Depth Filtration Filter Sizing Patents: Who Leads, Where the Gaps Are 2026
Depth Filtration Filter Sizing Patents: Mapping Leaders and Open Claim Space
54.5% of all 112 records sit with just five assignees, and 81.3% sit with ten — this field is concentrated at the top with a long tail of single-filing entrants below tenth place. Filings climbed to a peak of 10 in 2023 before falling to 1 in 2024, a -86% move from the 7 filed in 2021. Do not read 2025 and 2026 as continuing that decline: at this dataset's cut-off, publication has not caught up with filing for those years.
- 1BASF CORPORATON19
- 2ALCAN INTERNATIONAL LTD11
- 3REGENERON PHARMACEUTICALS INC11
- 4EMD MILLIPORE CORP10
- 53M INNOVATIVE PROPERTIES CO10
See the full depth filtration filter sizing 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 are the leading patent holders in depth filtration filter sizing?
The dataset ranks 57 companies, but activity is heavily concentrated: the top 5 assignees hold 54.5% of all 112 records in scope, and the top 10 hold 81.3%. The leading assignee alone accounts for 19 records, well ahead of the fifth-place holder at 10. Beyond the top 10, most of the remaining 47 ranked companies hold only a handful of records each, forming a long tail rather than a second tier of comparable size.
Is patent filing activity in depth filtration filter sizing growing or shrinking?
Filings dropped from 7 in 2021 to 1 in 2024, a decline of 86% over that span, with a peak of 10 records in 2023 in between. That 2024 figure is the most recent year the dataset can treat as complete, because publication typically lags filing by around 18 months. The apparent thinning in 2025 and 2026 should not be read as a continuing decline — it is largely an artefact of that lag, not confirmed shrinking activity.
What patent classes cover depth filtration filter sizing technology?
B01D, covering separation processes including filtration, appears on 84.8% of the 112 records and is by far the dominant class. Bioprocess-related classes appear at lower but still notable rates: C07K (peptides and proteins) at 28.6%, C12N (microorganisms and genetic engineering) at 19.6%, C12M (bioreactors) at 17.9%, and C12P (fermentation) at 15.2%. Because a single record can carry several IPC classes, these percentages add up to more than 100% and should not be summed.
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 Filter Sizing 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.