Air Purification (Standalone) Patent Landscape 2026
The standalone air purification patent space comprises 6,313 patent families and is led by a tight cluster of Korean and Chinese consumer-electronics majors, with LG Electronics and Samsung Electronics sharing the top positions. Annual filings surged to a peak in 2020–2021 and have since eased, placing the field in a post-peak phase where consolidating incumbents and selective new entrants will set the next competitive boundary.
LG Electronics and Samsung Electronics lead a concentrated field
LG Electronics holds the top rank with 118 patent families, followed closely by Samsung Electronics and Gree Electric Appliance, each at 111 patent families, and Sharp and Coway at 97 each — a cluster so tight that the difference between first and fifth is only 21 patent families.
The top five filers together account for 27% of the combined output of the hundred largest filers, indicating moderate-to-high concentration at the apex with a meaningful long tail of challengers including Blueair, Midea Group, and Koninklijke Philips.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | LG Electronics Inc | 118 | |
| 2 | Samsung Electronics Co Ltd | 111 | |
| 3 | Gree Electric Appliance Inc of Zhuhai | 111 | |
| 4 | Sharp Corporation | 97 | |
| 5 | Coway Co Ltd | 97 | |
| 6 | Blueair | 85 | |
| 7 | Midea Group Co Ltd | 57 | |
| 8 | Qingdao Haier Air Conditioner General Corp Ltd | 56 | |
| 9 | Koninklijke Philips NV | 51 | |
| 10 | Seoul Viosys Co Ltd | 50 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Carrier Corporation | 50 | |
| 12 | Haier Smart Home Co Ltd | 50 | |
| 13 | Mitsubishi Electric Corporation | 43 | |
| 14 | GD Midea Air Conditioning Equip Co Ltd | 43 | |
| 15 | Chung Ang University Industry Academic Cooperation Foundation | 38 | |
| 16 | Mitsubishi Electric Home Appliance Co Ltd | 32 | |
| 17 | Daikin Industries Ltd | 32 | |
| 18 | LifeAire Systems LLC | 27 | |
| 19 | 3M Innovative Properties Co | 27 | |
| 20 | Fellowes Inc | 23 |
The incumbents’ positions, built on overlapping strengths in air-conditioning filtration (F24F) and separation processes (B01D), create high technical redundancy at the core and suggest that differentiation through adjacent branches or disruptive sensing and disinfection technologies will be the principal avenue for new entrants.
The most recent 18–24 months of filings are subject to publication lag and will appear under-counted until applications clear examination; the apparent step-down in 2024–2026 data should not be read as a structural acceleration of decline.
A 2020–2021 filing surge has receded; filtration and ventilation dominate the technology mix
The annual trend chart and IPC composition chart together reveal both the temporal arc of innovation activity and the structural weighting of technologies within standalone air purification.
Annual filing trend
Filings nearly tripled between 2019 and 2020, reaching a peak in 2021, most likely amplified by pandemic-driven demand and policy tailwinds for indoor air quality. Annual volume has since eased back toward pre-surge levels; figures for 2024–2026 are subject to publication lag and should be treated as floor estimates rather than definitive counts.
↗ Hover for values · click a bar to ask EurekaTechnology composition
Air conditioning and ventilation (F24F) and separation/filtration processes (B01D) are by far the dominant IPC classes, reflecting the core hardware of standalone purifiers. Sterilisation and disinfection (A61L) forms a meaningful secondary cluster, while catalysis (B01J), electrostatic separation (B03C), and vehicle HVAC (B60H) are materially smaller, pointing to relative sparsity in those branches.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Air Purification Apparatuses, Systems, and Methods…
Air filtration apparatuses, systems and methods for nitrous oxide and volatile organic compound (VOC) removal and non-VOC particle removal enable the removal of particulates, nitrous oxide-containing compounds, and volatile organic compounds from large volume enclosed environments. Systems incorporate HEPA filtration upstream from UV LED-assisted photo… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Air purification system | 344 |
| 2 | Air purifier with intelligent sensors and airflow | 311 |
| 3 | Air purifier | 293 |
| 4 | 空气净化结构和空气净化系统 | 280 |
| 5 | Air treatment system | 237 |
| 6 | Reactive bed plasma air purification | 231 |
| 7 | Air purification system and process | 225 |
| 8 | Air purifier | 215 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
Four structural dimensions — maturity, concentration, collaboration patterns, and geographic coverage — each carry distinct implications for where and how to deploy R&D resources in standalone air purification.
