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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/electrode-coating-uniformity-control-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Battery Manufacturing Equipment · Patent LandscapeElectrode Coating Uniformity Control Patents: Who Holds the Slot-Die and Areal-Loading Claims
- Filings peaked in 2020 at 18 records and the 2021-to-2024 span shows a -100% swing, though 2025-26 data is still filling in under the usual 18-month publication lag.
- One leader sits well ahead of the field at 22 records against a fifth-place mark of 7 and a tenth-place mark of 3 across the 13 ranked assignees.
- Coating apparatus claims dominate the technology mix B05C covers 73.8% of the 80 records in scope, while adjacent process and battery-cell classes trail well behind.
80
Published Records
-100%
Filing Growth 2021→2024
EP
Leading Jurisdiction
13
Active Filers Ranked
Filing growth compares 2021 (6 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.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Field Overview
What this landscape covers
Electrode coating uniformity control sits at the intersection of precision coating hardware and lithium-ion electrode manufacturing. The search scope pulls records that combine electrode coating uniformity or slot die coating language with concrete process controls -- areal loading deviation, edge thickening, coating window definition, slurry rheology management, intermittent coating, and web speed control. That combination captures equipment claims and process claims together, rather than treating them as separate fields.
80 published records sit in scope between 2015 and the 2026-07-31 cut-off. The set spans slot-die hardware, coating process patents, and a smaller cluster of adjacent filtration and testing claims -- a mix that reflects how uniformity control is engineered as much through the die and web-handling system as through the slurry formulation itself.
Filing activity and technology mix, 2015-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Electrode Coating Uniformity Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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The Data
Filing trend and technology composition
Two views of the same 80-record set: how filing activity has moved year over year, and which IPC subclasses carry the claims.
Filing trend, 2017-2026
Filings rose from 3 records in 2017 to a peak of 18 in 2020, then the 2021-to-2024 span moved from 6 down to 0, a -100% change the dataset records directly. Treat 2025 and 2026 as incomplete rather than as evidence of a further decline, since publication typically lags filing by around 18 months.
Technology composition by IPC subclass
B05C (coating apparatus) appears in 73.8% of the 80 records and B05D (coating processes) in 52.5%, confirming this is primarily an equipment-and-process field. H01M (battery cells) appears in 22.5% of records, and smaller shares extend into filtration membranes (B01D), plastics shaping (B29C), material testing (G01N), OLED-adjacent coating (H10K) and photosensitive materials (G03C) -- each of these is a spillover zone from adjacent industries applying the same coating-uniformity techniques.
Shares are the percentage of the 80 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Electrode Coating Uniformity Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
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This page is one run against one query. Ask Eureka your own question about electrode coating uniformity control and every answer comes back with the patent numbers behind it.
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Representative and most-cited filings
Representative Filing
Slot Die Coating Device Having Air Vent (US20220134378A1)
LG ENERGY SOLUTION, LTD.
LG Energy Solution's filing describes a slot-die coating apparatus for depositing electrode active material slurry onto a current collector, using a coating roller with a lower die and an upper die stacked to discharge two separate slurry streams, each fitted with its own air vent to manage the coating bead.Filed by LG Energy Solution, Ltd., published 2022-05-05.
Most-cited records in this landscape
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20060257785A1 | Method of forming a photoresist element | 129 |
| 2 | US6536605B2 | High performance composite membrane | 93 |
| 3 | US20020063093A1 | High performance composite membrane | 64 |
| 4 | US6132804A | High performance composite membrane | 46 |
| 5 | WO1999062623A1 | High performance composite membrane | 35 |
| 6 | EP2799154A1 | Slot-die coating method, apparatus, and substrate | 18 |
| 7 | US20160079533A1 | Slot-die coating method, apparatus, and substrate | 16 |
| 8 | US20200147638A1 | Multi-reagent slot die coating process and useful devices | 14 |
| 9 | WO2012139767A1 | Vacuum assisted slot die coating techniques | 8 |
| 10 | WO2006124552A2 | Method of forming a photoresist element | 8 |
Citation counts reflect influence inside this searched corpus and favour older records; they are not a measure of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Electrode Coating Uniformity Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the numbers mean for a filing decision
Three read-throughs from the trend, the class mix and the citation table -- useful for deciding where a new filing has room to stand.
Filing Momentum
Peak 18 (2020)
records in the peak year
Activity has cooled from its 2020 high
The filing trend climbed from 3 records in 2017 to 18 in 2020, then the documented 2021-to-2024 span fell from 6 to 0, a -100% move. That is a real slowdown in complete-year data, not an artefact of the recent publication lag -- though 2025-26 figures should still be read as provisional.
Based on the 2017-2024 complete-year filing trend
Technology Mix
73.8% B05C
of 80 records carry a coating-apparatus class
Hardware claims outweigh formulation claims
B05C (coating apparatus) and B05D (coating processes) together dominate the class mix, while H01M (battery cells) sits at 22.5% of records. That pattern says most of the claimed inventive step is in the die, roller and web-handling system rather than in the electrode chemistry itself.
Class shares sum above 100% because records carry multiple IPC codes
Concentration
22 vs 7 vs 3
leader, fifth place, tenth place
One filer leads, then a fast drop-off
Among the 13 ranked assignees, the leader holds 22 records against 7 at fifth place and 3 at tenth -- a steep gap after the top position rather than a gradual taper. New entrants are filing into a field with one heavy incumbent and a long tail of low-volume filers.
