Seed Treatment Materials Patents: Leaders, Trends & White Space 2026
- Filing has cooled, not grown. activity peaked in 2021 at 16 families and has since drifted back toward 2017 levels, with 2026 still partial.
- Coatings sit inside a biocide-heavy field. A01N biocide classifications appear on 160 of 297 families versus just 11 tagged directly under C09D coatings — the material science is filed as an agrochemical add-on, not a standalone coatings art.
- Filing is split across six offices with no single gateway. China, the US, PCT, Canada, Europe and India each hold between 28 and 54 records, so freedom-to-operate work cannot be cleared in one jurisdiction alone.
Filing growth compares 2021 (16 records) with 2024 (15) — 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 297 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset tracks 297 patent families filed against seed treatment materials — biological seed coatings, controlled-release seed films and polymer seed coats — captured through claims and abstracts referencing coating material composition and cross-classified under planting, agrochemical and coatings IPC codes. The window runs from 2015 through a partial 2026, giving a decade-plus view of how coating chemistry has been claimed around the seed itself rather than the active ingredient it carries.
Because publication lags filing by roughly eighteen months, the last one to two years in any trend line will always look thinner than they eventually turn out to be. The pattern that follows should be read with that lag in mind, particularly for 2025 and 2026.
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Filing trend and technology composition
Two figures anchor this landscape: how filing volume has moved year over year, and which IPC subclasses carry the claim weight.
A decade of flat-to-declining filing
Annual filings ran from 13 in 2017 to a peak of 16 in 2021, before easing back toward 5 by 2026 (a partial year). The 2022 midpoint of 12 sits below the peak, confirming the field is not in a growth phase — it is mature enough that most obvious coating formulations have already been claimed.
Coatings are claimed inside agrochemical, not materials, classifications
A01C (planting and sowing) covers 229 of 297 families and A01N (biocides) covers 160, while C09D (coatings, paints and inks) accounts for only 11. The coating material itself is rarely the sole subject of a claim; it is almost always claimed as a delivery vehicle for an agrochemical or biological payload, which is where a materials-first filer can differentiate.
Shares are the percentage of the 297 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Seed Treatment Technology Advanced Materials with Eureka
This page is one run against one query. Ask Eureka your own question about seed treatment technology advanced materials and every answer comes back with the patent numbers behind it.
Try EurekaFoundational and recent filings
EP4732670A1 — Seed coating material and coated seed (Kuraray)
The application claims a biodegradable seed coating material built on a vinyl alcohol polymer, optionally combined with sodium acetate, where the combined methanol-soluble content of the polymer and sodium acetate falls between 2% and 20% by mass. The stated aims are biodegradability, low dust generation, and improved coatability onto seeds.Filed by Kuraray, published 2026-04-29 — the compositional ratio is the operative claim element.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4245432A | Seed coatings | 1,504 |
| 2 | US4383391A | Seed coating composition based on carbamate pesticide and non-alkaline amorphous carbon | 177 |
| 3 | US6199318B1 | Aqueous emulsions of crystalline polymers for coating seeds | 134 |
| 4 | US20040077498A1 | Agricultural seed having protective coatings | 107 |
| 5 | US4251952A | Plant seed coating | 96 |
| 6 | WO2009021986A1 | Seed treatment compositions and methods | 73 |
| 7 | WO2007128756A1 | Use of arylcarboxylic acid biphenylamides for seed treatment | 70 |
| 8 | US20100267554A1 | Seed coating compositions and methods for applying soil surfactants to water-repellent soil | 68 |
| 9 | US6148748A | In-line seed treating unit for air seeders | 63 |
| 10 | US5567238A | Oscillating bed seed coating machine for particulate material | 51 |
Citation counts accumulate over time and favour older filings; treat them as a measure of influence on later art, not of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers say
Three patterns stand out once filing volume, IPC composition and citation depth are read together.
Volume has already crested
Filings rose from 13 in 2017 to a peak of 16 in 2021, then fell back through a midpoint of 12 in 2022 toward 5 in 2026. Even allowing for publication lag, the trajectory is a decline from peak rather than a plateau.
Materials claims ride inside agronomy filings
Only 11 of 297 families sit under the coatings-specific C09D subclass, while 229 sit under A01C (planting and sowing) and 160 under A01N (biocides). Most coating innovation is filed as part of a planting or crop-protection application rather than as a standalone materials patent.
No single office dominates
Receiving-office counts sit within a narrow band across China, the United States, PCT, Canada, Europe and India. Six offices each hold at least 28 records, so a single-jurisdiction novelty or freedom-to-operate search will miss a meaningful share of the art.