Post-peak field with selective opportunity pockets
The lifecycle stage is Decline, with annual filings easing back from the 2021 peak. This signals that broad, undifferentiated air-purifier filings carry diminishing incremental value. R&D bets are better placed in under-served adjacent branches — disinfection chemistry, electrostatic separation, or sensor-based control — where the density is lower and freedom to operate is wider.
Lifecycle: Post-PeakTight apex, meaningful challenger tier below
The top five filers hold 27% of the hundred largest filers’ combined output, but ranks six through twenty include diverse challengers — Blueair, Midea Group, Qingdao Haier, Koninklijke Philips, Seoul Viosys, and Carrier — spanning filtration specialists, Chinese home-appliance integrators, and lighting/UV players. A challenger can credibly close the gap by focusing on branches where the leaders are relatively thin.
Concentration: Moderate-HighIntra-group and university partnerships define the co-filing network
The most active co-filing pairs are Haier Smart Home with Qingdao Haier Air Conditioner (46 joint families) and Midea Group with Guangdong Midea Refrigeration Equipment (35 joint families), reflecting coordinated intra-group filing strategies rather than cross-industry alliances. LG Electronics co-files extensively with Chung Ang University (27 joint families), the most prominent industry–academia link in the corpus, suggesting a pipeline for early-stage disinfection and sensing research.
Collaboration: Intra-groupChina-dominant filings; US and Europe are secondary but strategic
China accounts for the overwhelming majority of patent records, with the United States and Europe (EPO) as secondary jurisdictions and South Korea and India also notable. WIPO (PCT) filings indicate applicants seeking broad international coverage. The geographic skew toward China reflects both the home offices of leading filers and the scale of domestic demand, but US and EPO coverage remains the key indicator of commercial intent in premium markets.
Geography: China-CentricGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Haier Smart Home Co Ltd | Qingdao Haier Air Conditioner General Corp Ltd | 46 |
| Midea Group Co Ltd | GD Midea Air Conditioning Equip Co Ltd | 35 |
| Haier Smart Home Co Ltd | Qingdao Haier Air Conditioning Electronics Co Ltd | 33 |
| Qingdao Haier Air Conditioner General Corp Ltd | Qingdao Haier Air Conditioning Electronics Co Ltd | 33 |
| LG Electronics Inc | Chung Ang University Industry Academic Cooperation Foundation | 27 |
| Haier Smart Home Co Ltd | Qingdao Haier Smart Tech R&D Co Ltd | 21 |
| LG Electronics Inc | CHUNGANG UNIV IND ACADEMIC COOP | 9 |
| Midea Group Co Ltd | GD Midea Environment Appliances Mfg | 9 |
| Midea Group Co Ltd | Guangdong Midea White Home Appliance Technology Innovation Center Co Ltd | 8 |
| Qingdao Haier Air Conditioner General Corp Ltd | Qingdao Haier Smart Tech R&D Co Ltd | 7 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
LG Electronics and Samsung Electronics lead with complementary technology emphases
The top two filers differ subtly in their technology weighting: LG Electronics leads in air-conditioning ventilation sub-classes while Samsung Electronics places relatively more emphasis on filtration separation processes, a distinction visible in their respective IPC distributions.
LG Electronics
LG Electronics holds the top position with 118 patent families, concentrated in air-conditioning ventilation (F24F 8: 91 families), filtration separation (B01D 46: 65 families), and ventilation hardware (F24F 13: 52 families). Its recent momentum has dropped sharply (▼ –99% vs prior period), suggesting the company has rotated filing activity elsewhere or is harvesting an existing position rather than building new volume.
families: 118Samsung Electronics
Samsung Electronics is effectively co-ranked at 111 patent families and stands out as the only top-tier player showing positive recent momentum (▲ +41% vs prior period). Its technology emphasis is led by filtration separation (B01D 46: 81 families), with a secondary position in air-conditioning ventilation (F24F 8: 63 families) — an inverse weighting relative to LG that may reflect a differentiated product strategy in high-efficiency filter technology.
