Ballast Water Treatment Patents: Who Leads, Where the Gaps Are 2026
- 75.5% concentration. The top 5 of 25 ranked assignees hold 71 of the 94 records in scope — filing here is dominated by a small group, not fragmented across many small filers.
- Filing peaked in 2017. 25 records published that year against a documented -100% swing from 2021 (5 records) to 2024 (0 records), though publication lag means 2025-26 figures are still filling in.
- C02F and B63J dominate composition. 77.7% of records touch water/wastewater treatment (C02F) and 43.6% touch ship auxiliaries (B63J) — the two classes most applicants must clear before filing anything new.
Filing growth compares 2021 (5 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. Top-5 share is the combined record count of the five largest assignees divided by all 94 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Ballast water commissioning and approval sits at the intersection of shipboard engineering and regulatory compliance: a treatment system has to pass a documented commissioning test and hold type approval before a vessel can discharge treated ballast water in port. The patent activity mapped here spans the treatment chemistry itself — ultraviolet dose control, electrochlorination, and filter backwash cycles — alongside the monitoring and sampling claims that prove a system met its required holding time and discharge limits.
The 94 records in scope run from 2015 through the 2026-07-31 data cut-off, spanning receiving offices in the United States, Europe, WIPO, Australia, Singapore and Canada. Because publication lags filing by roughly 18 months, the most recent one to two years understate real filing activity.
Filing trend and technology composition
Two views of the same 94 records: how filing activity has moved year over year, and which IPC subclasses the claims actually sit in.
Filing trend, 2017-2026
Filing peaked at 25 records in 2017 and has declined since; the documented three-year span from 2021 (5 records) to 2024 (0 records) shows a -100% swing. Treat 2025 and 2026 as incomplete rather than as confirmation the field has gone quiet.
IPC subclass composition
C02F (water and wastewater treatment) touches 77.7% of the 94 records and B63J (ship auxiliaries) touches 43.6%, confirming that most filings combine a treatment mechanism claim with a shipboard-integration claim. Electrolytic production (C25B, 19.1%) and separation processes (B01D, 8.5%) are narrower but still active bands. Because a single record can carry several classes, these shares sum to well over 100% of the record total and should not be added together.
Shares are the percentage of the 94 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Ballast Water Treatment Commissioning and Approval with Eureka
This page is one run against one query. Ask Eureka your own question about ballast water treatment commissioning and approval and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited prior art and a representative filing
US20220002172A1 — Ballast Water Management System
Techniques and systems for neutralizing discharge waters from ballast and/or cooling water biocidal treatment and disinfection systems are provided. The systems utilize, inter alia, oxidation reduction potential control to regulate the dechlorination of an electrocatalytically generated biocidal agent to allowable discharge levels in ship buoyancy systems and ship cooling water systems.Filed by Evoqua Water Technologies GmbH, published 2022-01-06 — illustrative of how ORP-based dechlorination control claims are drafted to sit alongside electrochlorination generation claims rather than replace them.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20080190826A1 | Ballast water treatment system | 98 |
| 2 | US20100116647A1 | Ballast water treatment plant having filter, disinfection, instrumentation and control unit | 82 |
| 3 | US9216376B2 | Systems and methods for exhaust gas cleaning and/or ballast water treatment | 41 |
| 4 | WO2017049052A1 | In-SITU delivery systems for reaction product abatement in electrochemical cells | 32 |
| 5 | WO2010022057A1 | Method and system for biofouling control of shipboard components | 22 |
| 6 | US20140060323A1 | Systems and methods for exhaust gas cleaning and/or ballast water treatment | 19 |
| 7 | WO2012128721A2 | Systems and methods for exhaust gas cleaning and/or ballast water treatment | 18 |
| 8 | US20110139729A1 | Method and System for Biofouling Control of Shipboard Components | 17 |
| 9 | US20130213899A1 | Systems and Methods for the Treatment of Ballast Water | 12 |
| 10 | WO2018102623A1 | Ballast water management system | 10 |
Citation counts favour older documents simply because they have had longer to accumulate citations inside a searched corpus — read them as a signal of influence on later filings, not as a ranking of current 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
Three patterns worth acting on before drafting a new application in this space.
Claim space is occupied by a small group
With 71 of 94 records held by the five leading assignees, a new entrant is not filing into open ground — it is filing around positions already staked out by a handful of established marine water-treatment specialists.
