Syngas Fermentation Patents: Who Leads, Where the Gaps Are 2026
- One filer dominates. The leading assignee holds 316 of 907 records, and the top 5 combined account for 73.4% of all records in scope.
- Filing has cooled from its peak. 2017 was the high point at 106 filings; 2021 to 2024 (the last complete year) fell 29%, from 70 to 50.
- Claims cluster in fermentation and bioreactor classes. C12P covers 73.3% of records and C12M 39.6%, while gasification (C10J) and separation (B01D) each sit under 9%.
Filing growth compares 2021 (70 records) with 2024 (50) — 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 907 records in scope (CR5), not by the ranked leaders only.
What the syngas fermentation patent record shows
Syngas fermentation turns carbon monoxide, carbon dioxide and hydrogen into fuels, solvents and proteins using anaerobic microbes, and the patent record reflects a field built by a handful of process pioneers rather than a broad industrial base. 907 records published between 2015 and 2026 sit in scope, drawn from claims that combine gas fermentation with microbial culture conditions, gene constructs, or product stability language. The filing curve peaked in 2017 and has since declined, though the most recent years are still filling in as publications lag behind filing dates by roughly 18 months.
The composition of IPC classes points to where the actual engineering effort sits: fermentation and enzymatic synthesis (C12P) touches nearly three-quarters of records, bioreactor and apparatus claims (C12M) cover about two-fifths, and genetic engineering (C12N) a similar share. Gasification front-end technology and downstream separation are both claimed far less often, which is one of the clearer signals of where the patent activity has concentrated versus where it has not.
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Filing trend and technology composition
The trend and class charts below are built directly from the 907 records in scope, using the same denominators throughout: shares of filings are against the full record count, and class shares are against the record total, not against each other, since a single record can carry several IPC classes.
Filings by year, 2015–2026
Filings rose to a peak of 106 in 2017, then eased over the following years. The 2021-to-2024 span, the most recent period that can be read as complete, shows a 29% decline (70 to 50); years after 2024 are still incomplete because of publication lag and should not be read as a continued fall.
IPC subclass composition
C12P (fermentation and enzymatic synthesis) and C12M (bioreactors and enzyme apparatus) are the two largest classes by a wide margin, followed by C12N (microorganisms and genetic engineering). Electrolytic production (C25B), separation (B01D), gasification (C10J) and medicinal preparations (A61K) each cover under 9% of records, marking them as comparatively under-claimed relative to the core fermentation classes.
Shares are the percentage of the 907 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Syngas Fermentation Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about syngas fermentation patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
US10017789B2 — System and method for feedback control of gas supply for ethanol production via syngas fermentation using pH as a key control indicator
The patent describes a control system that combines process knowledge of syngas fermentation with standard instrumentation to stabilise gas supply, targeting high conversion of CO and H2 and high selectivity toward ethanol. An automatic feedback loop corrects operational imbalance to hold a continuous fermentation stable enough for commercial operation, and one embodiment uses the pH of the broth itself as the control variable for gas flow.Filed by The Board of Regents for Oklahoma State University, published 2018-07-10.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20080115415A1 | System and process for producing synthetic liquid hydrocarbon | 183 |
| 2 | WO2009094485A1 | Methods and organisms for utilizing synthesis gas or other gaseous carbon sources and methanol | 182 |
| 3 | WO2017165244A1 | Microorganisms and artificial ecosystems for the production of protein, food, and useful co-products from c1 … | 116 |
| 4 | US20090191593A1 | Methods and organisms for utilizing synthesis gas or other gaseous carbon sources and methanol | 102 |
| 5 | US20130005010A1 | Bioreactor for syngas fermentation | 85 |
| 6 | US20100227377A1 | Method for sustaining Microorganism culture in Syngas fermentation process in decreased concentration or abse… | 66 |
| 7 | US20130149755A1 | Use of oxyhydrogen microorganisms for non-photosynthetic carbon capture and conversion of inorganic and/or c1… | 65 |
| 8 | US20170218404A1 | Integrated fermentation and electrolysis process | 61 |
| 9 | US9976158B2 | Method and apparatus for syngas fermentation with high CO mass transfer coefficient | 51 |
| 10 | WO2008033812A2 | System and process for producing synthetic liquid hydrocarbon | 50 |
Citation counts favour older records that have had more time to accumulate references within the searched corpus; read them as a signal of influence on later filings, not as a measure of current commercial importance.
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 patterns in the dataset matter more than any single ranking: where filings concentrate by class, how fast the field is cooling, and where citation weight sits versus where recent activity sits.
The field is led by a small group, not a crowd
The top 5 assignees combined account for 73.4% of all 907 records in scope, and the top 10 reach 87.8%. A single leader holds 316 records on its own. New entrants are filing into a space where claim territory in the core fermentation and bioreactor classes is already heavily staked out by a small number of organisations.
