Fischer-Tropsch Separation Patents: Leaders & White Space 2026
- Filing has cooled from its 2022 peak. 128 families in 2022 versus 66 in 2017 and just 7 so far in the most recent (partial) year — a plateau, not a growth curve.
- Refining IPC classes dominate over separation-specific ones. C10G and C07C together outweigh B01D more than tenfold, meaning most claim activity sits in upgrading chemistry, not in the mechanical separation step itself.
- The largest oil majors have gone quiet in the latest year. Assignees including ExxonMobil, Shell, Chevron and BP each show zero filings and negative year-on-year momentum in the most recent period on record.
Filing growth compares 2021 (112 records) with 2024 (84) — 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 2,835 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Fischer-Tropsch synthesis converts synthesis gas into a mixture of hydrocarbons that must then be separated into wax, syncrude and lighter fractions before it can be upgraded into fuels or chemicals. This landscape tracks patent families filed against that separation and downstream upgrading step — wax hydrocracking, syncrude upgrading, and catalyst/product separation — rather than the synthesis reaction alone. The dataset spans 2,835 patent families published between 2015 and mid-2026.
Filing office data shows the United States as the single largest receiving office, with Europe, the PCT route and Australia, Canada and India following at meaningfully lower volumes. That distribution points to a field still anchored in a handful of jurisdictions with established gas-to-liquids or oil-sands infrastructure, rather than one diffusing broadly across emerging markets.
Filing trends and technology composition
Two views of the same 2,835-family dataset: how filing volume has moved year over year, and where those filings sit across the IPC classification system.
A peak already behind it
Annual filings rose from 66 in 2017 to a peak of 128 in 2022, then declined. The most recent year shows only 7 filings, but publication typically lags actual filing by around 18 months, so the last one to two years understate real activity. Even allowing for that lag, the shape is a plateau followed by a pullback rather than sustained growth.
Refining chemistry outweighs mechanical separation
C10G (hydrocarbon oils and refining) and C07C (acyclic and carbocyclic compounds) each carry far more records than B01D, the subclass most associated with physical separation equipment such as filtration. B01J, covering catalytic processes, sits in between. That pattern indicates claim activity concentrates on what happens to the hydrocarbon stream chemically — hydrocracking, upgrading, gasification — more than on the separation hardware itself.
Shares are the percentage of the 2,835 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Fischer-Tropsch Synthesis Separation Process with Eureka
This page is one run against one query. Ask Eureka your own question about fischer-tropsch synthesis separation process and every answer comes back with the patent numbers behind it.
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Method and Apparatus for the Continuous Separation and Discharge of Solid Catalysts and Products for Fischer-Tropsch Synthesis Reactions
Filed by Korea Research Institute of Chemical Technology, this record describes a continuous separation and discharge apparatus for solid catalysts and liquid products from Fischer-Tropsch synthesis. It targets the slurry reactor problem directly: separating wax-phase long-chain hydrocarbons from solid catalyst particles using periodic pulses of feed gas, then discharging product through a lower outlet without interrupting the reaction.Filed 2011-02-03 · US20110028574A1
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4247486A | Cyclic hydroformylation process | 510 |
| 2 | US6114400A | Synthesis gas production by mixed conducting membranes with integrated conversion into liquid products | 284 |
| 3 | US20140227548A1 | Nanoparticles, Compositions, Manufacture and Applications | 267 |
| 4 | US20080174115A1 | Power systems utilizing the heat of produced formation fluid | 258 |
| 5 | US7635023B2 | Time sequenced heating of multiple layers in a hydrocarbon containing formation | 231 |
| 6 | US7549470B2 | Solution mining and heating by oxidation for treating hydrocarbon containing formations | 230 |
| 7 | US6306917B1 | Processes for the production of hydrocarbons, power and carbon dioxide from carbon-containing materials | 220 |
| 8 | US7533719B2 | Wellhead with non-ferromagnetic materials | 219 |
| 9 | US7584789B2 | Methods of cracking a crude product to produce additional crude products | 210 |
| 10 | US20070131428A1 | Methods of filtering a liquid stream produced from an in situ heat treatment process | 210 |
Citation counts favour older filings simply because they have had more time to be cited; treat this as a measure of influence on later filings, not of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the data implies for a filing decision
Three read-outs from the trend, classification and citation data that matter more for strategy than the raw counts do.
Momentum has broken, not merely slowed
The climb from 66 filings in 2017 to a 2022 peak of 128 was followed by a clear pullback. Combined with the momentum data showing major assignees at zero filings and negative year-on-year change, this reads as a maturing claim space rather than one in the middle of a filing wave.
Separation hardware is the smaller slice
C10G refining-oriented records outnumber B01D separation-equipment records by more than seven to one. Most of the claim density sits in what is done to the hydrocarbon stream — hydrocracking, gasification, catalytic upgrading — leaving the physical separation step comparatively less crowded.
