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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/plasma-and-ionizer-air-treatment-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Home AppliancesPlasma and Ionizer Air Treatment Patents: Who Holds the Ground
- One clear leader, then a long tail. the top-ranked assignee holds 7 records against a fifth-place count of 2 and a tenth-place count of 1 across the 10 companies the ranking covers.
- Filing activity peaked in 2022 at 7 records before the most recent, still-partial years — a reminder that publication lag understates the latest filings.
- Sterilising and disinfecting claims dominate the class mix A61L appears on 57.7% of the 26 records in scope, more than double the share of any other IPC subclass.
26
Published Records
US
Leading Jurisdiction
10
Active Filers Ranked
2022
Peak Filing Year
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What this landscape covers
This review tracks 26 published records at the intersection of plasma air treatment and bipolar ionizer technology, filtered against terms covering ozone generation, discharge electrodes, particle charging, aldehyde byproducts, efficacy claims and safety standards. The scope spans filings from 2015 through the 2026 data cut-off, giving a working view of how sanitizing and ionizing air-treatment claims have been staked out across jurisdictions.
Because publication typically lags filing by around 18 months, the most recent years in the trend line are undercounts rather than a genuine slowdown. Reading the filing curve requires discounting the last one or two years accordingly.
Filing activity by year
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Plasma and Ionizer Air Treatment 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
The Data
Filing trends and technology composition
Two views of the same 26-record dataset: how filing activity has moved year over year, and which IPC subclasses carry the claims.
Filing trend, 2017-2026
Filings were flat at the start of the window and rose to a peak of 7 records in 2022, the strongest single year in the dataset. Growth rate is not computable from this window since fewer than four complete years remain once publication lag is accounted for, but the 2022 peak marks the point of heaviest documented activity.
IPC subclass composition
A61L (sterilising and disinfecting) appears on 57.7% of the 26 records in scope, well ahead of F24F (air conditioning and ventilation) at 38.5% and B01D (separation processes) at 23.1%. Because a single record can carry several IPC classes, these shares add up to more than 100% and should be read as overlapping claim coverage, not a partition of the field.
Shares are the percentage of the 26 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 Plasma and Ionizer Air Treatment covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Plasma and Ionizer Air Treatment with Eureka
This page is one run against one query. Ask Eureka your own question about plasma and ionizer air treatment and every answer comes back with the patent numbers behind it.
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Most-cited records and a representative filing
Representative filing
Ion generating device and air conditioner comprising the same
LG ELECTRONICS INC.
Discloses an ion generating device built into an air conditioner housing: a blower drives airflow past a heat exchanger to a separate ionizer unit, whose hollow body carries its own fan and a case-hole-equipped ionizer stage that generates ions into the passing air stream.Filed by LG Electronics Inc., published 2023-05-18.
Highest-cited records in scope
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20160263263A1 | Sanitizer | 43 |
| 2 | US20160367712A1 | Sanitizer with an ion generator and ion electrode assembly | 35 |
| 3 | US20160051713A1 | Fixture Sanitizer | 19 |
| 4 | WO2015138802A1 | sanitizer | 16 |
| 5 | US20170165387A1 | Sanitizer | 15 |
| 6 | US20150328349A1 | Sanitizer with an ion generator | 7 |
| 7 | US20200060018A1 | Corona effect plasma device and plasma reactor | 5 |
| 8 | US10124083B2 | Sanitizer with an ion generator and ion electrode assembly | 4 |
| 9 | EP4180736A1 | Ion generating device and air conditioner comprising the same | 3 |
| 10 | US9950086B2 | Fixture sanitizer | 3 |
Citation counts reflect influence within the searched corpus and skew toward 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 Plasma and Ionizer Air Treatment 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 filing strategy
Three patterns stand out once the record set is read against its denominators rather than as a raw count.
Class concentration
57.7% of 26 records
carry an A61L sterilising/disinfecting class
Sanitizing claims crowd the core
More than half the dataset touches A61L, meaning any new filing aimed at disinfection efficacy is landing in the most densely claimed part of the field. F24F and B01D trail well behind, suggesting the ventilation and filtration integration layers carry comparatively lighter claim density.
Read against the 26-record total, not against each other.
Filing cadence
Peak year: 2022 (7 records)
highest single-year filing count in the window
Activity is uneven, not rising steadily
The trend runs from zero in 2017 to zero again by the 2026 cut-off, with 2022 the clear high point in between. That shape looks more like a cluster of activity around a mid-window period than a sustained ramp, and the tail years are undercounted due to publication lag.
Discount the final one to two years when reading momentum.
Ownership shape
Leader: 7 · Tenth place: 1
across the 10 ranked companies
One filer well ahead, then a thin tail
The ranked leader's count is well above the rest, with the ranking dropping to single digits by fifth place and to one record by tenth. That gap suggests the leader is defending a broader claim set while the remaining ranked entities each hold narrow, single-topic positions.
