Porous Surface Coating for Synthetic Leather Patents: Leaders & Trends 2026
- Two-thirds concentrated. The top 5 assignees hold 66.7% of all 165 records in scope — a field with a clear leader group, not a fragmented one.
- Filing has cooled sharply. From 2021 to 2024, filings fell -100%, with 2023 as the peak year at 8 records before the drop-off.
- Coating claims spill into unrelated hardware. D06N coated-fabric claims sit at 22.4% of records, but battery (H01M, 17.0%) and filtration (B01D, 12.1%) classes appear almost as often — the pore-forming chemistry is shared property, not leather-exclusive.
Filing growth compares 2021 (2 records) with 2024 (0) — 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 165 records in scope (CR5), not by the ranked leaders only.
What this patent set actually covers
Porous surface coating technology for synthetic leather sits at the intersection of textile finishing and general particulate coating chemistry. The search set captures documents that combine claims on synthetic leather surface coating or porous coating layers with process-level features — mechanical foaming, pore formers, breathability, embossing pattern transfer, coating adhesion, or gloss control. That combination pulls in records that are not leather-specific at all: pore-former chemistry used in emission filters, battery electrodes and separation membranes reads on the same claim language.
That overlap is the first thing to understand before reading the rest of the page. A porous coating claim written broadly enough to cover foam-structured surface layers can be asserted or cited across leather, filtration and battery-electrode prior art alike, which is why the IPC composition below spans eight subclasses rather than clustering tightly around one.
Let an AI agent run this analysis on your own technology
Pick a task. Every answer cites the patents behind it.
Filing trend and technology composition
Publication typically lags filing by around 18 months, so the last one to two years in any chart below are still filling in and should not be read as a genuine slowdown on their own.
Filing trend: a sharp peak, then a drop-off
Filings rose from 2 records in 2017 to a peak of 8 in 2023, then fell to 0 by 2024 — a -100% change over the 2021-to-2024 window. Because 2025 and 2026 are not yet complete in the record, the apparent drop after 2023 should be read as partly an artefact of publication lag rather than a confirmed retreat from the technology.
Technology composition: coated fabrics lead, but adjacent classes are close behind
D06N (coated and impregnated fabrics) is the largest single class at 22.4% of the 165 records in scope, followed by H01M (batteries, cells and fuel cells) at 17.0% and B32B (layered products and laminates) at 15.8%. A61L (sterilising and disinfecting), B01D (separation processes) and A62B (rescue and life-saving) each sit above 11%, and B22F (powder metallurgy) closes the list at 8.5% — evidence that porous coating claims in this set are as often written for filtration, protective equipment or battery components as for leather itself.
Shares are the percentage of the 165 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Porous Surface Coating for Synthetic Leather with Eureka
This page is one run against one query. Ask Eureka your own question about porous surface coating for synthetic leather and every answer comes back with the patent numbers behind it.
Try EurekaA recent filing that shows where the claim language is heading
WO2026082157A1 — Porous coating for emission treatment filter, preparation method of the same
A coating slurry for coating a substrate of an emission treatment filter includes a structure material and a polymeric pore former. The polymeric pore former includes particles with a mean particle size D50 between 2 μm and 25 μm, and the slurry has a viscosity greater than 100 mPa·s at a shear rate of 10 s-1.Filed by BASF Mobile Emissions Catalysts LLC, published 2026-04-23 — illustrates how pore-former particle-size and slurry-viscosity claims, the same variables used to control breathability and gloss in synthetic leather coatings, are being staked out in adjacent filtration hardware.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6210715B1 | Calcium phosphate microcarriers and microspheres | 327 |
| 2 | US20160104882A1 | Nanocomposite battery electrode particles with changing properties | 179 |
| 3 | US6358532B2 | Calcium phosphate microcarriers and microspheres | 106 |
| 4 | US20100297531A1 | Immobilized fluid membranes for gas separation | 51 |
| 5 | US20010021389A1 | Calcium phosphate microcarriers and microsphers | 49 |
| 6 | US20080299377A1 | Method for preparing a porous inorganic coating on a porous support using certain pore formers | 46 |
| 7 | JP1990061181A | Leather-like sheet and production thereof | 46 |
| 8 | US20080251081A1 | Systems for Removing Dimethyl Sulfoxide (Dmso) or Related Compounds or Odors Associated with Same | 44 |
| 9 | US20050261427A1 | Thermoplastic polymer composition | 43 |
| 10 | US20140248509A1 | Coating compositions | 39 |
Citation counts favour older documents simply because they have had longer to accumulate citations inside the searched corpus — treat this table as a signal of historical influence, not of which claims matter most today.
Each row carries its publication number; 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 data tells a filing strategist
Three patterns stand out once the ranking, the trend and the IPC spread are read together.
The field has a clear leader group
The top 5 assignees combine for 110 of the 165 records in scope, and the top 10 extend that to 133 records, or 80.6%. A single leader holds 41 records against a fifth-place figure of 10 and a tenth-place figure of 4 — the drop-off from leader to the rest of the top 10 is steep.
