Odor Control & VOC Abatement Patents: Top Companies & Trends 2026
- Filing has flattened, not grown. activity peaked at 10 families in 2023 after climbing from 4 in 2017, with the midpoint year 2022 already at 9 — a plateau, not a runway.
- The claim base sits on heat-transfer hardware, not chemistry. F23G (incinerators) and F27D (furnace details) dominate the IPC mix at 143 and 88 records, well ahead of B01D separation processes at 64.
- A tight cluster of assignees co-files repeatedly. three pairwise co-assignee links each appear 5 times among the same three organizations, pointing to a small, coordinated group controlling the regenerative thermal oxidizer core.
What this landscape covers
Odor control and VOC abatement patenting concentrates on hardware for destroying or capturing volatile organic compounds before they reach the atmosphere: regenerative thermal oxidizers, biofilters, and adsorption-regeneration systems. The search spans 187 patent families published between 2015 and mid-2026, filtered to records that combine odor-control or VOC-abatement claim language with technical detail on destruction efficiency, biofilter design, adsorption regeneration, energy consumption, or emission limits. The IPC footprint anchors this squarely in incinerator and furnace engineering (F23G, F27D) rather than pure chemical separation.
Because publication typically lags filing by around 18 months, the 2025-2026 counts in the trend chart understate real filing activity; treat the last one to two years as a floor, not a ceiling. Family counts, not raw document counts, are used throughout so that continuation filings and multi-jurisdiction refiling of the same invention do not inflate any single assignee's footprint.
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Filing trend and technology composition
Two views of the same 187-family dataset: how filing volume has moved year over year, and which IPC subclasses carry the claim weight.
A decade of flat-to-declining filing
Filings rose from 4 in 2017 to a peak of 10 in 2023, with 2022 already at 9 — the growth curve bent well before the most recent, publication-lag-affected years. This is a mature filing base rather than an emerging one.
Hardware, not chemistry, carries the claims
F23G (incinerators & waste burning) and F27D (furnace details) lead the IPC composition at 143 and 88 records respectively, with F23L (air supply) and B01D (separation) tied at 64. Valve (F16K, 48) and heat-exchange (F28D, 34) hardware round out the picture — this is a field where mechanical and thermal engineering claims dominate over sorbent chemistry.
Shares are the percentage of the 187 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Odor Control and VOC Abatement with Eureka
This page is one run against one query. Ask Eureka your own question about odor control and voc abatement and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art in this space
Regenerative thermal oxidizer, system comprising a regenerative thermal oxidizer and method of operating a regenerative thermal oxidizer
The disclosure covers a regenerative thermal oxidizer with at least two transfer chambers, each holding a bed, both connected to a shared reaction chamber. Waste gas is routed through either bed on the way to the reaction chamber, and an oxygen-containing gas inlet feeds the oxidation step. The structure lets the unit alternate which bed handles incoming waste gas while the other releases stored heat, improving thermal recovery across cycles.Filed by Koch Engineered Solutions GmbH, published 2023-09-28 as US20230304660A1.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6302188B1 | Multi-layer heat exchange bed containing structured media and randomly packed media | 64 |
| 2 | US6261092B1 | Switching valve | 60 |
| 3 | US5620668A | Annular air distributor for regenerative thermal oxidizers | 46 |
| 4 | US6322356B1 | Pollution abatement reactor system having nonprismatic structured media | 39 |
| 5 | US6087159A | Odor control system | 36 |
| 6 | US5240403A | Regenerative thermal oxidation apparatus and method | 35 |
| 7 | US20180154303A1 | Flow Balance Control in Volatile Organic Compound (VOC) Abatement Systems | 30 |
| 8 | US5833938A | Integrated VOC entrapment system for regenerative oxidation | 27 |
| 9 | US20010034056A1 | Odor control scrubber | 24 |
| 10 | US20040071589A1 | Odor control through air-facilitated injection of hydroxyl radicals | 23 |
Citation counts favor older filings simply because they have had longer to accumulate citations inside this corpus — read them as a signal of technical influence on later filers, 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
Four read-throughs from the trend, IPC mix, and citation data — useful for deciding where a new filing has room and where it does not.
The technology is filed-out at the top, not exhausted
A rise from 4 filings in 2017 to a peak of 10 in 2023, followed by a flat 2024-2026 window, indicates the core regenerative thermal oxidizer and biofilter architectures are well established. New entrants are more likely to find open ground in adjacent process integration than in the oxidizer core itself.
Thermal hardware outweighs sorbent chemistry two to one
F23G incinerator claims outnumber B01D separation-process claims by more than two to one. A filer with a genuinely new adsorption or biofiltration chemistry is competing against a much thinner prior-art base than one proposing another oxidizer bed configuration.
