Antimicrobial Textile Fiber Patents: Leaders & White Space 2026
- Filing has cooled since 2019. The peak year was 2019 at 79 filings; by 2026 (partial) annual filings sit at 3, with the 2022 midpoint at 46 already showing decline, not growth.
- Chemical treatment dominates over device claims. D06M textile chemical treatment (543 records) and A01N biocides (432) outweigh A61L sterilising claims (214) by a wide margin, showing where the claim density actually sits.
- Japan and the US lead filing venues, not China. Japan (352) and the United States (269) receive more filings than EPO (186), WIPO/PCT (122), India (88) or Canada (51), despite several leading assignees carrying Chinese-script names in the record.
Filing growth compares 2021 (60 records) with 2024 (35) — 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 1,411 records in scope (CR5), not by the ranked leaders only.
A mature, narrowing field built on chemical fiber treatment
Antimicrobial textile functional fiber technology covers the chemical and physical routes for making fabric resist microbial growth: silver-loaded and metal-salt fibers, quaternary ammonium and biocide treatments, and sterilising finishes applied to woven and nonwoven substrates. The dataset spans 1,411 patent families filed between 2015 and 2026, with the earliest visible trend data starting at 29 filings in 2017 and rising to a peak of 79 in 2019 before declining toward single digits by 2026 (a partial year). This is not an emerging field being staked out for the first time — it is a field where the foundational chemistry claims were filed years ago and current activity is incremental.
The IPC composition confirms this: treatment chemistry (D06M) and biocide agents (A01N) carry more than twice the filing volume of medical sterilising claims (A61L), and fiber-structure claims (D01F) sit close behind. Filing venue data shows Japan and the United States ahead of Europe, WIPO and India, meaning freedom-to-operate checks should prioritise those two jurisdictions first.
Filing trend and technology composition
Annual filing counts and IPC subclass distribution across the 1,411 families in this dataset. Because publication typically lags filing by around 18 months, the most recent one to two years will understate true filing activity.
Filings peaked in 2019 and have declined since
From 29 filings in 2017, activity climbed to a peak of 79 in 2019, held near the 2022 midpoint of 46, and has fallen toward single digits by 2026 — a partial year that will revise upward somewhat as later publications land, but not enough to reverse the downward trend visible from 2019 onward.
Treatment chemistry and biocides dominate the claim space
D06M (textile chemical treatment, 543 records) and A01N (biocides/agrochemicals, 432) together account for more filings than the next four subclasses combined. D01F (fiber structure, 357) and A61L (sterilising, 214) follow, with C08K polymer additives, D02G yarn texturing, and the medical-adjacent A61K and A61F subclasses making up a smaller, more specialised tail.
Shares are the percentage of the 1,411 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Antimicrobial Textile Functional Fiber with Eureka
This page is one run against one query. Ask Eureka your own question about antimicrobial textile functional fiber and every answer comes back with the patent numbers behind it.
Try EurekaThe documents anchoring this field
Antimicrobial fiber and its production method (US20100113537A1, ALCARE CO., LTD.)
An antimicrobial fiber bearing an anionic functional group, produced so that part of that group forms a quaternary ammonium salt (preferably cetylpyridinium) and another part forms an antimicrobial metal salt (preferably zinc). The fiber is preferably a carboxyalkylated cellulose fiber, and the filing also covers a resulting antimicrobial fiber product plus production and regeneration methods.Filed 2010-05-06. Illustrates the dual-salt functionalisation approach that recurs across later filings in this space.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5503840A | Antimicrobial compositions, process for preparing the same and use | 281 |
| 2 | US5405644A | Process for producing antimicrobial fiber | 197 |
| 3 | US20100272938A1 | Hydraulically-Formed Nonwoven Sheet with Microfibers | 190 |
| 4 | US6897349B2 | Silver-containing compositions, devices and methods for making | 182 |
| 5 | US6158253A | Seamless, form fitting foot sock | 172 |
| 6 | US6419839B1 | Pool and spa filter media | 147 |
| 7 | US20060141015A1 | Antimicrobial material | 144 |
| 8 | US5762797A | Antimicrobial filter cartridge | 130 |
| 9 | US6584668B2 | Method of manufacturing yarns and fabrics having a wash-durable non-electrically conductive topically applied… | 119 |
| 10 | US20040058102A1 | Moisture transfer liner for alpine boots, snowboard boots inline skates, hockey skates, hiking boots and the … | 116 |
Citation counts favour older filings in any searched corpus and should be read as a measure of influence on later filings, not as a signal 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 mean for a filing decision
Four read-throughs from the trend, composition and citation data above.
The field is past its filing peak
Annual filings rose from 29 in 2017 to a peak of 79 in 2019, then declined through the 2022 midpoint of 46 down toward single digits by 2026. New entrants should treat this as a mature technology base rather than a land grab, and expect denser prior art on any broad chemistry claim.
Treatment chemistry is the most contested ground
D06M textile treatment and A01N biocide claims together outnumber every other subclass. Fresh filings in silver-salt or quaternary-ammonium finishing chemistry are entering the most crowded part of the landscape, where design-around work is hardest.
