Plant Cell Culture Cell Retention Patents: Filing Trends and White Space
One assignee dominates. the leading filer holds 469 of the records in scope, while fifth place sits at just 2 and tenth place at 1 — a long tail behind a single very large filer. Volume rose to a peak of 61 in 2019, then eased to 29 by 2021 and 26 by 2024 — a -10% move over that three-year window. 2025 and 2026 counts are still filling in given the roughly 18-month lag between filing and publication, so the visible drop at the right edge of the chart should not be read as the technology going quiet.
- 1PIONEER HI BREED INTERNATIONAL INC469
- 2AGRIGENETICS INC43
- 3AMGEN INC8
- 4HER MAJESTY THE QUEEN IN RIGHT OF CANADA AS REPRESENTED BY THE MINISTER OF AGRICULTURE & AGRI FOOD7
- 5CANADIAN PATENTS & DEV LTD2
See the full plant cell culture cell retention 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 on plant cell culture cell retention?
One assignee accounts for the majority of the 533 records in scope, with 469 records against a fifth-place count of just 2 and a tenth-place count of 1. That gap means the field is not a multi-way race; it is one very large portfolio surrounded by a long tail of single- or double-filing entrants. Anyone evaluating freedom to operate should treat that leading portfolio as the primary blocker to clear, rather than assuming risk is spread evenly across many players.
Is patent filing in this area growing or shrinking?
Filing peaked at 61 records in 2019 and had settled to 26 by 2024, a -10% move from the 29 recorded in 2021. That is a real decline over that three-year window, not a sharp collapse. Counts for 2025 and 2026 look lower still, but publication typically lags filing by around 18 months, so those most recent years are undercounted in any dataset and should not be read as the field going quiet.
What does US20090280565A1 actually cover?
It describes a perfusion bioreactor design using sedimentation columns mounted inside the reactor to separate single cells and cell aggregates from the culture medium at very low shear stress, keeping the medium's upward flow at or just below the cells' sedimentation velocity. It is the most-cited record in this dataset, with a closely related WO filing close behind, indicating it shaped a meaningful share of later filings in this space. It is described as useful for plant, mammalian, insect and bacterial cell cultures, so its reach extends beyond plant-specific applications.
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 Plant Cell Culture Cell Retention 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.