Thermoplastic Composite Environmental Durability Patent Landscape 2026
- Small, concentrated field. only 15 patent families sit inside this search, with filings already tailing off from a 2017 peak of three.
- Two documents anchor most citation weight. US4983247A (63 citations) and its EP counterpart EP0412346A2 (20 citations) still dominate the resin-rich surface layer approach decades on.
- Filing offices skew European. EPO carries seven of the filings against five for the US, two PCT and one from China — durability testing claims are being anchored in Europe first.
A narrow claim space around aging and surface durability
Thermoplastic composite environmental durability sits at the intersection of matrix chemistry and accelerated-aging test methodology, covered here by IPC classes spanning B29C shaping, B32B layered products and C08J polymer processing. The dataset is small — 15 families — and the filing trend has already turned down from its 2017 peak of three filings a year, with the most recent year showing none recorded yet under the usual 18-month publication lag. That lag means the true 2025–2026 filing level is understated, not absent.
Two related documents from the same family lineage — a US grant and its European counterpart on resin-rich surface layers — carry the bulk of citation weight, which signals that the surface-layer route to weathering resistance was the reference point other filers built from, not that it remains the most active area today.
Filing trend and technology composition
Two views of the same 15-family dataset: how filing activity has moved year on year, and which IPC subclasses carry the claim volume.
Filing trend, 2017-2026
Filings peaked in 2017 at three and returned to that same level at the 2022 midpoint before falling away toward the uncounted final years — a flat-to-declining pattern rather than sustained growth.
IPC subclass composition
B29C shaping of plastics dominates at 14 of 15 records, with B32B layered products (9) and C08J polymer processing (8) as the next densest classes; D02G yarn texturing and B29K materials indices appear only in the smaller tail.
Shares are the percentage of the 15 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Thermoplastic Composite Environmental Durability with Eureka
This page is one run against one query. Ask Eureka your own question about thermoplastic composite environmental durability and every answer comes back with the patent numbers behind it.
Try EurekaThe documents setting the reference points
WO2020247549A1 — Thermoplastic GEL coat
The present invention relates to a liquid, thermoplastic acrylic gel cap composition that can impart UV resistance, higher impact, and aesthetic effects to a composite material. Additionally, the post processing of the material when combined with a thermoplastic composite can allow for thermoformability, weldability and recyclability, unlike seen with traditional thermoset based gel coats.Filed by Arkema Inc., published 2020-12-10.
View full record →| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4983247A | Method for producing resin rich surface layer on composite thermoplastic material | 63 |
| 2 | EP0412346A2 | Method for producing resin rich surface layer on composite thermoplastic material | 20 |
| 3 | WO2020247549A1 | Thermoplastic GEL coat | 11 |
| 4 | CN115541480A | 一种聚芳醚酮树脂基热塑性复合材料的寿命预测方法 | 7 |
| 5 | US20200031071A1 | Thermoplastic composite | 2 |
| 6 | WO2024074662A1 | Spar cap and method of production thereof | 1 |
| 7 | US11529781B2 | Thermoplastic composite | 1 |
| 8 | EP0412346B1 | Method for producing resin rich surface layer on composite thermoplastic material | 1 |
Citation counts favour older filings inside any fixed corpus; read them as markers of influence on later claim drafting, not as a guide to current filing activity.
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. Publication numbers are shown where the record carries one (8 of 8 rows); clicking a row searches Eureka by that number.
Put your own technology through the same analysis
Eureka on the web
When you want the answer in the next five minutes.
The agent works the prompt against patents and technical literature, citing every source.
Run your analysis now →MCP server & REST API
When it has to run inside your own pipeline.
Patent search, landscape analysis and assignee resolution as MCP tools. Drop them into any agent framework, or call REST directly.
Browse MCP servers →What the numbers actually mean for a filing decision
Read together, the trend, the IPC spread and the citation table point to a field where the surface-treatment approach to UV and moisture resistance was staked out early and has not been substantially reopened since.
Activity has not sustained past its first peak
Filings hit three in 2017, matched that again at the 2022 midpoint, then fell toward zero in the most recent recorded year. Given the usual 18-month publication lag, the true current level is higher than shown, but the shape is flat-to-declining rather than a growth curve.
Europe leads office of first filing
Seven of the 15 families were filed at the EPO against five in the US, with two PCT filings and a single Chinese filing. For a field defined by test-method and materials claims, that split suggests European examiners have seen the bulk of prosecution history here.
One lineage still anchors the art
US4983247A and its EP sibling EP0412346A2, both on resin-rich surface layers for thermoplastic composites, carry far more citations than anything filed since. New filings in surface-treatment durability are still likely to be measured against this pair.