Activity concentrates in a handful of offices
The United States accounts for the largest share of receiving-office filings, with Europe and the PCT route next. Canada, Australia and India each hold a meaningfully smaller share, consistent with a technology tied closely to specific gas-to-liquids and oil-sands operating regions.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to fischer-tropsch synthesis separation process, with the prior art for and against each one.
Who has filed, and who has stopped
The assignee set is dominated by integrated oil and gas companies, several of which show no filings at all in the most recent year on record — a signal worth weighing against their historical share.
Major filers have gone quiet
ExxonMobil's engineering entity, Shell's research arm and BP's exploration and operations unit each show zero filings in the latest year with year-on-year change reported at -100%. Chevron USA and Fulcrum BioEnergy show the same zero-filing pattern for the latest period.
Co-assignment is limited but concentrated
Only ten co-assignee pairs appear across the dataset. The strongest pairing links BP's exploration and operations unit with Johnson Matthey Davy Technologies at 23 shared families, well ahead of the next-strongest ExxonMobil-linked pairs.
Influence sits with older, broader filings
The most-cited record in this corpus is a cyclic hydroformylation process patent from 1980, cited 510 times. Its dominance illustrates how citation counts in a mature corpus skew toward foundational, decades-old filings rather than recent activity.
| Assignee | Recent year | YoY |
|---|---|---|
| ExxonMobil Research and Engineering Company | 0 | -100% |
| Chevron U.S.A. Inc. | 0 | — |
| FULCRUM BIOENERGY INC | 0 | — |
| Shell International Research Maatschappij B.V. | 0 | -100% |
| ExxonMobil Chemical Patents Inc. | 0 | — |
| BP Exploration Operating Company Limited | 0 | — |
| Shell Oil Company | 0 | — |
| ConocoPhillips Company | 0 | — |
Where to take this analysis
The filing and classification data point to a field with occupied core claims and a thinner layer of separation-specific mechanical claims still open.
Map the separation-equipment sub-space directly
B01D records are a small fraction of the total. A focused search restricted to that subclass, cross-referenced against the wax-catalyst discharge mechanisms named above, would show whether mechanical separation claims are genuinely open or simply under-indexed here.
Explore separation claims in EurekaTrack assignee momentum before committing to a filing strategy
Several major historical filers show zero activity and negative year-on-year change in the latest period. Confirming whether that reflects publication lag or an actual strategic pullback changes how much freedom-to-operate risk remains in their core claims.
Check assignee momentum in EurekaCommon questions on this landscape
In this dataset, it means a patent family whose title, abstract or claims combine Fischer-Tropsch synthesis terminology with product separation, wax hydrocracking or syncrude upgrading language. That excludes patents describing only the syngas-to-hydrocarbon reaction step with no downstream separation or upgrading claim. Most records also carry IPC codes in C10G, C07C or B01J, reflecting that separation is usually claimed alongside refining or catalytic chemistry rather than as a standalone mechanical step.
Annual filings rose from 66 in 2017 to a peak of 128 in 2022, then declined toward the most recent year. Part of that decline is a publication artifact: patent filings typically take about 18 months to publish, so the last one to two years in any dataset understate true filing activity. Even accounting for that lag, several of the largest historical assignees show zero filings and negative year-on-year momentum, suggesting the pullback is at least partly real and not only a reporting delay.
The assignee base is dominated by integrated oil, gas and refining companies with long-standing Fischer-Tropsch or gas-to-liquids programmes. Several of the largest historical filers, however, show no filings at all in the most recent year on record, with reported year-on-year change of -100% at multiple major assignees. That combination — high cumulative share but recent inactivity — matters more for freedom-to-operate analysis than raw filing counts alone.
The classification data shows separation-specific claims, largely under B01D, make up a small fraction of the corpus compared to refining-oriented C10G and organic-chemistry C07C records. That does not mean separation hardware is unpatentable; it means fewer patents claim it directly, which can indicate either genuine white space or that separation is usually bundled into broader process claims. A targeted search restricted to B01D combined with catalyst-discharge or slurry-handling language is the way to test which explanation holds.
That patent, filed by Korea Research Institute of Chemical Technology, claims a continuous separation and discharge apparatus and method for solid catalysts and liquid products in Fischer-Tropsch slurry reactors, using periodic feed-gas pulses to separate wax-phase product from catalyst particles and discharge it through a lower outlet. It is most relevant to anyone designing continuous catalyst-product separation for slurry-bed Fischer-Tropsch reactors rather than fixed-bed or fluidised-bed configurations. Designing around it generally means using a different separation trigger mechanism — pressure differential, gravity settling stages, or membrane-based separation — instead of periodic gas-pulse discharge.
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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.