Depth Filtration Patents: Who Leads, Where the Gaps Are 2026
Depth Filtration Continuous Clarification Patents: Who Holds the Estate
90.2% concentration. The top 5 of 16 ranked assignees hold 92 of the 102 records in scope — a field dominated by a handful of filers rather than a fragmented one. Filings ran from 7 in 2017 up to a peak of 10 in 2022, then eased to 2 by 2024 — a -50% move from 2021's 4 filings. 2025 and 2026 are still filling in under the publication lag and should not be read as a drop-off yet.
- 1AMGEN INC62
- 2REPLIGEN CORP13
- 3REGENERON PHARMACEUTICALS INC11
- 4ICHNOS SCIENCES SA4
- 5GRAVER CO2
See the full depth filtration continuous clarification 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 this landscape
Who holds the most patents in depth filtration continuous clarification?
One assignee holds 62 of the 102 records in scope, making it by far the largest portfolio in this dataset. The next four assignees together bring the top-five total to 92 records, or 90.2% of everything in scope. Below that, filing activity drops sharply across the remaining ranked entrants, so competitive analysis in this space should weight the leading portfolio heavily rather than treating filers as roughly equal.
Is the depth filtration patent field growing or shrinking?
Filing activity peaked at 10 records in 2022 and had fallen to 2 by 2024, a -50% change over that three-year span. Because patent 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 confirmation of a continued decline. The honest read is that the field cooled from its 2022 peak, with the most recent trajectory still unresolved.
What technology areas dominate depth filtration patent claims?
Bioreactor and cell-culture classes (C12M and C12N) appear in roughly 80% of the 102 records each, with fermentation-related C12P close behind at 71.6%. Classical separation-process classification (B01D), which covers filtration hardware directly, appears in only 25.5% of records. That pattern shows most claims are framed around the bioprocess harvest workflow — surge vessels, flow balancing, valve switching — rather than around filter media or membrane chemistry itself.
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 Depth Filtration Continuous Clarification 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.