Ultrapure Water Fabs Patents: Top Companies & Filing Trends 2026
Ultrapure Water Production for Fabs: Patent Landscape 2026
17.4% concentration at the top. The five leading assignees together hold 752 of 4,322 records in scope, but the ranking runs 100 companies deep — this is a field with a long tail, not a duopoly. Filings rose from 156 in 2017 to a peak of 266 in 2021, then declined to 137 by 2024 — a 48% drop over that three-year span. Because publication trails filing by about 18 months, the 2025 and 2026 counts (down to 12 by the cut-off) understate actual recent filing and should not be read as a continuation of the decline.
- 1PROCTER & GAMBLE CO8.5%
- 2TORAY INDUSTRIES INC2.5%
- 3ORGANO CORP2.4%
- 4APPLIED MATERIALS INC2.0%
- 5ENCAPSYS LLC2.0%
See the full ultrapure water production for fabs 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 about this landscape
Who holds the most patents in ultrapure water production for fabs?
The assignee ranking covers 100 companies drawn from the 4,322 records in scope, with the leading assignee holding 367 records. The top five combined account for 17.4% of all records and the top ten for 24.2%, which means concentration exists at the very top but the great majority of filing activity is spread across a long tail of smaller filers. No single company or small group controls the field outright.
Is patent filing in this space growing or shrinking?
Filing volume rose from 156 records in 2017 to a peak of 266 in 2021, then declined to 137 by 2024 — a documented 48% drop over that three-year span. Counts for 2025 and 2026 appear much lower still, but that reflects the roughly 18-month lag between filing and publication rather than a continuing collapse in activity. The safest complete read of the trend currently ends at 2024.
What technologies dominate ultrapure water patent claims?
Water and wastewater treatment (C02F) is the most-tagged subclass at 20.2% of the 4,322 records, closely followed by medicinal preparations (A61K) at 19.2%, material analysis and testing (G01N) at 15.6%, and separation processes such as filtration (B01D) at 15.2%. Because a single record can carry multiple IPC classes, these shares add up to more than 100% and should be read as claim density per category rather than a breakdown of a whole.
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 Ultrapure Water Production for Fabs 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.