Leather Finishing Patents: Who Leads, Where the Gaps Are 2026
- Tanning and treatment claims dominate. C14C covers 59.7% of the 77 records in scope, well ahead of polymer compositions and biofabrication classes.
- Filing peaked in 2017 and has since cooled. Activity ran from 14 records that year to a -33% slide between 2021 and 2024, the last year with complete data.
- One leader, then a long tail. The ranked leader holds 28 records against 7 at fifth place and 2 at tenth, across 26 companies in the ranking.
Filing growth compares 2021 (3 records) with 2024 (2) — 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.
What this landscape covers
Leather finishing and performance testing sits at the intersection of surface chemistry and materials qualification: topcoat abrasion resistance, flex endurance, colour fastness, water vapour permeability, restricted-substance compliance and accelerated ageing are the tests that decide whether a finish is fit for footwear, upholstery or automotive interiors. This dataset tracks 77 published records filed between 2015 and mid-2026 that combine finishing or testing language with at least one of these performance criteria.
The record set spans conventional tanning and polymer-coating chemistry alongside a newer thread of engineered skin and biofabricated leather substitutes, visible in the microorganism and fermentation IPC classes. That mix matters for anyone assessing freedom to operate: a finish claim that reads clean against traditional bovine leather prior art may still run into biofabrication substrate claims filed by a different set of assignees.
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Filing trend and technology composition
Two views of the same 77 records: how filing activity has moved year over year, and which IPC subclasses carry the claim density today.
A 2017 peak followed by a multi-year pullback
Filings ran at 14 records in 2017, the peak so far. The trend then eased, and the comparable complete-year window shows a -33% move from 2021 (3 records) to 2024 (2 records) — 2025 and later are still filling in as publications lag behind filing by roughly 18 months, so treat the most recent years as provisional rather than a confirmed slowdown.
Tanning and polymer chemistry lead; biofabrication is a distinct second track
C14C (tanning and leather treatment) appears in 59.7% of the 77 records, ahead of C08L polymer compositions at 36.4% and C12N microorganisms and genetic engineering at 31.2% — evidence that lab-grown and engineered-skin approaches now account for a meaningful share of filings alongside conventional wet-chemistry finishing. D06N coated fabrics, C08J polymer processing, C12P fermentation, C08G condensation polymers and B32B laminates each sit in single-digit-to-teens shares, marking narrower but active niches.
Shares are the percentage of the 77 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Leather Finishing and Performance Testing with Eureka
This page is one run against one query. Ask Eureka your own question about leather finishing and performance testing and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
WO2022098232A1 — Composition and process for leather dyeing with polycarbodiimides and dyes
The present invention relates to a novel dyeing composition suitable for dyeing leather, hides and/or pelts comprising at least one dyeing agent and at least one polycarbodiimide agent and optionally water-miscible organic solvent and/or optionally one or more plasticizer and/or optionally one or more dispersing agents and/or optionally one or more acidifying agents, to obtain leather that has good colour fastness according to ISO 11640:2012 and good lightfastness according to ISO105-B02 and/or to IUF 402 and that results in an outstanding uniform colouring throughout the leather.Filed by Stahl International B.V., published 2022-05-12.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6379751B1 | Imparting water-repellency with polysiloxanes containing carboxyl groups | 98 |
| 2 | US20190136060A1 | Engineered skin equivalent, method of manufacture thereof and products derived therefrom | 56 |
| 3 | US20170306428A1 | Engineered skin equivalent, method of manufacture thereof and products derived therefrom | 52 |
| 4 | US20190367732A1 | Engineered skin equivalent, method of manufacture thereof and products derived therefrom | 46 |
| 5 | US3968293A | Artificial leather sheet material | 26 |
| 6 | US3436303A | Water-laid leather substitute containing leather fibers,staple fibers and polyurethane aqueous slurry and met… | 26 |
| 7 | US10273549B2 | Engineered skin equivalent, method of manufacture thereof and products derived therefrom | 21 |
| 8 | GB1273524A | Shoe uppers and shoe upper components | 20 |
| 9 | US3605294A | Shaped articles | 19 |
| 10 | GB1177483A | Flexible Sheet Material. | 19 |
Citation counts favour older filings that have had more time to accumulate citations within the searched corpus; read them as a signal of influence, 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 mean for a filing decision
Three findings that change how a search or a design-around should be scoped in this space.
Traditional finishing chemistry is the most crowded ground
Nearly six in ten records touch tanning and leather-treatment claims, meaning new colour-fastness or topcoat work is more likely to run into prior art here than in any adjacent class.
