Stormwater Treatment Device Patents: Who Leads, White Space 2026
Stormwater Treatment Device Patents: Filing Trends and White Space
One leader stands well clear of a long tail. the top assignee holds 23 records against a fifth-place count of just 3 and a tenth-place count of 1 across the 18 ranked companies. Filings rose from 5 in 2017 to a peak of 14 in 2023, then eased; the 2021-to-2024 comparison shows 0% growth, and 2026 is still a partial year, so the apparent drop at the end of the chart is a publication-lag artefact rather than a confirmed decline.
- 1CONTECH ENGINEERED SOLUTIONS LLC23
- 2STORMTRAP LLC20
- 3OLDCASTLE INFRASTRUCTURE INC6
- 4HYDROWORKS LLC3
- 5WDD ENG3
See the full stormwater quality treatment devices analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions on stormwater treatment device patents
Who holds the most patents on stormwater treatment devices?
One assignee leads the 18-company ranking with 23 records, well ahead of the fifth-place holder at 3 and the tenth-place holder at 1. That gap means a freedom-to-operate check in this field should start with the leader’s portfolio before looking at the rest of the field, since the remaining companies each hold comparatively narrow positions. The ranking covers only the assignees the dataset returns, not every company active in the space.
Is patent filing in stormwater treatment devices growing or slowing down?
Filings grew from 5 in 2017 to a peak of 14 in 2023, and the most recent complete comparison, 2021 to 2024, shows 0% growth. Later years in the chart show fewer records, but that is a publication-lag artefact — publication typically trails actual filing by around 18 months, so 2025 and 2026 data are still incomplete. Read the trend as a plateau after a 2023 peak, not as a confirmed decline.
What technology areas do these patents cover most?
The two dominant IPC subclasses are E03F, sewerage, covering 85.7% of the 63 records in scope, and B01D, separation processes such as filtration, covering 55.6%. C02F, water and wastewater treatment, appears in 31.7%. Because most devices combine a drainage-system claim with a separation mechanism, many records fall into more than one of these classes at once, which is why the shares add up to well over 100%.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Stormwater Quality Treatment Devices covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.