Photobioreactor Mixing Control Patents: Leaders & White Space 2026
- 24.9% concentration at the top. The five most active assignees hold 64 of the 257 records in scope — a leader position without single-company dominance.
- Filing plateaued, not collapsed. From a 2020 peak of 18 filings, the 2021-to-2024 complete-year span shows a 10% pullback (10 to 9), not the steep drop the raw 2026 figure of 2 might suggest before publication lag catches up.
- Bioreactor hardware, not biology, carries the claims. C12M bioreactor-apparatus classifications cover 87.9% of the 257 records, far ahead of the 42.8% touching C12N microorganism claims — mixing hardware is the contested ground.
Filing growth compares 2021 (10 records) with 2024 (9) — 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 257 records in scope (CR5), not by the ranked leaders only.
What photobioreactor mixing control patents actually cover
Photobioreactor mixing control sits at the intersection of bioreactor engineering and algal cultivation: claims here describe how liquid medium is moved, how gas is dispersed, and how dead zones and shear rate are managed inside a closed or semi-closed vessel. The search scope combines mixing-specific terms — mixing time, power input, impeller speed, flow pattern — with the core bioreactor and microorganism IPC classes, so the 257 records in scope are filtered for mixing mechanics rather than general algae cultivation.
The record set spans filings published from 2015 through the 2026 data cut-off, with most-cited priority documents dating back to the mid-2000s flue-gas mitigation wave. That history matters: several of the most-cited records in this set predate the current filing window and continue to anchor citation counts even as the technical focus has shifted toward finer mixing control.
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Filing trend and technology composition
Two views of the same 257-record set: how filing activity has moved year over year, and which IPC subclasses carry the claims. Because a single record can carry several IPC classes, the composition shares add up to more than 100%.
Filing trend, 2017–2026
Filings rose to a peak of 18 in 2020, then eased. The complete-year comparison — 10 filings in 2021 against 9 in 2024, a 10% pullback — is the reliable read; 2025 and 2026 figures (2026 shows 2) are still filling in as publications lag filing by roughly 18 months.
Technology composition by IPC subclass
C12M bioreactor and enzyme-apparatus claims dominate at 87.9% of the 257 records, with C12N microorganism and genetic-engineering claims present in 42.8%. Horticulture (A01G, 22.6%), food-product end uses (A23L, 9.7%) and fermentation (C12P, 9.7%) show the field extends well past raw cultivation hardware into downstream processing and separation (B01D, 6.6%) and lipid extraction (C11B, 4.3%).
Shares are the percentage of the 257 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Photobioreactor Mixing Control with Eureka
This page is one run against one query. Ask Eureka your own question about photobioreactor mixing control and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art anchoring this field
WO2007011343A1 — Photobioreactor and process for biomass production and mitigation of pollutants in flue gases
Certain embodiments and aspects of the present invention relate to photobioreactor apparatus to contain a liquid medium comprising at least one species of photosynthetic organism therein, and to methods of using the photobioreactor apparatus as part of fuel generation system and/or a gas-treatment process or system able to at least partially remove certain undesirable pollutants from a gas stream.Filed by GreenFuel Technologies Corporation, published 2007-01-25 — a priority document that predates the current filing window but still frames flue-gas-linked photobioreactor claims.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20050239182A1 | Synthetic and biologically-derived products produced using biomass produced by photobioreactors configured fo… | 260 |
| 2 | US20050260553A1 | Photobioreactor and process for biomass production and mitigation of pollutants in flue gases | 255 |
| 3 | US20110092726A1 | System for cultivation and processing of microorganisms, processing of products therefrom, and processing in … | 232 |
| 4 | US20170341942A1 | Methods and systems for large scale carbon dioxide utilization from lake KIVU via a co2 industrial utilizatio… | 207 |
| 5 | US20090011492A1 | Photobioreactor Cell Culture Systems, Methods for Preconditioning Photosynthetic Organisms, and Cultures of P… | 167 |
| 6 | US5846816A | Apparatus for biomass production | 119 |
| 7 | WO2006020177A1 | Photobioreactor cell culture systems, methods for preconditioning photosynthetic organisms, and cultures of p… | 103 |
| 8 | WO2003094598A1 | Photobioreactor and process for biomass production and mitigation of pollutants in FLUE gases | 85 |
| 9 | US7824904B1 | Photobioreactors for production of algae and methods therefor | 71 |
| 10 | WO2007011343A1 | Photobioreactor and process for biomass production and mitigation of pollutants in FLUE gases | 69 |
Citation counts favour older filings inside any searched corpus — treat this table as a signal of influence on later filers, not of current commercial relevance.
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Browse MCP servers →What the filing pattern signals
Three read-throughs from the concentration, technology mix and citation data — useful for deciding where a freedom-to-operate search needs to go deeper.
Leadership without lock-up
The top five assignees combined hold 64 of the 257 records in scope — a real lead, but well short of the kind of single-company dominance that would force every new entrant through one gatekeeper's claims.