A small group controls the oxidizer core through repeated co-filing
The three strongest co-assignee pairs each recur five times among the same three organizations, a pattern consistent with joint-venture or supplier-integrator filing rather than independent invention. Anyone targeting the regenerative thermal oxidizer segment should expect to negotiate around this cluster's combined portfolio, not a single owner.
The most-cited art predates the current filing plateau
The highest-citation record in the set, on structured heat-exchange media, sits well before the 2022-2023 filing peak, meaning current filers are still building on a two-decade-old mechanical foundation rather than displacing it with new chemistry or control schemes.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to odor control and voc abatement, with the prior art for and against each one.
Who holds the ground, and where the gate sits
Assignee activity is concentrated among a handful of oxidizer and furnace-systems specialists, with recent-year momentum flat across the named leaders — none show fresh filings in the latest year, consistent with a maturing claim base.
Named leaders show no fresh activity in the most recent year
Every one of the top-ranked assignees by historical volume recorded zero filings in the latest year of the dataset. Combined with the overall flat trend, this points to a technology where incumbents are defending existing claims rather than actively extending them.
Joint filing is concentrated among the same three organizations
All three of the strongest co-assignee relationships in the dataset connect the same three organizations to one another, rather than spreading across a wider network. That is a tight supplier-integrator cluster, not a diffuse industry.
The US leads filing office volume, Europe and Canada close behind
The United States receives the most filings at 43, with Europe at 35 and Canada at 28. Australia (23) and the WIPO/PCT route (21) also carry meaningful volume, while China trails at 10 — a smaller Chinese footprint than the domestic-assignee names in the dataset might suggest, worth checking against national-phase timing.
| Assignee | Recent year | YoY |
|---|---|---|
| Megtec Systems | 0 | — |
| John Zink Company LLC | 0 | — |
| Focal Point Engineering Ltd. | 0 | — |
| NESTEC INC | 0 | — |
| W.R. Grace & Co. | 0 | — |
| BEDMINSTER BIOCONVERSION | 0 | — |
| Durr Systems | 0 | — |
| Babcock & Wilcox MEGTEC, LLC | 0 | — |
Where to take this from here
The dataset points to a mature oxidizer core and a thinner adsorption-chemistry and control-logic layer around it. Two directions follow from that.
Map freedom-to-operate around the co-filing cluster
Before committing to a regenerative thermal oxidizer or furnace-detail claim, run a focused clearance check against the three organizations behind the strongest co-assignee links — their combined portfolio is the densest obstacle in this set.
Run a freedom-to-operate check in EurekaStress-test a white-space claim before drafting
The under-claimed branches — adsorption-regeneration energy recovery, biofilter media cycling, emission-limit control logic — sit inside a thinner prior-art layer than the oxidizer core. Confirm that thinness holds against the full corpus, not just this filtered view, before drafting.
Explore white space in EurekaQuestions practitioners ask about this space
Filing activity in this dataset concentrates among a small group of regenerative thermal oxidizer and furnace-systems specialists that also co-file with one another repeatedly — three pairwise co-assignee links each recur five times among the same three organizations. That pattern suggests joint-venture or supplier-integrator filing rather than one dominant single owner. Anyone assessing competitive exposure should look at the cluster as a group, not rank one company against the rest in isolation.
Based on this dataset, filing rose from 4 families in 2017 to a peak of 10 in 2023, then flattened through the following years. Because publication lags filing by roughly 18 months, the very latest years in any such trend will always look lower than they eventually turn out to be, but even accounting for that lag, the growth curve had already bent before the most recent window. This reads as a maturing filing base rather than an emerging one.
Incinerator and furnace hardware dominate: F23G (incinerators and waste burning) accounts for 143 of the 187 records and F27D (furnace details) for 88, well ahead of B01D separation processes at 64. Valve components (F16K) and heat-exchange apparatus (F28D) also carry meaningful claim volume. This means the densest prior art sits in thermal-oxidation hardware, not in sorbent or biofilter chemistry.
US20230304660A1, filed by Koch Engineered Solutions GmbH and published 2023-09-28, claims a regenerative thermal oxidizer built from at least two transfer chambers, each holding a bed, both feeding a shared reaction chamber, with waste gas routable through either bed and an oxygen-containing gas inlet supporting the oxidation step. The value of the claim is the dual-bed switching architecture that lets the unit alternate which bed absorbs heat and which releases it. A design that avoids claiming this specific dual-chamber switching structure, or that uses a materially different bed-transfer mechanism, has a real path around it.
The clearest openings sit adjacent to the crowded oxidizer core: adsorption-regeneration energy recovery loops, biofilter media regeneration cycling, low-temperature catalytic VOC oxidation control, and emission-limit feedback control logic all sit within the same IPC footprint but carry thinner claim density than the F23G/F27D hardware core. These are good starting points for a novelty search, though each should be checked against the full corpus rather than this filtered view before drafting.
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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.