families: 111| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| LG Electronics Inc | 1 | ▼ -99% |
| Gree Electric Appliance Inc of Zhuhai | 38 | ▼ -28% |
| Samsung Electronics Co Ltd | 24 | ▲ +41% |
| Sharp Corporation | 7 | ▼ -63% |
| Coway Co Ltd | 16 | ▼ -61% |
| Blueair | 8 | ▼ -89% |
| Koninklijke Philips NV | 1 | ▲ new entrant |
| Haier Smart Home Co Ltd | 31 | ▲ +15% |
Under-served branches adjacent to the dominant filtration and ventilation core
Several IPC branches appear at materially lower density relative to the dominant F24F and B01D clusters; they are observations of relative sparsity that warrant further technical and freedom-to-operate assessment before treating them as entry targets.
B03C · Electrostatic and magnetic separation
With 200 patent records, electrostatic precipitation and ionisation sit well below the filtration and ventilation core. As a contactless particle-removal mechanism that complements mechanical filters, this branch has plausible technical value for high-particulate and allergen-removal applications. The relatively sparse filing density suggests room for a focused IP position, though a thorough freedom-to-operate review against the existing 200 records is a necessary first step before committing R&D resources.
Search this in Eureka →B01J · Catalytic and photocatalytic air treatment
Chemical and physical processes including catalysis (B01J) account for 223 patent records — sparse relative to the dominant classes — despite growing commercial interest in photocatalytic and plasma-driven VOC degradation. The technical entry path involves integrating catalytic media with existing purifier airflow architectures, an area where the top incumbents have limited documented depth. The sparsity may reflect early-stage commercialisation rather than a fully saturated space, making it worth monitoring for cross-licensing or greenfield filing opportunities.
Search this in Eureka →How top applicants differ across technology routes
Route coverage across the main technology branches in the current evidence set.
| Player | F24F 8 · Air conditioning & ventilation | B01D 46 · Separation processes (filtration etc.) | F24F 13 · Air conditioning & ventilation | B01D 53 · Separation processes (filtration etc.) | F24F 11 · Air conditioning & ventilation |
|---|---|---|---|---|---|
| Gree Electric Appliance Inc of Zhuhai | Strong · 94 | Moderate · 28 | Strong · 65 | Absent | Strong · 58 |
| Samsung Electronics Co Ltd | Strong · 63 | Strong · 81 | Strong · 41 | Moderate · 20 | Moderate · 29 |
| LG Electronics Inc | Strong · 91 | Strong · 65 | Strong · 52 | Absent | Moderate · 25 |
| Coway Co Ltd | Strong · 47 | Strong · 69 | Strong · 37 | Absent | Emerging · 12 |
| Koninklijke Philips NV | Strong · 65 | Moderate · 25 | Absent | Moderate · 14 | Strong · 48 |
| Blueair | Strong · 85 | Absent | Moderate · 30 | Absent | Emerging · 14 |
| Haier Smart Home Co Ltd | Strong · 59 | Absent | Strong · 46 | Absent | Moderate · 16 |
Frequently asked questions
The corpus covers 6,313 patent families in standalone air purification on a global basis.
LG Electronics holds the top position with 118 patent families. Samsung Electronics and Gree Electric Appliance are effectively tied for second at 111 patent families each, making the gap between first and second very narrow.
Annual filings peaked in 2021. The field is in a post-peak phase, with annual volume easing back from that high. Recent-window data for 2024–2026 are subject to publication lag and represent floor estimates only.
China is by far the leading jurisdiction by patent-record count, followed by the United States and Europe (EPO). South Korea, India, and WIPO (PCT) are also notable filing destinations.
Among the top filers tracked in the momentum data, Samsung Electronics shows the strongest upward trend at +41% in recent filings versus the prior comparable period. Haier Smart Home also shows positive momentum at +15%, while most other top filers, including LG Electronics and Blueair, show declining recent filing rates.
The most active co-filing pairs are Haier Smart Home with Qingdao Haier Air Conditioner (46 joint families) and Midea Group with Guangdong Midea Refrigeration Equipment (35 joint families), both reflecting intra-group coordination. The most notable industry–academia collaboration is between LG Electronics and Chung Ang University, which have filed 27 joint families together.
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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.
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