Airlift Bioreactor Vessel Design Patents: Leaders & Filing Trends 2026
- 84.5% concentration. The top five assignees account for 60 of the 71 records in scope, leaving a thin tail of single- or double-filing entrants.
- Filing growth, not decline. Filings rose 2021 to 2024 by 200%, even though the raw count looks quiet after 2017 because publication lags filing by roughly 18 months.
- Claims lean outward from the vessel. Nearly half of records also carry a C12N microorganism class and over a quarter carry A01N or C05F, meaning most "vessel design" claims are anchored to a specific biological or agricultural application.
Filing growth compares 2021 (1 records) with 2024 (3) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 71 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Airlift bioreactor vessel design sits at the intersection of mechanical apparatus claims — aspect ratio, headspace volume, port layout, drainability, surface finish — and the biological or agricultural process the vessel is built to run. The search scope pulls 71 published records from 2015 through the mid-2026 data cut-off, filtered to documents that explicitly combine airlift or pneumatic bioreactor language with a named vessel-geometry term and sit inside the core C12M, B01F23/232 or C12M3/00 classification space.
Because publication trails filing by around 18 months, the most recent one to two years in any trend chart will always look thinner than the underlying filing activity actually was. Treat the tail as incomplete rather than as a real slowdown.
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Filing trends and technology composition
Two views of the same 71-record set: how filing activity has moved year over year, and which IPC subclasses the vessel-design claims are paired with.
Filing trend
Filings peaked in 2017 at 19 records. The 2021-to-2024 window shows genuine growth, rising from 1 to 3 filings, a 200% increase across that span. Years after 2024 should be read as still filling in rather than as a real drop-off.
Technology composition by IPC subclass
Every record in scope carries a C12M bioreactor class by construction. Beyond that base, 46.5% of the 71 records also carry C12N (microorganisms and genetic engineering), and 26.8% carry A01N (biocides/agrochemicals) or C05F (organic fertilisers) respectively, showing the vessel claims are usually written against a specific downstream biological process rather than as a bare mechanical apparatus.
Shares are the percentage of the 71 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Airlift Bioreactor Vessel Design with Eureka
This page is one run against one query. Ask Eureka your own question about airlift bioreactor vessel design and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records in this landscape
EP1498475A1 — Continuous plant cell bioreactor and method for continuous plant cell culture
The invention concerns a continuous plant cell bioreactor and a method for continuous plant cell culture. The vessel comprises a fermentation chamber, an oxygenating inlet enabling oxygenating fluid to enter the chamber, a cell media inlet enabling cell media to enter the chamber, and a plant cell supernatant outlet enabling cell supernatant to exit the chamber, with the cell media inlet and the supernatant outlet positioned substantially opposite each other. The method and apparatus are used to continuously produce recombinant therapeutic proteins from plant cell culture.Filed by Meristem Therapeutics S.A.; among the most-cited records in this scope at 50 citations.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20090011492A1 | Photobioreactor Cell Culture Systems, Methods for Preconditioning Photosynthetic Organisms, and Cultures of P… | 167 |
| 2 | US5906940A | Culturing cells on macroporous glass carriers coated with gelatin, extracellular matrix protein and stromal c… | 52 |
| 3 | EP1498475A1 | Continuous plant cell bioreactor and method for continuous plant cell culture | 50 |
| 4 | WO2007071072A1 | High-rate perfusion bioreactor | 34 |
| 5 | US20070037279A1 | Cell culture system | 23 |
| 6 | WO2017080987A2 | Process for improved fermentation of a microorganism | 16 |
| 7 | WO2005049785A1 | Cell culture system | 14 |
| 8 | WO2016162774A1 | Photobioreactors and methods for upscale production of biomasses | 13 |
| 9 | US8507253B2 | Photobioreactor cell culture systems, methods for preconditioning photosynthetic organisms, and cultures of p… | 12 |
| 10 | US20190218499A1 | Distributed systems for the efficient production and use of microbe-based compositions | 11 |
Citation counts favour older filings simply because they have had longer to accumulate citations inside the searched corpus; a high count signals influence on later drafting, not present-day commercial weight.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Three read-throughs of the concentration, growth and classification data above, framed around where a new filer would actually run into prior art.
The top of the field is dense, the rest is thin
Sixty of the 71 records in scope sit with five assignees, and the top ten combined reach 95.8%. A new entrant filing a bare vessel-geometry claim is filing directly into that dense zone; anything outside the top ten is effectively open ground by filing count alone.
Read the recent tail as incomplete, not falling
The raw yearly count drops sharply after the 2017 peak, but the 2021-to-2024 window on its own shows filings tripling. Because publication lags filing by roughly 18 months, 2025 and 2026 figures are not yet a fair comparison and should not be used to call the field in decline.
