Recycled Materials in Automotive Interiors Patents: Leaders & Trends 2026
- Filing peaked in 2022 at 135 records, then softened — the field is not accelerating, it filed hard mid-cycle and has since cooled, so recent flat years understate true activity given an 18-month publication lag.
- The leader alone holds 70 records while the next four combined bring the top five to just 22.0% of all 1,067 records — concentration at the very top, then a long tail of single- and few-filing entrants.
- B29B plastics-preparation claims dominate at 35.8% of records far ahead of shaping (B29C, 22.4%) and layered-product claims (B32B, 10.8%), showing where the claim space is already dense and where it is thinner.
What this patent set covers
This landscape tracks 1,067 patent families published between 2015 and mid-2026 that combine recycled or closed-loop plastic materials with automotive interior use, filtered against practical adoption barriers named directly in the claims and description: odor, VOC, mechanical property consistency, regulatory recycled content, sorting, traceability, color and appearance limits. It is a narrower and more decision-useful cut than a generic recycled plastic search, because it isolates filings that address why recycled content has historically been hard to specify into an interior part rather than filings about recycling processes in general.
Filing rose through the late 2010s, peaked in 2022, and has since eased off — a pattern consistent with an early wave of process and compounding patents followed by consolidation rather than continued expansion. Receiving-office data shows the United States and China as the two largest filing destinations, with Europe, WIPO/PCT, India and Canada trailing behind, indicating this is a globally contested but US/China-centred field.
Filing trend and technology composition
Two views of the same 1,067-record dataset: how filing volume has moved year over year, and which IPC subclasses carry the claim density.
Filing trend, 2017-2026
Filings rose from 16 in 2017 to a peak of 135 in 2022, then declined toward 9 in the most recent, still-partial year. Because publication typically lags filing by roughly 18 months, the last one to two years will always look thinner than they eventually turn out to be — but the multi-year decline from the 2022 peak predates that lag effect.
Technology composition by IPC subclass
B29B (plastics preparation) leads at 35.8% of the 1,067 records, followed by C08J (polymer processing & solutions) at 23.2% and B29C (shaping of plastics) at 22.4%. Because a single record can carry several IPC codes, these shares add up to well over 100% and should be read as claim density per subclass, not as a partition of the field.
Shares are the percentage of the 1,067 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
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Try EurekaThe most-cited records in this set
Sorting recycled plastics by type before they re-enter the material stream
The present invention relates to a process by which plastics are separated from recycled plastic mixtures according to type, whereby the plastic parts freed from metals are taken on fast moving conveyor belts isolated as a fine, light and/or coarse material and the plastic parts to be selected are removed from the plastic flow in at least one optomechanical sorting device of activatable ejectors. Parts that do not belong to the predominant material group are actively separated out in an initial process step using optomechanical sorting.Filed by Der Grune Punkt-Duales System Deutschland AG, published 2004-03-04.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6427403B1 | Fiber reinforced plastic (FRP) composite structural system for decks, docks, boardwalks, walkways, spa decks,… | 117 |
| 2 | US5560797A | Methods of making floor tile and wall covering from extruded hot recycled vinyl thermoplastic membrane having… | 101 |
| 3 | US20110030557A1 | High efficiency low pressure drop synthetic fiber based air filter made completely from post consumer waste m… | 66 |
| 4 | US7802685B2 | Multistep separation of plastics | 60 |
| 5 | US5881425A | Recycled and recyclable toothbrush having bristle and handle configurations for improved oral hygiene | 60 |
| 6 | US20190366590A1 | Articles of footwear, manufacturing systems, and processes for forming footwear using recycled plastics | 56 |
| 7 | US5850720A | Plastic decking and securement system and method of installation | 55 |
| 8 | US5623803A | Plastic decking and securement system and method of installation | 54 |
| 9 | US20030199596A1 | Recycled plastic material, electronic apparatus having the recycled plastic material method of manufacturing … | 52 |
| 10 | US8398752B2 | High efficiency low pressure drop synthetic fiber based air filter made completely from post consumer waste m… | 49 |
Ranked by citation count within this searched corpus. Older filings accumulate more citations simply by being available longer, so treat this as a signal of influence on the field rather than of current commercial relevance.
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Browse MCP servers →What the data means for filing strategy
Three read-outs from the concentration, composition and momentum figures above, aimed at where to file next and who is actually still active.
A single leader, then a long tail
The leading assignee holds 70 records on its own, well ahead of fifth place at 26. The top five together account for 22.0% of all 1,067 records in scope, and the top ten for 29.6% — meaning the majority of this field sits with entrants who filed only a handful of times each. That is a fragmented claim landscape, not a duopoly.
Historic leaders have gone quiet
Several of the assignees who built the largest historical positions show zero filings in the latest year and year-on-year declines of -100% where a prior-year baseline existed. That does not mean the underlying technology is abandoned — publication lag means the most recent year is always undercounted — but it does mean the loudest historical names are not the ones currently pushing new claims.
