. That is a real pullback in new filing, not a sign the field is closed — with an 18-month publication lag, 2025-2026 figures are still incomplete and should not be read as continuing the decline.
Polymer formulation outweighs laminate structure
C08L polymer-composition claims cover 37.8% of the 809 records, ahead of B32B laminate claims at 29.0% and B29C shaping/extrusion claims at 23.2%. New entrants filing on formulation chemistry are competing in the most crowded part of the space; structural and building-finish classes (E04F, E04C) are comparatively lighter.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to wood plastic composites, with the prior art for and against each one.
The assignee landscape
A ranked list of 100 companies makes up the assignee field, led by a filer at 101 records, with fifth place at 25 and tenth place at 16 — a sharp drop-off after the leader that flattens into a long tail.
One filer well ahead of the pack
The leading assignee's count sits far above fifth place (25) and tenth place (16), suggesting a company with a sustained, multi-year filing programme rather than a single burst of activity.
Corporate-family co-filing is common at the top
The strongest co-assignee pairs are affiliated entities filing jointly — a pattern typical of large chemical and materials groups that split R&D and IP holding across subsidiaries rather than independent joint ventures.
Even leading names show little latest-year output
Recent-year momentum among the top-ranked assignees is largely flat or at zero, consistent with the broader post-2021 pullback and with publication lag understating true recent filing.
| Assignee | Recent year | YoY |
|---|---|---|
| I4F Licensing NV | 1 | 0% |
| Dow Silicones Corp | 0 | — |
| UPM-Kymmene Oyj | 0 | — |
| Biovation LLC | 0 | — |
| New Zealand Forest Research Institute Limited | 0 | — |
| Välinge Innovation AB | 0 | -100% |
| Dow Global Technologies LLC | 0 | — |
| University of Maine | 0 | — |
Where to take this next
The dataset points to a formulation-heavy core with room at the structural and building-finish edges. Two practical next steps follow from that.
Map freedom-to-operate against the C08L core
With 37.8% of records carrying a C08L polymer-composition class, any new formulation claim needs a close read of that subset before drafting — not just the top-ranked assignees but the long tail filing narrow variants.
Explore the C08L subset in EurekaWatch for the post-2024 filing picture to fill in
2025-2026 figures are still incomplete due to publication lag. Revisit the trend once another 12-18 months of publications land, rather than concluding the field is winding down from partial-year data.
Track filing trends in EurekaCommon questions on wood plastic composite patents
The assignee ranking in this dataset covers 100 companies, with the leader holding 101 records against 809 total records in scope. The top five combined account for 28.7% of all records, and the top ten reach 40.8%, which means filing is concentrated at the top but far from monopolised — a long tail of smaller filers holds the remaining majority. Company names shift somewhat depending on the exact search scope and date range used, so treat any single ranking as a snapshot rather than a permanent hierarchy.
Filing peaked at 82 records in 2020 and then declined, falling from 44 records in 2021 to 17 in 2024 — a -61% drop over that span, and 2024 is the last year that can be treated as complete. Because patent publication typically lags filing by around 18 months, the 2025 and 2026 figures in any trend chart are still filling in and should not yet be read as continuing that decline. The honest read is a pullback from a 2020 peak, not a verdict on where filing stands today.
Polymer composition claims under IPC class C08L appear in 37.8% of the 809 records in scope, the single largest technology bucket. Layered products and laminates (B32B) follow at 29.0%, and shaping/extrusion processes (B29C) sit at 23.2%. Because a single patent record can carry several IPC classes, these percentages add up to well over 100% and should be read as coverage rates, not a breakdown that sums to a whole.
US20200385560A1, filed by Sasol Germany, claims wood plastic composite compositions built around a specific wax composition, defined by measurable physical parameters — dynamic viscosity at 120°C, congealing point, linear-chain molecule content and oxidized hydrocarbon content. That specificity is a double-edged sword for freedom-to-operate: it blocks wax formulations matching those exact parameter ranges, but it leaves open wax chemistries defined by different physical characteristics, or wood plastic composites using non-wax processing aids entirely. Anyone formulating around this patent should compare their wax's measured parameters directly against the claimed ranges rather than assuming the claim covers wax lubricants generally.
Relative to the dense C08L formulation core, structural building-component claims (E04C, 7.2% of records) and building-finish profile claims (E04F, 15.8%) show noticeably lighter coverage. Fibre-loading optimisation tied specifically to extrusion processing, recycled-polymer feedstock qualification, and weathering/UV stabiliser packages also show comparatively thinner claim density than the core polymer chemistry. These are reasonable areas to scope a freedom-to-operate search before drafting, though thinner coverage is not a guarantee of patentability — it simply means fewer prior filings to design around.
Research Wood Plastic Composites in depth with Eureka
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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.