Activity has cooled from its 2017 peak
Filings peaked at 106 in 2017 and, over the most recent span that can be treated as complete, fell 29% from 70 filings in 2021 to 50 in 2024. Years after 2024 will fill in further as publication catches up with filing, so the true current trajectory is better than the raw recent-year counts suggest.
Fermentation claims dominate; the front end is comparatively open
C12P (fermentation and enzymatic synthesis) appears in 73.3% of records and C12M (bioreactors) in 39.6%, while C10J (gasification of fuels) sits at just 6.9% and B01D (separation processes) at 8.6%. The imbalance suggests the syngas generation and downstream separation steps carry less claim density than the microbial conversion step itself.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to syngas fermentation patent landscape, with the prior art for and against each one.
Who holds the ground, and where it is thinning
The assignee ranking is dominated by one filer with a long tail of far smaller participants behind it, and recent-year momentum data shows even the largest holders pulling back on new filings.
A single organisation anchors the field
The leading assignee holds 316 of the 907 records in scope, well ahead of the fifth-ranked assignee at 33 and the tenth at 21. That gap defines the shape of the whole ranking: one dominant filer, a mid-tier of moderate filers, and a long tail of single- or few-filing entrants.
Even active filers are slowing
Recent-year momentum among the ranked leaders is negative across the board: several show year-over-year declines of 67 to 100%, including drops to zero new filings in the latest year. This is consistent with the broader 2021–2024 decline rather than a sign that any one company has exited the space outright.
Corporate affiliates file jointly more than competitors do
The strongest co-assignee links in the dataset connect affiliated entities of the same corporate groups rather than unrelated competitors, which is typical where a parent and a regional IP-holding subsidiary are named jointly on the same filings.
| Assignee | Recent year | YoY |
|---|---|---|
| Unilever Global IP Limited | 4 | -69% |
| Unilever IP Holdings BV | 4 | -67% |
| LanzaTech Inc | 0 | -100% |
| LanzaTech New Zealand Limited | 0 | — |
| LANZATECH NZ INC | 0 | — |
| Kiverdi Inc | 0 | -100% |
| INEOS Bio SA | 0 | — |
| Genomatica Inc | 0 | — |
Where to take this analysis
The dataset points to a field with occupied core claims and thinner coverage at the edges. The next step is deciding whether to file into the crowded centre, work the under-claimed branches, or map freedom-to-operate against the specific claims held by the leading assignees.
Map freedom-to-operate against the leading assignee's portfolio
With one organisation holding 316 of 907 records, any new filing in core fermentation or bioreactor control claims should be checked against that portfolio specifically, not just the field in aggregate.
Explore assignee portfolios in EurekaTest claim language in the under-claimed branches
Gasification integration, separation trains and electrolytic co-production all carry filing shares under 9% of records, well below the fermentation core, and may offer more open claim space for a first-to-file position.
Run a claim novelty check in EurekaCommon questions about syngas fermentation patents
The patent ranking is led by a single assignee holding 316 of the 907 records in scope, well ahead of the next-largest holders. The top 5 assignees combined account for 73.4% of all records, and the top 10 reach 87.8%, which makes this a field with a dominant leader and a long tail of smaller filers rather than a broadly distributed one. Anyone evaluating freedom to operate should check the leading assignee's claims first, since it covers the largest share of the occupied claim space.
Filing peaked in 2017 at 106 records and declined over subsequent years. Over the most recent span that can be treated as complete, 2021 to 2024, filings fell 29%, from 70 to 50. Figures for 2025 and 2026 are not yet reliable indicators of a continued decline because patent publication typically lags filing by around 18 months, so those later years will fill in as more records publish.
Based on IPC classification, the bulk of activity sits in fermentation and enzymatic synthesis (C12P, 73.3% of records) and bioreactor or apparatus design (C12M, 39.6%), with microorganism and genetic engineering claims (C12N) close behind at 37.2%. Gasification of the feed gas itself (C10J) and downstream separation (B01D) are both claimed in under 9% of records, indicating those process steps carry less patent density than the fermentation step.
US10017789B2, assigned to The Board of Regents for Oklahoma State University, covers a feedback control system for gas supply in ethanol production via syngas fermentation, including an embodiment that uses the broth's pH as the control variable for gas flow. It protects the specific control-loop method for stabilising CO and H2 conversion and ethanol selectivity, not syngas fermentation broadly. Someone designing a fermentation control system should review its claim scope closely if pH-based or feedback-loop gas control is part of their process.
The clearest under-claimed branches, judged by IPC share of the 907 records in scope, are gasification front-end integration (C10J, 6.9%), separation and purification trains (B01D, 8.6%), and electrolytic co-production routes (C25B, 8.9%). These sit well below the fermentation and bioreactor core, which together cover 73.3% and 39.6% of records respectively. That gap does not guarantee an easy grant, but it does suggest these process steps have drawn far less claim density than the microbial conversion step itself.
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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.