Engineered-skin and biofabrication claims are a separate battleground
The engineered skin equivalent filings among the most-cited records show this isn't a fringe activity — it's a parallel claim set that a finishing-chemistry search alone will miss.
Read the recent slowdown cautiously
The three-year comparison is the most recent window that isn't still filling in from publication lag; treat 2025 and 2026 figures as incomplete rather than evidence of a further drop.
One leader, then a fast drop-off
The gap from the leading assignee to fifth place, and again to tenth, suggests most of the 26 ranked companies hold only a handful of records each — a long tail rather than a second tier of equal-sized competitors.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to leather finishing and performance testing, with the prior art for and against each one.
Who holds the claims, and where the gate sits
The ranking covers 26 companies with published records in scope. It's a wide field with one clear leader rather than a tight cluster of comparable filers.
A single leader well ahead of the field
The top-ranked assignee's record count is well clear of fifth place at 7, suggesting a sustained filing programme rather than opportunistic single filings.
A cluster of active but smaller programmes
Filers around fifth place show enough activity to indicate an ongoing research line in finishing or testing chemistry, without the scale of the leader.
Most of the field files thinly
By tenth place, record counts drop to single digits close to the minimum, consistent with universities, startups and biofabrication entrants making a small number of foundational filings.
Co-filing is rare but concentrated where it happens
The strongest co-assignee link pairs a university with a biofabrication company, pointing to lab-to-commercial partnerships as the main driver of joint filings in this space.
| Assignee | Recent year | YoY |
|---|---|---|
| King's College London | 0 | — |
| VitroLabs Inc | 0 | — |
| ProKlean Tech Pvt Ltd | 0 | — |
| Sustainable Community Development LLC | 0 | — |
| Porvair | 0 | — |
| DSM IP Assets B.V. | 0 | — |
| Dunlop Ltd | 0 | — |
| ILIC DUSKO | 0 | — |
Where to take this next
The dataset points to two follow-up questions: how durable is the leader's position, and how exposed is new finishing work to the engineered-skin claim set.
Run a freedom-to-operate check against the leader's portfolio
With 28 records against a fifth-place count of 7, the leading assignee's claims are the first thing to clear before filing new topcoat or colour-fastness work.
Explore assignee portfolios in EurekaMap the biofabrication claim set separately from conventional finishing
The C12N and C12P classes represent a distinct technical community; a search scoped only to tanning and coating chemistry will miss it entirely.
Run a full-text IPC breakdown in EurekaCommon questions about this landscape
One assignee leads the ranked field with 28 records, well ahead of the fifth-ranked filer at 7 and the tenth-ranked filer at 2. The ranking covers 26 companies total, so this is a field with a clear leader and a long tail of smaller filers rather than several similarly-sized competitors. Anyone assessing freedom to operate should start by clearing the leader's portfolio before looking further down the list.
Filing peaked in 2017 at 14 records and has since eased; the most recent complete comparison shows a -33% change from 3 records in 2021 to 2 in 2024. Data from 2025 onward is still incomplete because publication typically lags filing by around 18 months, so it would be premature to call this a continuing decline. The safest reading is that activity has cooled from its 2017 peak but the very latest trend is not yet visible in published data.
Tanning and leather-treatment chemistry (IPC class C14C) appears in 59.7% of the 77 records in scope, making it the single most crowded claim area. Polymer compositions (C08L, 36.4%) and microorganism/genetic engineering approaches tied to engineered skin and biofabricated leather (C12N, 31.2%) are the next largest groups. Coated fabrics, polymer processing, fermentation, condensation polymers and laminates each cover smaller, more specific shares of the record set.
Yes. The presence of C12N and C12P classes at meaningful shares of the 77 records, along with highly-cited engineered skin equivalent filings, shows biofabrication is a substantial and distinct part of this landscape rather than a fringe topic. These filings often come from different assignees than the traditional tanning and coating chemistry filers, so a search limited to conventional finishing terms will miss this thread entirely. Treat it as a separate claim set requiring its own freedom-to-operate review.
WO2022098232A1 is a Stahl International filing, published 2022-05-12, covering a leather dyeing composition combining a dyeing agent with a polycarbodiimide agent, with optional solvents, plasticizers, dispersing agents and acidifying agents. The stated goal is colour fastness meeting ISO 11640:2012 and lightfastness under ISO105-B02 or IUF 402, with uniform colouring throughout the leather. It is a formulation-and-process claim tied to specific test standards, so anyone formulating a competing dyeing composition for similar fastness performance should review its claim scope directly rather than relying on the abstract 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.