Advanced Oxidation Potable Reuse Patents: Leaders & Filing Trends 2026
Filing growth compares 2021 (5 records) with 2024 (26) — 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 219 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape tracks 219 published records at the intersection of advanced oxidation processes and potable water reuse, spanning UV/peroxide, ozone-based and electrolytic treatment routes combined with membrane and separation steps. The search string pairs oxidation-specific terms with desalination, reuse and membrane-treatment language, so records here describe systems built to remove organic contaminants, pharmaceuticals and other trace compounds ahead of reuse, not general water treatment. Publication lags filing by roughly 18 months, so the most recent years in the trend understate real filing activity.
Filing offices split across the United States, WIPO's PCT route, Europe, India, Australia and Israel, reflecting a field where treatment systems are commercialised across multiple regulatory jurisdictions rather than filed once and left domestic. The assignee base ranges from a small set of concentrated leaders to a long tail of single- or few-filing entrants, typical of a technology area still being actively defined rather than consolidated.
Filing trends and technology composition
Two views of the same 219 records: how filing activity has moved year over year, and which IPC subclasses the claims actually sit in.
Filing trend, 2017–2026
Filings rose from 6 in 2017 to a peak of 26 in 2024, including a 420% jump from 2021 (5 records) to 2024 (26 records). 2025 and 2026 figures are still incomplete because of publication lag and should not be read as a slowdown.
IPC subclass distribution
C02F (water and wastewater treatment) appears in 88.6% of the 219 records, with B01D (separation processes) close behind at 45.7%. Electrolytic production (C25B) at 9.6% and catalysis (B01J) at 5.9% mark smaller but distinct technical routes; classes overlap within records, so shares sum above 100%.
Shares are the percentage of the 219 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Desalination & Water Reuse — Advanced Oxidation for Potable Reuse Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about desalination & water reuse — advanced oxidation for potable reuse patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative filing and most-cited prior art
WO2023075676A1 — Integrated advanced concurrent oxidation, catalytic reaction and membrane filtration system
The filing combines an oxygen-concentration unit, an ozone generator producing 140 mg/L or more of ozone, and a quick reaction unit that infuses microbubbles and nanobubbles of ozone into wastewater ahead of membrane filtration, targeting industrial wastewater treatment.Filed by Nanosun Pte. Ltd., published 2023-05-04.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20070125719A1 | System and method of reducing organic contaminants in feed water | 67 |
| 2 | US20120267308A1 | Recovery of retrograde soluble solute for forward osmosis water treatment | 48 |
| 3 | US20110186495A1 | Apparatus, systems, and methods for water treatment | 48 |
| 4 | US20110247985A1 | Hybrid chemical/mechanical method and apparatus for inactivating and removing pharmaceuticals and other conta… | 44 |
| 5 | US20190127253A1 | Method and device for treating water condensed from water vapor contained in the air, and related method and … | 35 |
| 6 | WO2014039929A1 | Systems and methods for generation of reactive oxygen species and applications thereof | 31 |
| 7 | US20170107128A1 | System and method for generation of reactive oxygen species and applications thereof | 31 |
| 8 | US20160340202A1 | Point-of-use water treatment system | 29 |
| 9 | WO2016094835A1 | A membrane and gas recycling system for forward osmosis water treatment systems using switchable polar solven… | 28 |
| 10 | WO2013100262A1 | Method for treating water containing organics | 27 |
Citation counts favour older records simply because they have had more time to be cited; treat them as a signal of influence within this corpus, not of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns worth acting on before drafting claims in this space.
The top of the field is concentrated, but not locked
Five assignees hold 85 of the 219 records in scope, a 38.8% share. That leaves 61.2% spread across a long tail of the remaining 86 ranked companies, several with just one or two filings — a sign claim space is occupied at the centre but still open at the edges.
Filing activity accelerated sharply into 2024
Annual filings moved from 5 in 2021 to 26 in 2024, the peak year in the dataset. That growth curve suggests the field moved from early exploration to active claim-staking within a three-year window, well before 2025 filings have fully published.
Electrolytic oxidation is a smaller, distinct route
While C02F and B01D cover the bulk of filings, C25B electrolytic production of compounds sits at just 9.6% of records — a narrower branch worth watching separately from the dominant membrane and chemical-oxidation claims.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to desalination & water reuse — advanced oxidation for potable reuse patent landscape, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Carollo Engineers Inc | JUBY GRAHAM JOHN GIBSON | 3 |
| Carollo Engineers Inc | GRAHAM JOHN GIBSON JUBY | 2 |
| Trevi Systems Inc | WEBLEY JOHN WILFRED | 1 |
| Trevi Systems Inc | SITKIEWITZ STEVE | 1 |
| Trevi Systems Inc | CARMIGNANI GARY | 1 |
Only 5 co-assignee pairs appear across the dataset, the strongest linking an engineering firm with a named inventor across three records — collaboration is the exception here, not the norm.
Where to take this analysis
The landscape points to where claim space is dense and where it is thin — the next step is testing a specific filing or design-around against it.
Check freedom-to-operate against the leader's portfolio
With one assignee holding 43 of 219 records, any new filing in the core oxidation-membrane space should be checked against that portfolio specifically before drafting claims.
Run a claim comparison in EurekaExplore the under-claimed branches
Electrolytic oxidation and catalytic PFAS routes carry far fewer filings than the dominant membrane-treatment claims, leaving room for a first-mover filing.
Explore white space in EurekaCommon questions on this landscape
One assignee leads the field with 43 of the 219 records in scope, a clear margin over the fifth-ranked holder at 8 and tenth-ranked at 6. The top 5 assignees combined hold 38.8% of all records, while the remaining share is spread across a long tail of 91 ranked companies, many with only one or two filings. This pattern points to a genuine leader surrounded by a fragmented field rather than a small cartel of equally sized players.
Filings grew sharply, moving from 5 records in 2021 to a peak of 26 in 2024, a 420% increase over that three-year span. The years 2025 and 2026 show lower counts, but that reflects publication lag of roughly 18 months rather than an actual drop in filing activity. Treat 2024 as the most recent complete year when judging momentum.
C02F, covering water and wastewater treatment, appears in 88.6% of the 219 records, making it the dominant classification by a wide margin. B01D, separation processes including filtration, follows at 45.7%. Smaller but distinct branches include C25B electrolytic production at 9.6% and B01J catalysis at 5.9%, each representing a narrower technical route worth tracking separately from the dominant membrane and chemical-oxidation claims.
Branches such as electrolytic oxidation for trace pharmaceutical removal, ozone microbubble dosing control, and catalytic advanced oxidation for PFAS-class contaminants carry comparatively few filings relative to the dominant C02F and B01D claims. These narrower branches sit alongside a heavily filed core, meaning a well-drafted claim there faces less prior art density. Any filing strategy should still be checked against the leading assignee's broader portfolio for overlap.
The United States receives the most filings at 61, followed by the WIPO PCT route at 34 filings and the European Patent Office at 23. India, Australia and Israel each appear in double digits, reflecting a filing strategy built around multi-jurisdiction commercialisation rather than a single home market. This spread matters for freedom-to-operate checks, since a clearance search limited to one office would miss a large share of relevant prior art.
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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.