Claim volume sits in process, not chemistry
B29C shaping of plastics touches nearly every record, ahead of B32B layered products and C08J polymer processing. The smaller D02G and B29K classes appear only a handful of times, marking them as thinner claim territory rather than dead ends.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to thermoplastic composite environmental durability, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Arkema Inc. | GLIMA INNOVATION LTDA | 3 |
The only co-assignee pair on record is Arkema Inc. with GLIMA INNOVATION LTDA, appearing together three times; beyond that pairing there is no meaningful joint-filing network to map.
Who holds the claims — and who has gone quiet
Every tracked assignee shows zero filings in the latest year, consistent with the dataset's overall decline; the ranking below reflects historical filing weight rather than current momentum.
A short assignee list, no runaway leader
With only 15 families across the whole dataset, no single assignee has built a dominant position; activity is spread across a handful of corporate names with one recurring co-filing pair.
One real collaboration pair
The Arkema entity and GLIMA INNOVATION LTDA are the only assignees that file together with any regularity, doing so three times. No other co-assignee relationship appears in the dataset.
Everyone's recent-year count reads zero
General Electric Company, Arkema Inc., Baker Hughes Energy Technology UK Limited, GLIMA INNOVATION LTDA, General Electric Oil & Gas UK Limited and Arkema France all show zero filings in the latest tracked year — consistent with the broader publication lag rather than a sign the field is abandoned.
| Assignee | Recent year | YoY |
|---|---|---|
| General Electric Company | 0 | — |
| Arkema Inc. | 0 | — |
| Baker Hughes Energy Technology UK Limited | 0 | — |
| GLIMA INNOVATION LTDA | 0 | — |
| General Electric Oil & Gas UK Limited | 0 | — |
| Arkema France | 0 | — |
| Aerospace Research Institute of Materials & Processing Technology | 0 | — |
Where to take this analysis
The dataset is small enough to read in full, but that also means a single new filing can shift the balance. These are the follow-up angles worth running before committing a filing strategy.
Check the resin-rich surface layer lineage for expiry
US4983247A and EP0412346A2 anchor the field's citation graph; confirming their current legal status clarifies whether the core surface-treatment approach is now open.
Explore in Eureka →Model the D02G and B29K overlaps
Yarn texturing and moulding-material indices show thinner filing density than the B29C core — worth a deeper claim-scope pull before assuming the space is clear.
Run a claim comparison →Track the Arkema / GLIMA co-filing pattern
The one recurring co-assignee relationship in this dataset may indicate a supply or licensing arrangement worth watching for follow-on filings.
Monitor this assignee pair →Common questions on this landscape
This dataset contains 15 patent families published between 2015 and 2026 under the searched IPC classes and keyword scope. That is a genuinely small field compared to most composite-materials landscapes, which means individual filings carry more relative weight in shaping the prior art. Because publication lags filing by roughly 18 months, the most recent one to two years will always look thinner than they eventually turn out to be. Treat the 15-family count as a floor, not a ceiling, on true filing activity.
Fourteen of the 15 records in this dataset carry a B29C classification, which covers shaping of plastics rather than polymer chemistry per se. That happens because most durability claims here are framed around a process or surface treatment — such as a resin-rich surface layer or a gel-coat application step — rather than a novel base polymer. B32B (layered products) and C08J (polymer processing) pick up the secondary chemistry and lamination angles. A filer targeting pure additive chemistry would sit more in C08K, which appears only five times.
Arkema-related entities (Arkema Inc. and Arkema France) appear in the dataset, including the only recurring co-assignee pairing with GLIMA INNOVATION LTDA, and Arkema Inc. also holds the featured WO2020247549A1 gel-coat filing. However, with only 15 families total and no assignee showing filings in the latest tracked year, no single company holds a commanding lead. The field is better described as fragmented than as led by one player.
WO2020247549A1, filed by Arkema Inc. and published in December 2020, describes a liquid thermoplastic acrylic gel-coat composition intended to give a composite material UV resistance, higher impact strength and aesthetic surface quality. Its distinguishing claim is compatibility with thermoplastic composite substrates in a way that preserves thermoformability, weldability and recyclability — properties traditional thermoset gel coats do not offer. For anyone formulating a recyclable or reprocessable composite surface treatment, this filing is a direct reference point to design around or license.
The IPC composition points to D02G (yarn texturing, 5 records) and B29K (moulding-material indices, 4 records) as the thinnest classes relative to the dominant B29C/B32B core. Combined with the almost complete absence of hydrothermal-specific test-protocol claims and life-prediction modelling approaches (aside from one Chinese filing on polyaryletherketone life prediction), these look like the sub-areas with the most room for a new independent claim. A freedom-to-operate search focused on these overlaps, rather than on the crowded surface-layer core, is the more efficient use of review time.
Research Thermoplastic Composite Environmental Durability in depth with Eureka
Go past this page: query the whole thermoplastic composite environmental durability corpus yourself, in your own scope.
Every answer comes back with patent numbers you can open.
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.