Hollow-Fiber Bioreactor Sterilization Patents: Who Holds the Ground
Concentrated at the top. The top 5 assignees hold 51.4% of all 109 records in scope, and the top 10 hold 79.8% — a small group of filers controls most of the documented claim space. Filings rose to a peak of 12 in 2021, then declined to 3 by 2024 (-75% over that span). 2025 and 2026 figures are partial due to publication lag and should not be read as a continued decline.
- 1ESTR BIOSYSTEMS GMBH17
- 2REPLIGEN CORP11
- 3EMD MILLIPORE CORP10
- 4UNIVERCELLS SA10
- 5TECH UNIV EINDHOVEN8
See the full hollow-fiber bioreactor sterilization 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
Who holds the most patents in hollow-fiber bioreactor sterilization?
The dataset ranks 38 companies across 109 records, with the leading assignee holding 17 records and a steep drop-off after that — fifth place holds 8 and tenth place holds 5. The top 5 assignees combined account for 51.4% of all 109 records, and the top 10 account for 79.8%, so most of the documented claim space sits with a small group rather than being spread evenly. Anyone assessing freedom to operate should start with that top tier before widening the search.
Is patent filing in this space growing or shrinking?
Filings rose to a peak of 12 in 2021 and fell to 3 by 2024, a -75% move over that three-year span, which is a genuine pullback in documented activity. However, publication typically lags filing by around 18 months, so 2025 and 2026 figures in this dataset are still incomplete and should not be read as confirming a continued decline. The fairest read is that activity cooled after 2021, with the true current trajectory not yet visible in published data.
What sterilization methods actually appear in these patents?
The search terms behind this dataset cover steam cycles, thermal mapping, sterile filters, condensate removal, biological indicators and sterile hold — the standard validated-sterilization toolkit for bioprocessing equipment. Nearly a quarter of the 109 records (24.8%) also carry a B01D filtration/separation IPC class alongside the core C12M bioreactor class, showing sterile-filter and condensate-removal claims are usually bundled into a reactor system claim rather than filed as standalone filtration patents. Smaller shares of records touch C12N cell-culture, A61F implant, B01L lab-apparatus and F04B pump classes, marking secondary integration points.
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 Hollow-Fiber Bioreactor Sterilization 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.