Counted across the 13 companies in the assignee ranking
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to electrode coating uniformity control, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Electrode Coating Uniformity Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is filing, and where the field is still open
The ranked assignees span battery makers, industrial coating specialists and diagnostics companies applying the same slot-die and uniformity-control techniques to different substrates.
Battery Manufacturing
22 records
leader's family count
A battery-cell maker leads the ranking
The top assignee's 22 records concentrate on slot-die hardware built specifically for electrode active-material slurry -- air vents, dual-die stacking, and coating-bead control aimed at lithium-ion electrode manufacturing lines.
Leader across the 13 ranked assignees
Industrial Coating & Membranes
5 of 5 top-cited
most-cited records are membrane patents
Membrane and filtration filings carry the citation weight
The most-cited records in this set are composite-membrane patents rather than battery-electrode patents, a reminder that citation counts here reflect an older, separate wave of filtration innovation that the current search also picks up.
From the most-cited records table
Diagnostics & Adjacent Fields
3 co-assignee pairs
recorded co-filing relationships
Diagnostics firms show up as repeat co-filers
Several ranked assignees are diagnostics or diabetes-care organisations rather than battery makers, and they account for the strongest of the three recorded co-assignee pairs -- evidence that precision-coating patent activity extends well beyond battery manufacturing into biosensor and test-strip coating.
Strongest pair recorded 3 shared filings
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| LG Energy Solution, Ltd. | 0 | — |
| F. Hoffmann-La Roche AG | 0 | — |
| 3M Innovative Properties Co. | 0 | — |
| Netherlands Organisation for Applied Scientific Research (TNO) | 0 | — |
| Koch Membrane Systems, Inc. | 0 | — |
| MicroChem Corp. | 0 | — |
| Roche Diagnostics GmbH | 0 | — |
| Roche Diabetes Care, Inc. | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Electrode Coating Uniformity Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this landscape from here
The dataset points to a field with one clear incumbent, a cooling filing trend through complete-year data, and technology composition concentrated in coating hardware rather than slurry chemistry.
Check freedom-to-operate against the leader's claims
With one assignee holding 22 of the ranked records, any new slot-die or dual-die filing should be checked against that portfolio's air-vent and coating-bead claims before development spend commits to a similar mechanical approach.
Run a freedom-to-operate search in Eureka →Map the under-claimed sub-areas against your own roadmap
Real-time areal loading feedback and rheology-integrated web speed control show comparatively little direct claim coverage in this set -- worth a closer look if your team is developing in-line quality control for coating lines.
Explore white space in Eureka →Track whether 2025-26 filings reverse the recent dip
Because publication lags filing by roughly 18 months, the apparent drop to 2024 needs revisiting once 2025 and 2026 data settles -- set an alert rather than treat the current trend line as final.
Set a filing alert in Eureka →Source: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Electrode Coating Uniformity Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions about this landscape
Among the 13 assignees in the ranked dataset, one company leads with 22 records, well ahead of the fifth-place assignee at 7 and the tenth-place assignee at 3. That leader's portfolio centres on slot-die coating hardware for lithium-ion electrode manufacturing, including dual-die and air-vent designs. The rest of the ranking includes industrial coating specialists and diagnostics companies applying similar coating-control techniques to non-battery substrates, so the field is not exclusively a battery-industry contest.
Filing activity rose from 3 records in 2017 to a peak of 18 in 2020, then the complete-year data for 2021 to 2024 shows a drop from 6 to 0, a -100% change. That is a genuine slowdown across years that have finished publishing. Figures for 2025 and 2026 are still incomplete because publication typically lags actual filing by around 18 months, so it is too early to call the current direction beyond that documented 2021-2024 span.
Slot die coating is one of the two search terms anchoring this dataset, alongside electrode coating uniformity, and it is combined with specific process controls such as coating window, slurry rheology, edge thickening, intermittent coating and web speed. In the technology composition, B05C (coating apparatus) covers 73.8% of the 80 records and B05D (coating processes) covers 52.5%, showing that most patented inventive work sits in the physical die and web-handling system rather than purely in the slurry formulation.
B05C, covering coating apparatus, appears in 73.8% of the 80 records in scope, and B05D, covering coating processes, appears in 52.5% -- together these define the field as primarily a hardware-and-process discipline. H01M, batteries and cells, appears in 22.5% of records, marking where coating claims tie directly to electrode manufacturing. Smaller classes such as B01D (filtration), B29C (plastics shaping), G01N (material testing), H10K (OLED-related coating) and G03C (photosensitive materials) show that the same coating-uniformity techniques get claimed across several adjacent industries, so a full clearance search should not stop at H01M alone.
The class mix and gate analysis point to real-time areal loading feedback control, edge-thickening correction specific to intermittent coating cycles, and rheology sensing integrated directly with web speed control as comparatively under-claimed relative to the dense core cluster of general slot-die apparatus patents. Multi-layer slot-die coating aimed at solid-state electrode structures is another area with limited direct representation in the current set. These are starting points for a novelty search, not guarantees of clear freedom to operate, since the underlying claim scope of the leader's portfolio still needs individual review.
Answers are grounded in the same dataset. Derived from a Patsnap search on Electrode Coating Uniformity Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.