Preparation and shaping claims are crowded
B29B (plastics preparation) and B29C (shaping of plastics) together cover well over half the record count when counted with overlap, confirming that upstream processing and part-forming steps are the most heavily claimed part of the workflow. Composition claims (C08L, C08K) and layered-product claims (B32B) sit at noticeably lower density, which is where more specific, defensible filings are still possible.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to recycled materials in automotive interiors, with the prior art for and against each one.
Assignee landscape
The ranked list covers 100 companies; the field is led by one filer with a wide margin, then flattens quickly into single- and few-filing entrants.
One assignee well ahead of the pack
The leading assignee's 70 records sit far above fifth place at 26, making it the only filer with a clearly dominant position. No single company controls the field outright, but this gap is the largest structural feature of the ranking.
A steep drop after the top five
Filing counts fall from 26 at fifth place to 13 at tenth, and the top ten combined still only reach 29.6% of all 1,067 records. That leaves roughly seventy percent of filings spread across entrants outside the ranked top ten.
Co-filing is rare and concentrated
Only ten co-assignee pairs appear in the dataset, and the strongest of them repeat at the same filing count, suggesting a small number of fixed partnerships rather than a broad collaborative network. Most filers in this space patent alone.
| Assignee | Recent year | YoY |
|---|---|---|
| Borealis AG | 0 | -100% |
| LG Chem Ltd. | 0 | -100% |
| MBA Polymers Inc. | 0 | — |
| Plastipak Packaging Inc. | 0 | — |
| Eastman Chemical Company | 0 | — |
| ROLAN INVESTMENT OU | 0 | — |
| Canon Inc. | 0 | -100% |
| Sun Chemical Corporation | 0 | — |
Where to take this analysis
The figures above establish the shape of the field. Turning that into a filing or freedom-to-operate decision means going claim-by-claim in the areas that matter to a specific product line.
Map claim scope in the under-claimed branches
The composition and layered-product classes carry lower filing density than preparation and shaping. Before drafting, check whether that gap reflects true white space or simply narrower search terms.
Explore in Patsnap EurekaTrack the assignees still actively filing
Several historically large filers show zero activity in the most recent year. Confirm which of the ranked leaders are still prosecuting new applications versus maintaining legacy portfolios.
Run an assignee watch in Patsnap EurekaCheck freedom-to-operate against the highest-cited records
The most-cited patents in this set span sorting, fiber composites and separation processes. Any new filing touching those workflows should be checked against this list first.
Screen prior art in Patsnap EurekaFrequently asked questions
One assignee leads the ranked list with 70 records, well ahead of the fifth-place filer at 26. Beyond that leader, the field flattens quickly, with the top ten assignees together accounting for only 29.6% of the 1,067 records in scope. That means most of the field's patent activity sits outside the small set of clearly dominant filers, spread across a long tail of companies that filed only a handful of times each.
No. Filings rose from 16 in 2017 to a peak of 135 in 2022, then declined toward 9 in the most recent, still-partial year. Publication typically lags filing by around 18 months, so the very last year or two will always look artificially low, but the multi-year decline from the 2022 peak is a real signal, not just a reporting artifact. This suggests the initial wave of process and compounding patents has largely been filed, and the field is in a consolidation phase.
Plastics preparation (IPC class B29B) is the densest area, appearing in 35.8% of the 1,067 records, followed by polymer processing and solutions (C08J) at 23.2% and shaping of plastics (B29C) at 22.4%. Composition claims (C08L, C08K) and layered-product claims (B32B) appear less frequently, at 18.7%, 9.1% and 10.8% respectively. Because a record can carry multiple IPC codes, these figures show claim density, not a strict partition of the technology.
The lower-density IPC classes — composition (C08L), additives (C08K) and layered products (B32B) — sit well below preparation and shaping claims in filing volume, which points to narrower and more specific opportunities there. Practically, that maps to areas like odor-neutralizing additive packages, appearance-limit compensation in molded parts, and traceability tagging tied to regulatory recycled-content requirements — none of which show up as heavily claimed in this dataset. Any filing strategy in these areas still needs a claim-by-claim freedom-to-operate check against the specific most-cited patents in the field.
The most-cited record in this set, US6427403B1, covers fiber-reinforced composite structural systems and has been cited 117 times within this corpus, with US5560797A on recycled vinyl membrane flooring close behind at 101 citations. High citation counts inside a searched corpus tend to favor older filings simply because they have had more time to accumulate citations, so these should be read as markers of influence on the field's vocabulary and structure rather than as an exhaustive list of current blocking claims. A proper freedom-to-operate review needs to check active claim scope and jurisdictional status individually, not rely on citation rank alone.
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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.