Pervaporation Membrane Patents: Top Companies & Trends 2026
Pervaporation Polymer Membrane Patents: Who Leads and Where the Field Is Still Open
24.7% concentration. The five most active filers account for 681 of 2,753 records in scope, a moderate concentration with a long tail below it. Filings rose from 76 in 2017 to a peak of 105 in 2023, then eased to 44 in 2024 (down 17% from 53 in 2021), with 2025-2026 still filling in as publications catch up to filing dates. The pattern reads as a maturing wave rather than an abrupt drop-off.
- 1UOP LLC8.7%
- 2EXXONMOBIL TECHNOLOGY & ENGINEERING CO5.7%
- 3KOGYO GIJUTSUIN4.2%
- 4NITTO DENKO CORP3.1%
- 5EI DU PONT DE NEMOURS & CO3.0%
See the full membranes & separation polymers — pervaporation polymer membranes patent landscape 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 pervaporation membrane patents
Who holds the most patents in pervaporation membrane technology?
One assignee leads the ranked field with 240 records, well ahead of the fifth-ranked filer at 83 and the tenth-ranked filer at 37. The top 5 assignees combined hold 681 of the 2,753 records in scope, or 24.7%, and the top 10 hold 924 records, or 33.6%. Below that point the ranking flattens into a long tail of smaller filers, so the field is led but not dominated by one or two companies.
Is pervaporation membrane patent filing growing or shrinking?
Filing rose from 76 in 2017 to a peak of 105 in 2023, then pulled back to 44 in 2024, a 17% decline from the 53 filed in 2021. Because publication lags filing by roughly 18 months, the 2025 and 2026 figures in any trend chart are still incomplete and should not be read as a continuing decline. The honest read through the last complete year is a cooling off a 2023 peak, not a collapsing field.
What technology areas dominate pervaporation membrane patent claims?
Separation-process claims under IPC class B01D appear on 72.8% of all 2,753 records, making it by far the dominant class. C07C compound chemistry is the only other class above 20%, at 21.5%. Water treatment, polymer processing, hydrocarbon refining, condensation polymer chemistry, fermentation and inorganic compounds each sit in the mid-single digits, which suggests most competitive differentiation happens within B01D claim drafting rather than by moving the invention into a different technical class entirely.
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 Membranes & Separation Polymers — Pervaporation Polymer Membranes Patent Landscape 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.