Recent filing activity has thinned
The leading assignees each show zero filings in the latest recorded year. Combined with the 2021-2024 decline, this suggests the core mechanisms are largely claimed and filers are consolidating rather than expanding volume.
Electrochlorination claims are a narrower band
Against C02F's 77.7% footprint, C25B's 19.1% marks electrochlorination-based generation as a smaller but distinct claim family, often paired with G05F control claims (9.6%) for dosing regulation.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to ballast water treatment commissioning and approval, with the prior art for and against each one.
Who holds the ranked positions
Twenty-five assignees make up the entire ranking returned for this dataset — this is not a top-50 or top-100 cut, it is the full list the search produced.
One filer holds well over a third of all records
The leading assignee's 35 records against a 94-record total shows a single company has treated ballast water commissioning as core patent territory for the better part of a decade, well ahead of the field.
A long tail files once or twice
Below the top ten, the ranking thins quickly to assignees with a handful of records each — typical of a field where a technology has matured enough that most new entrants file narrowly on a specific implementation rather than broad system claims.
No leading assignee filed in the most recent recorded year
Every one of the top assignees shows zero recorded filings in the latest year, consistent with the broader -100% 2021-2024 swing rather than any single company pulling back.
| Assignee | Recent year | YoY |
|---|---|---|
| Evoqua Water Technologies LLC | 0 | — |
| EVOQUA WATER TECHNOLOGIES LTD | 0 | — |
| BAWAT A/S | 0 | — |
| RWO GmbH | 0 | — |
| BALLAST WATER MONITORING | 0 | — |
| Siemens Water Technologies | 0 | — |
| Siemens AG | 0 | — |
| Sunrui Marine Environment Engineering Co., Ltd. | 0 | — |
Where to take this
The landscape narrows a search; the next step is testing a specific claim against the records that matter.
Check a draft claim against the leaders' positions
With 75.5% of records held by five assignees, a new UV-dose or electrochlorination claim needs a direct comparison against those specific filings before drafting proceeds.
Run a claim comparison in EurekaTrack the under-claimed branches
Sampling, backwash cycling and commissioning data logging show lower record counts than the core disinfection claims — worth monitoring for new entrants before committing R&D spend.
Set up monitoring in EurekaCommon questions on this landscape
One assignee leads the ranked field with 35 of the 94 records in scope, well ahead of the fifth-placed assignee's 7 records. The top five assignees combined hold 71 records, or 75.5% of everything in scope, which means the field is concentrated rather than fragmented. A new filer should assume any core disinfection or dosing mechanism has already been claimed by one of these five before drafting a similar application.
No — filing peaked in 2017 at 25 records and has declined since, with a documented -100% swing from 5 records in 2021 to 0 in 2024. However, publication typically lags actual filing by around 18 months, so 2025 and 2026 figures in this dataset are still incomplete and should not be read as confirmation the technology area is dead. The safer conclusion is that the core mechanisms are heavily claimed and remaining activity is consolidating around fewer players rather than expanding into new ground.
Water and wastewater treatment (IPC class C02F) appears in 77.7% of the 94 records, and ship auxiliaries (B63J) appears in 43.6%, meaning most filings combine a treatment mechanism with shipboard integration claims. Electrolytic production covering electrochlorination (C25B) sits at 19.1%, and filtration-related claims (B01D) sit lower at 8.5%. Because a record can carry multiple IPC classes, these percentages should be read individually against the 94-record total, not summed.
US20220002172A1, filed by Evoqua Water Technologies GmbH and published 2022-01-06, covers techniques for neutralizing discharge waters from ballast and cooling water biocidal treatment systems using oxidation reduction potential (ORP) control to regulate dechlorination of an electrocatalytically generated biocidal agent. In practical terms, it targets the back end of an electrochlorination system — the step that brings treated water down to allowable discharge levels rather than the generation step itself. Anyone designing a dechlorination control loop for a similar electrochlorination-based system should review its specific ORP control claims before finalising a design.
Based on the record counts across IPC subclasses, narrower bands like filter backwash cycle mechanics (within B01D's 8.5% share), in-line UV dose verification, and commissioning data logging tied to type approval show comparatively fewer records than core disinfection and electrochlorination claims. These are not confirmed gaps — they are areas with visibly lower filing density in this dataset that warrant a freedom-to-operate search before assuming they are open. A first claim in one of these branches would need to specify the sensing or logging mechanism precisely enough to sit clear of the dominant assignees' broader system claims.
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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.