The ranking covers 10 companies only, not a top-50 or top-100 list.
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 plasma and ionizer air treatment, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Plasma and Ionizer Air Treatment 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 leader holds a meaningfully larger position than the rest of the field, but the co-assignee data and the recent-year momentum figures both point to a market where most participants are filing narrowly rather than building a portfolio.
Leader
7 records
top-ranked assignee
A single filer ahead of the pack
The top-ranked assignee's count is more than three times the fifth-place figure, indicating a sustained filing programme rather than a one-off application. Recent-year momentum data shows this activity has not continued into the latest year, consistent with the broader publication-lag pattern across the dataset.
Based on the 10-company ranking in this dataset.
Collaboration
1 co-assignee pair
strongest pairing: 2 shared filings
Collaboration is rare in this field
Only one co-assignee pairing appears in the dataset, and even that strongest pair shares just two filings. Most entities in the ranking appear to be filing independently rather than jointly, which limits how much can be inferred about alliance structures from this evidence.
Co-filing signal is thin across the ranked set.
Recent momentum
-100% YoY
for a mid-ranked assignee in the latest year
Momentum has stalled across ranked assignees
Every assignee tracked for recent-year momentum shows zero filings in the latest year, and one shows a full year-over-year decline. This is consistent with publication lag rather than necessarily a real slowdown, but it means the current dataset cannot support claims about which filer is currently accelerating.
Treat the latest year as incomplete, not as a trend reversal.
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| ROBERT MICHAEL E | 0 | — |
| LG Electronics Inc. | 0 | — |
| DM TEC | 0 | — |
| TECHKNOWGREEN SOLUTIONS LTD (TSL) | 0 | -100% |
| ECOVIOX INT LLC | 0 | — |
| AIRINSPACE S E | 0 | — |
| United Science & Technology Commercialization Center Cooperative | 0 | — |
| Shenzhen Yuanqi Environmental Energy Technology Co., Ltd. | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Plasma and Ionizer Air Treatment 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 analysis
The dataset points to specific next steps depending on whether the goal is defensive clearance or offensive filing.
Map claims against the A61L cluster
Before drafting a disinfection-efficacy claim, check it against the 57.7% of records already sitting in A61L to find where a narrower, more defensible claim scope exists.
Explore the IPC breakdown in EurekaWatch the leader's next filing
With one assignee holding a position well ahead of the rest of the ranked field, tracking its next publication is the most direct early signal of where the core claim space is moving.
Set up assignee tracking in EurekaTest white space claims
The under-claimed sub-areas identified here have not been validated against full prior art; a freedom-to-operate search on any of them is the logical next step.
Run a white space search in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Plasma and Ionizer Air Treatment 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 on plasma and ionizer air treatment patents
This dataset's assignee ranking covers 10 companies, with the top-ranked assignee holding 7 records against a fifth-place count of 2 and a tenth-place count of 1. That gap indicates one filer has built a broader position while most others in the ranking hold only a small number of records each. The ranking reflects only the companies captured by this search string and scope, not the entire global market for ionizer air-treatment technology.
In this dataset the two terms overlap heavily with sterilising and disinfecting claims, since A61L appears on 57.7% of the 26 records in scope. Plasma-based claims tend to center on discharge electrode design and ozone generation control, while bipolar ionizer claims more often address particle charging and air-conditioning integration under F24F, which covers 38.5% of records. The overlap means many filings combine both approaches rather than treating them as separate technical routes.
Filing activity in the tracked window rose to a peak of 7 records in 2022, the highest single year observed. The years immediately before and after that peak are lower, and the most recent years in the dataset are understated because publication typically lags actual filing by around 18 months. A precise growth rate cannot be stated from this window because fewer than four complete years remain once that lag is accounted for.
A61L, covering sterilising and disinfecting, is the densest class in this dataset at 57.7% of the 26 records in scope, making it the first place to check for overlapping claims. F24F (air conditioning and ventilation) and B01D (separation processes) follow at 38.5% and 23.1% respectively. Because records can carry multiple IPC classes, a single new filing may need clearance checks against more than one of these classes simultaneously.
Sub-areas such as aldehyde byproduct suppression circuitry, cyclone-integrated ionizer stages and discharge electrode wear detection show comparatively lighter filing density than the core sterilising and disinfecting cluster in this dataset. That lighter density does not guarantee an easy path to grant, since it may simply reflect a smaller addressable niche rather than an unclaimed opportunity. A freedom-to-operate search focused specifically on those branches is the appropriate next step before drafting claims there.
Answers are grounded in the same dataset. Derived from a Patsnap search on Plasma and Ionizer Air Treatment 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.