Foundational art is decades old
The most-cited record in this dataset dates to the era of basic seed coating compositions and carries citation counts an order of magnitude above later filings. That gap reflects age and corpus exposure more than present-day relevance.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to seed treatment technology advanced materials, with the prior art for and against each one.
Assignees and where activity has gone quiet
The assignee set includes agrochemical majors, seed enhancement specialists and university labs, but recent-year momentum has cooled across the most active names rather than concentrating further.
Leading filers have gone quiet at once
Every one of the assignees with the strongest historical filing record — including the largest agrochemical and seed-genetics names in the dataset — shows zero filings in the latest tracked year, with one recording a full year-over-year drop. That is unusual for a field this size and points to a pause in claim-building rather than continued expansion by incumbents.
Collaboration is concentrated in a handful of pairings
Only ten co-assignee pairs appear in the dataset, and the strongest pair — a major agrochemical company and a seed-genetics partner — accounts for 8 joint filings, well ahead of the next pairings at 4 each. Co-filing is the exception, not the norm, in this field.
Coatings specialists are a minority of filers
With only 11 families tagged under the coatings-specific IPC subclass, dedicated materials and coatings companies are a small fraction of the assignee base compared with agrochemical and seed-genetics filers. That leaves room for a coatings-first entrant with strong materials claims to differentiate from the payload-first filings that dominate the set.
| Assignee | Recent year | YoY |
|---|---|---|
| BASF SE | 0 | -100% |
| INCOTEC HLDG | 0 | — |
| Brigham Young University | 0 | — |
| Cereal Products Development Corporation | 0 | — |
| E.I. du Pont de Nemours and Company | 0 | — |
| JFE Steel Corporation | 0 | — |
| Pioneer Hi-Bred International, Inc. | 0 | — |
| Kubota Corporation | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, whitespace filing, or competitive tracking.
Run a claim-level FTO check across all six offices
With filing spread evenly across China, the US, PCT, Canada, Europe and India, a single-jurisdiction search will understate collision risk. A claim chart against the highest-cited prior art is the fastest way to see where a new formulation actually sits.
Explore in Eureka →Test coating-first claim language against the C09D gap
The scarcity of dedicated coatings-subclass filings relative to A01C and A01N volume suggests room for claims that lead with the material rather than the payload it carries.
Explore in Eureka →Watch for renewed filing from paused incumbents
Several of the historically largest filers show zero activity in the latest tracked year. A re-entry by any of them would likely target the same coating chemistries they built citation depth around earlier.
Explore in Eureka →Common questions on seed treatment materials patents
This dataset identifies 297 patent families filed between 2015 and a partial 2026 that reference biological seed coatings, controlled-release seed films or polymer seed coats in their claims or abstracts. Families, rather than raw document counts, are the fairer unit here because they neutralise duplicate filings across jurisdictions and continuation applications. The count spans six major receiving offices, so it reflects global activity rather than a single market.
Filing activity peaked in 2021 at 16 families and has declined since, reaching 5 by 2026, though that final year is still partial due to publication lag. The pattern of a mid-2010s ramp, a 2021 peak and a subsequent decline suggests the field has matured past its highest-growth phase rather than continuing to expand. That does not mean the space is closed — it means new entrants need a differentiated angle rather than a broad formulation claim.
In this dataset, 229 of 297 families sit under A01C (planting and sowing) and 160 under A01N (biocides), while only 11 sit under C09D (coatings, paints and inks). That split happens because most seed coating claims describe the coating as a delivery mechanism for an agrochemical or biological active ingredient, so patent examiners classify the application by its agronomic function rather than its materials science. A filer who wants to claim the coating material on its own merits, independent of payload, is filing into comparatively thin C09D prior art.
China leads with 54 records, followed closely by the United States at 51, then PCT (WIPO) filings at 30, and Canada, Europe and India each around 28. No single office accounts for even a fifth of total filings, so a freedom-to-operate or novelty search limited to one jurisdiction will miss a substantial share of the relevant art. Companies planning to commercialise a coating formulation across multiple markets should budget for clearance work in at least these six offices.
EP4732670A1, published 2026-04-29, claims a biodegradable seed coating material based on a vinyl alcohol polymer, optionally combined with sodium acetate, where the combined methanol-soluble content of those two components falls within a 2% to 20% by mass range. The claim is narrow and compositional — it does not block vinyl alcohol seed coatings generally, only formulations landing inside that specific ratio window. Competing filers working with vinyl alcohol polymers can likely design around it by formulating outside the stated mass-percentage range or by using a different biodegradable base polymer entirely.
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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.