Japan leads filing volume, ahead of the US
Japan's 352 filings and the US's 269 outpace EPO (186), WIPO (122), India (88) and Canada (51). Any freedom-to-operate search that skips Japanese-language prior art is missing the single largest venue in this dataset.
The oldest anchors still carry the most influence
The most-cited records in this corpus were filed well before the 2019 peak, which is expected: citation counts accumulate over time and favour earlier filings. Treat high citation counts as evidence of doctrinal influence, not proof that a claim is still commercially central.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to antimicrobial textile functional fiber, with the prior art for and against each one.
Who holds the claim space, and where the ground is open
Filing counts are concentrated among a small group of assignees with a long tail of single- or few-filing entrants. Momentum has flattened even among the historically active names.
Collaboration is limited and mostly inventor-linked
Only 10 co-assignee pairs appear in the dataset, the strongest being a company-inventor pairing filed seven times together. This points to a field where most assignees file independently rather than through joint ventures or cross-licensing arrangements.
Even the historically active names have gone quiet
Several of the assignees with the deepest filing history show zero filings in the latest year and year-on-year declines of -100% where prior-year activity existed. This is consistent with the broader 2019-to-2026 decline rather than a company-specific pullback.
Japanese filings outnumber every other venue
With 352 filings, Japan is the largest single receiving office in this dataset, ahead of the US at 269. Assignees building a defensive or blocking position in this space should treat Japanese filings as the primary prior-art set to clear.
| Assignee | Recent year | YoY |
|---|---|---|
| Green Impact Holdings | 0 | — |
| Ascend Performance Materials | 0 | -100% |
| ARGENLAB GLOBAL | 0 | — |
| LifeGuard AG | 0 | — |
| Milliken & Company | 0 | — |
| Coupron Inc. | 0 | -100% |
| Kuraray Co., Ltd. | 0 | — |
| Toray Industries, Inc. | 0 | — |
Where to take this analysis
The trend and composition data point to a mature field with specific gaps rather than open ground. These are reasonable next steps for a team deciding whether and where to file.
Run a design-around check on D06M and A01N claims
These two subclasses carry the densest claim coverage in the dataset. Before drafting new treatment-chemistry claims, map which of the existing 543 D06M and 432 A01N filings actually cover the specific salt, substrate or process step you plan to claim.
Explore the IPC breakdown in EurekaCheck Japanese and US prior art first
With 352 Japanese and 269 US filings against 186 at the EPO, a freedom-to-operate search that starts in Europe or WIPO will miss the largest share of relevant prior art. Prioritise these two offices in any clearance work.
Search assignees by venue in EurekaWatch the under-claimed branches
Yarn texturing, polymer-additive masterbatches and regenerable finishes show thinner claim density than the core chemistry subclasses. These are the more realistic entry points for a new filing strategy.
Review white-space branches in EurekaCommon questions on antimicrobial textile fiber patents
No — filing activity peaked in 2019 at 79 filings and has declined since, sitting at 46 by the 2022 midpoint and down toward single digits by 2026. The 2026 figure is a partial year and will revise upward somewhat as later publications appear, given the roughly 18-month lag between filing and publication, but the multi-year downward trend from 2019 onward is unlikely to reverse. Treat this as a field with a mature, already-claimed core rather than one in an early growth phase.
D06M (textile chemical treatment) and A01N (biocides and agrochemicals) carry the largest share of records at 543 and 432 respectively, together outweighing every other subclass combined. D01F (fiber structure and composition) and A61L (sterilising and disinfecting) follow at 357 and 214. If you are drafting a new claim, expect the densest prior art in treatment chemistry and biocide formulation, with comparatively more room in yarn texturing (D02G) or polymer-additive (C08K) claims.
Japan and the United States are the two largest receiving offices in this dataset, with 352 and 269 filings respectively, ahead of the EPO (186), WIPO/PCT (122), India (88) and Canada (51). A clearance search that only covers Europe or PCT filings will miss the majority of relevant prior art in this field. Japanese-language filings in particular deserve dedicated review given their volume.
This ALCARE CO., LTD. filing claims an antimicrobial fiber bearing an anionic functional group, where part of that group forms a quaternary ammonium salt (preferably cetylpyridinium) and another part forms an antimicrobial metal salt (preferably zinc), typically on a carboxyalkylated cellulose fiber substrate. It also covers the production method and a regeneration method for restoring antimicrobial activity after use. Anyone working with dual-salt functionalisation on anionic cellulose fibers should review this filing's claim scope closely before finalising a similar approach.
Recent-year momentum data shows several of the historically most active assignees at zero filings in the latest year, with year-on-year changes of -100% where prior activity existed. This pattern is consistent across multiple leading names rather than isolated to one company, and lines up with the broader post-2019 decline in filing volume across the dataset. It suggests the core chemistry has already been claimed by incumbents and new entrants are more likely to find opportunity in adjacent, less-claimed branches.
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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.