Hardware, not biology, is the contested layer
Bioreactor-apparatus classifications appear in 87.9% of records against 42.8% for microorganism and genetic-engineering claims. Mixing geometry, impeller design and flow-pattern control are where claim density actually sits.
Old flue-gas filings still anchor citations
The most-cited records in this set date to the mid-2000s and centre on flue-gas mitigation rather than mixing mechanics specifically. New filers should expect these to surface in any prior-art search regardless of how narrowly mixing control is claimed.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to photobioreactor mixing control, with the prior art for and against each one.
The assignee landscape
A ranked list of 100 companies drawn from the full 257-record dataset — not a top-100 or top-50 cut, but the complete ranking the data endpoint returns. Recent-year momentum across the named leaders shows little fresh activity, consistent with the field's post-2020 plateau.
One clear leader, no runaway gap
The top-ranked assignee holds 18 records against a fifth-place figure of 10 and a tenth-place figure of 9 — a gradual taper rather than a cliff, meaning the leadership position is contestable rather than entrenched.
Limited but real collaboration
Only nine co-assignee pairings appear across the dataset, with the strongest pairing reaching 11 shared records — evidence of a handful of durable research partnerships rather than a broadly networked field.
Named leaders show flat recent activity
Recent-year filing counts for the field's most active named assignees sit at zero or one record, with year-over-year change flat where any filing occurred at all. Momentum has shifted toward filers outside the historically dominant names.
| Assignee | Recent year | YoY |
|---|---|---|
| GreenFuel Technologies / GW Nutrition Corp | 1 | 0% |
| Nelson Mandela Metropolitan University | 0 | — |
| Iowa State University Research Foundation, Inc. | 0 | — |
| SKILL STEVEN | 0 | — |
| Heliae Development, LLC | 0 | — |
| Noblegen Inc. | 0 | — |
| Enviro Res | 0 | — |
| GreenFuel Technologies Corporation | 0 | — |
Where to take this analysis
The dataset points to specific next moves depending on whether the goal is freedom-to-operate, licensing, or new filing strategy.
Map claims inside the C12M cluster
With 87.9% of records touching bioreactor-apparatus classifications, a claim-level breakdown inside C12M is the highest-value next step before filing anything mixing-related.
Explore IPC claim breakdowns in EurekaTrack the co-filing partnerships
The nine identified co-assignee pairs, particularly the strongest one, suggest active research alliances worth monitoring for early signals of new filings.
Set up assignee alerts in EurekaWatch post-2024 publications as they land
Because publication lags filing by roughly 18 months, the 2025–2026 figures will keep revising upward; re-checking the trend in a future quarter will give a truer read on whether the plateau is holding.
Monitor filing trends in EurekaCommon questions on photobioreactor mixing control patents
The dataset ranks 100 assignees across 257 records, with the leading assignee holding 18 records — well ahead of the fifth-place figure of 10 and tenth-place figure of 9. That gradual taper means no single company controls the field outright: the top five combined hold 24.9% of all records, and the top ten hold 43.6%. A freedom-to-operate search should look beyond the single leader to the next several names in the ranking, since the gap between them is small.
Filings peaked at 18 in 2020 and have eased since; the most reliable complete-year comparison, 2021 (10 filings) against 2024 (9 filings), shows a 10% pullback rather than a collapse. Figures for 2025 and 2026 look lower still, but publication typically lags filing by roughly 18 months, so those recent years are undercounted and should not yet be read as a declining trend. A clearer picture will emerge once 2025 filings finish publishing.
Bioreactor and enzyme-apparatus claims under IPC class C12M appear in 87.9% of the 257 records, making hardware — impeller design, flow pattern, power input — the dominant claim category. Microorganism and genetic-engineering claims (C12N) appear in 42.8% of records, and horticulture-adjacent claims (A01G) in 22.6%. Because a single filing can carry multiple IPC classes, these shares overlap rather than sum to 100%, reflecting how mixing-control patents typically bundle apparatus claims with biological or downstream-processing claims.
WO2007011343A1, assigned to GreenFuel Technologies Corporation and published in January 2007, claims photobioreactor apparatus for containing a photosynthetic liquid medium and methods of using that apparatus in fuel-generation and flue-gas treatment systems. Its citation count (one of the highest most-cited records in this dataset) means it is likely to surface in prior-art searches for any flue-gas-linked photobioreactor design, but its claims are tied specifically to gas-treatment and fuel-generation use cases rather than mixing-control mechanics in isolation. A design that avoids flue-gas pollutant mitigation as a stated application, or that claims mixing control as a standalone apparatus improvement, has meaningful room to differentiate.
The technology composition data shows lower filing density in separation processes (B01D, 6.6% of records) and lipid/fatty-oil production (C11B, 4.3%) compared with the dominant C12M apparatus class. Sub-areas such as dead-zone detection sensing, shear-rate-adaptive impeller control, and closed-loop power-input optimisation show filings present but well below the density seen in core bioreactor-apparatus claims. These branches are worth a closer look for new filing strategy, since they sit adjacent to heavily claimed ground without being saturated themselves.
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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.