Peak filing has already passed — provisionally
2023 was the strongest year on record at 8 filings, but the count fell to 0 by 2024. Because publication lag means 2025-2026 data is still incomplete, this should be read as the confirmed picture through 2024 rather than proof the technology is abandoned.
Pore-former chemistry is shared, not leather-exclusive
Nearly as many records carry a battery-electrode classification as carry the core coated-fabric class, and filtration (B01D) and rescue equipment (A62B) each clear 11%. A claim written around foaming or pore-former particle size can read across several unrelated product categories.
Co-filing is limited and clustered
Only 10 co-assignee pairs appear across the dataset, and the strongest repeated pairings involve the same small set of individual co-inventors rather than cross-company joint ventures — collaboration here looks more like internal inventor teams than industry alliances.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to porous surface coating for synthetic leather, with the prior art for and against each one.
Who is filing, and where the gaps sit
The ranked leaders account for most of the field's activity, leaving a long tail of single- or low-filing entrants. That structure matters for freedom-to-operate work: a small number of assignees hold most of the core claim space, but several technically specific sub-areas remain thinly claimed.
One assignee sets the pace
The leading assignee's 41 records is more than four times the fifth-place count of 10, and more than ten times the tenth-place count of 4 — freedom-to-operate review for this assignee's portfolio is not optional for anyone entering the space.
A long tail beyond the leaders
Once past the top 10 (133 of 165 records, 80.6%), the remaining 45 assignees split the rest of the field thinly. That tail is where narrow, defensible filings are still possible if the claim is drawn tightly around an unaddressed variable.
Momentum has stalled across the board, provisionally
Every one of the leading assignees shows 0 filings in the latest tracked year. Given the roughly 18-month publication lag, this is consistent with a pause in new publications reaching the record rather than a confirmed exit by any of these firms.
| Assignee | Recent year | YoY |
|---|---|---|
| Kuraray Co., Ltd. | 0 | — |
| ABELA PHARMACEUTICALS INC | 0 | — |
| Sila Nanotechnologies Inc. | 0 | — |
| Corning Incorporated | 0 | — |
| CAP BIOTECH | 0 | — |
| Scoperta Inc. | 0 | — |
| LG Energy Solution Ltd. | 0 | -100% |
| COZEAN COLETTE | 0 | — |
Where to take this analysis
The numbers above establish the shape of the field. Turning that into a filing or freedom-to-operate decision means drilling into specific claims and specific assignees.
Check freedom-to-operate against the leader group
With one assignee holding 41 of 165 records and the top 5 holding 66.7% of the field, any new filing in core coated-fabric or lamination claims should be checked against this group's granted claims first.
Run an FTO check in EurekaProbe the under-claimed sub-areas
Pore-former particle-size control, embossing-pattern transfer and gloss-control additives all show up in the IPC spread without dense coverage — a candidate list for a narrower, more defensible filing.
Explore white space in EurekaTrack whether 2025-2026 filings revive the trend
The -100% figure through 2024 is real but incomplete; publication lag means the next 12-18 months of data will show whether the 2023 peak was a high point or a plateau.
Set a filing alert in EurekaCommon questions on this landscape
The ranking covers 55 assignees, with a single leader holding 41 of the 165 records in scope. The top 5 assignees together hold 66.7% of all records, and the top 10 extend that to 80.6%, so the field is concentrated among a small leader group rather than evenly spread. Anyone evaluating freedom-to-operate here should prioritise checking that leader group's granted claims before looking further down the ranking.
Filings peaked at 8 records in 2023, then fell to 0 by 2024, a -100% change over that three-year window. However, publication typically lags filing by around 18 months, so 2025 and 2026 figures are still incomplete and should not be read as confirmation the technology has been abandoned. The honest read is: confirmed decline through 2024, with the true 2025-2026 picture still forming.
Porous coating claims are often written around generic variables — pore-former particle size, foaming method, slurry viscosity — that apply equally to battery electrodes, emission filters and leather surface finishes. In this dataset, H01M (batteries) appears in 17.0% of records and B01D (separation processes) in 12.1%, nearly as often as the core D06N coated-fabric class at 22.4%. A claim drawn broadly enough to cover pore-forming chemistry in general will read across all of these product categories.
The IPC composition shows several sub-areas below the density of the core coated-fabric and lamination classes, including pore-former particle-size control for breathability, embossing-pattern transfer on porous layers, and gloss-control additives for foamed coatings. These branches appear in the dataset but are not dominated by the leading assignees the way core coating claims are. A tightly drawn claim in one of these areas has a better chance of clearing prior art than a broad coated-fabric claim.
WO2026082157A1, filed by BASF Mobile Emissions Catalysts LLC and published 2026-04-23, claims a coating slurry for emission treatment filters using a polymeric pore former with particle size between 2 and 25 micrometres and a slurry viscosity above 100 mPa·s. It is written for filter substrates, not leather, but the particle-size and viscosity parameters it claims are the same control variables used to tune breathability and gloss in synthetic leather coatings. Anyone drafting claims around those same numeric ranges for a leather application should review this filing's scope before finalising claim language.
Research Porous Surface Coating for Synthetic Leather in depth with Eureka
Go past this page: query the whole porous surface coating for synthetic leather 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.