Vessel claims are rarely filed alone
Almost half of the records pair the bioreactor vessel class with a microorganism or genetic-engineering class, and roughly a quarter pair with agrochemical or fertiliser classes. A vessel-geometry claim written without tying it to a specific organism or output stream is the exception, not the rule, in this corpus.
Influence clusters on a handful of older filings
The most-cited records date well back in the window and their citation counts reflect years of accumulation inside the searched corpus, not current commercial relevance. Newer filings should be judged on claim scope and assignee activity, not on citation count alone.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to airlift bioreactor vessel design, with the prior art for and against each one.
Who is filing, and where the activity has gone quiet
The 20-company ranking is concentrated at the top, and recent-year momentum across the leaders has flattened to zero in the most current year tracked — consistent with the publication lag rather than a real stop in R&D.
A single leader well ahead of the field
The top-ranked assignee holds 19 of the 71 records in scope, roughly a quarter of the entire dataset on its own, well ahead of the fifth-place holder at 4 records.
A sharp drop after the leader
Filing counts fall quickly from the leader to fifth place, and continue falling to a single record by tenth place, which is the shape of a field with one dominant filer and a long tail of smaller or one-off entrants.
Recent-year activity reads as flat across every leader
Every one of the leading assignees shows zero filings in the latest tracked year, including a -100% year-on-year figure for one. Given the roughly 18-month publication lag, this is most plausibly an artefact of the data cut-off rather than a genuine stop in filing.
| Assignee | Recent year | YoY |
|---|---|---|
| Locus IP Co LLC | 0 | — |
| Nestec S.A. | 0 | — |
| Unibio A/S | 0 | — |
| Locus Solutions IPCO LLC | 0 | -100% |
| Societe des Produits Nestle S.A. | 0 | — |
| Algae Systems LLC | 0 | — |
| Grifols Technologies LLC | 0 | — |
| LLC | 0 | — |
Where to take this from here
The dataset points to a concentrated top and a thinner set of adjacent claim areas that have not been heavily filed.
Map a specific vessel-geometry claim against the leader's portfolio
With one assignee holding roughly a quarter of all records, any new aspect-ratio or port-layout claim should be checked against that portfolio first, not against the field average.
Run a claim comparison in Eureka →Track the 2024-2026 filings as they publish
Because of the publication lag, the real trajectory of filing activity since 2024 is still arriving. Revisit the trend chart on a quarterly basis rather than drawing conclusions from the current tail.
Set up a monitoring alert in Eureka →Test the under-claimed branches for a first-filer position
Headspace ratio control, continuous-perfusion port layout, and CIP/SIP drainability geometry show thinner coverage than the core vessel claims and may offer room for a first claim.
Explore white space in Eureka →Common questions on airlift bioreactor vessel design patents
One assignee leads the ranked field with 19 of the 71 records in scope, well ahead of the fifth-ranked holder at 4 records. The top five assignees combined account for 84.5% of all records, and the top ten reach 95.8%, so filing activity in this niche is heavily concentrated rather than spread evenly across many companies. Anyone assessing freedom to operate should look closely at that leader's claim scope before assuming open ground.
The raw yearly count looks like it peaked in 2017 and thinned out afterward, but that is misleading on its own. Looking specifically at 2021 to 2024, filings grew 200%, and because publication lags actual filing by roughly 18 months, the apparent drop in 2025 and 2026 mostly reflects records that have not published yet rather than a real pullback in R&D. Treat 2024 as the most recent year with a reasonably complete count.
In this dataset, 46.5% of the 71 records also carry a C12N class for microorganisms and genetic engineering, and 26.8% carry either A01N (biocides/agrochemicals) or C05F (organic fertilisers). B01F for mixing and stirring appears on 19.7% of records. Since a single record can carry several IPC codes, these shares do not need to add to 100%, and searching only C12M in isolation will miss a large share of relevant filings.
EP1498475A1 claims a continuous plant cell bioreactor with a fermentation chamber, an oxygenating inlet, a cell media inlet, and a supernatant outlet positioned substantially opposite the media inlet, used to continuously produce recombinant therapeutic proteins from plant cell culture. It is one of the most-cited records in this scope, with 50 citations, which signals it shaped a lot of later drafting rather than that it automatically blocks every new design. A design that does not rely on opposite-facing inlet/outlet geometry for continuous plant cell culture sits outside its specific claim language.
The classification data suggests thinner coverage in areas like headspace-to-working-volume ratio control, port layout built specifically for continuous perfusion, surface finish aimed at reducing cell adhesion, and drainability geometry suited to clean-in-place or steam-in-place cycles. These sit adjacent to the core vessel-geometry claims that dominate the top-filed portfolios, rather than duplicating them. Confirming white space still requires checking specific claim language against the leading assignees' filings, not just the classification counts.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.