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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/pre-combustion-and-oxy-fuel-capture-patent-landscape-patent-landscape/ · Patsnap · data cut-off 2026-08-31 · downloaded from the live page
Carbon Capture, Utilization & StoragePre-Combustion & Oxy-Fuel Capture Patents: Who Holds the Claims
- One assignee holds 15 of 59 records while a long tail of single- and double-filing entrants fills out the remaining ranked field of 18 companies.
- Filings fell 94% from 2021's peak of 17 to just 1 in 2024 the sharpest pullback in the dataset's decade of coverage, though 2025-26 figures are still filling in under normal publication lag.
- Gas-turbine and steam-cycle classes sit alongside sorbent chemistry F02C and F01K together cover roughly a third of records, showing this is as much a power-plant integration problem as a materials one.
59
Published Records
69%
Top-5 Share of All Records
-94%
Filing Growth 2021→2024
EP
Leading Jurisdiction
Filing growth compares 2021 (17 records) with 2024 (1) — 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 59 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··6 min readSourced from Patsnap Eureka
Overview
What this landscape covers
This landscape maps 59 published records matching pre-combustion and oxy-fuel carbon capture terms — carbon dioxide stream separation, sorbent regeneration, capture efficiency and related gas-separation claims — filed or published between 2015 and the 2026 data cut-off. The scope favours documents that tie capture chemistry to plant-level integration: turbine cycles, steam cycles and sorbent materials all appear as claimed elements rather than being treated as separate fields.
Because publication lags filing by roughly 18 months, the most recent one to two years in any trend understate actual filing activity. 2024 is the last year in this dataset that can be read as materially complete; 2025 and 2026 are still filling in.
Filing activity and technology mix, 2015-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Pre-Combustion & Oxy-Fuel Capture Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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The data
Filing trend and technology composition
Two views of the same 59 records: how filing activity moved year over year, and which IPC subclasses the claims actually sit in.
A sharp peak, then a steep pullback
Filings rose to a peak of 17 in 2021 before falling to 1 in 2024, a 94% drop over that three-year span. Read this as a contraction in new filing activity following the peak, not as a signal that the technology itself has stalled — plant deployment and licensing activity can continue well after the filing curve turns down.
Inorganic chemistry and separation dominate, but power-cycle classes are close behind
C01B (non-metallic elements and inorganic compounds) appears in 52.5% of the 59 records, ahead of B01D separation processes at 35.6% and F02C gas-turbine plants at 33.9%. Because records carry multiple IPC classes, these shares add up to more than 100% — the takeaway is that most claims combine a chemistry class with a plant-integration class rather than sitting in either alone.
Shares are the percentage of the 59 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Pre-Combustion & Oxy-Fuel Capture Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.
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The most-cited records in this field
Representative record
Organosilica membranes, methods of making same, and uses thereof
THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORK
Provided are composite articles having a membrane and a porous substrate, where the porous substrate has the membrane disposed thereon. The membrane has two layers, each built from polymer chains with defined silicon-oxygen and silicon-carbon ratios, with the second layer at least partially crosslinked to the first.Filed by The Research Foundation for the State University of New York; published 2023-02-23.
Highest-cited documents in scope
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US7752848B2 | System and method for co-production of hydrogen and electrical energy | 103 |
| 2 | US20050210881A1 | System and method for co-production of hydrogen and electrical energy | 63 |
| 3 | EP1582502A1 | System and method for co-production of hydrogen and electrical energy | 37 |
| 4 | US20200363108A1 | Refrigeration Cycles With Liquid-Liquid Phase Transitions | 20 |
| 5 | WO2023012836A1 | Method for hydrogen production coupled with co 2 capture | 10 |
| 6 | WO2021146733A1 | Organosilica membranes, methods of making same, and uses thereof | 6 |
| 7 | US10948224B2 | Refrigeration cycles with liquid-liquid phase transitions | 6 |
| 8 | WO2019195296A1 | Thermally-rearranged polymer blends for gas separation membranes | 6 |
| 9 | WO2022220892A1 | Process for purification and conversion of carbon dioxide using renewable energy | 2 |
| 10 | WO2022182296A1 | Anion-doped metal oxide | 2 |
Citation counts favour older documents simply because they have had more time to be cited — treat this as a measure of influence within the searched corpus, not of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Pre-Combustion & Oxy-Fuel Capture Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the numbers say
Three read-throughs from the filing and citation data that matter for anyone deciding where to file or license next.
Concentration
69.5%
of 59 records held by the top 5 assignees
Filing sits with a small group, not a single monopolist
The top 5 combined account for 69.5% of all 59 records in scope, and the top 10 reach 88.1%. The leader holds 15 records against a fifth-place figure of 5 and a tenth-place figure of 1 — concentration at the top, but not a single-owner field.
Assignee ranking, 18 companies
Momentum
-94%
2021 peak (17) to 2024 (1)
The filing peak has passed, at least on paper
Every leading assignee tracked for recent-year momentum shows zero filings in the latest year, consistent with the overall -94% contraction from 2021 to 2024. Treat this as the filing curve cooling after a peak rather than proof the underlying capture routes are abandoned.
Filing trend, 2015-2026
Citations
103 citations
on the top-cited record
Influence clusters around one hydrogen co-production family
The most-cited documents in this dataset are variants of the same co-production of hydrogen and electrical energy system, with the lead record cited 103 times. A more recent refrigeration-cycle record and a 2023 hydrogen-with-CO2-capture method show citation activity has not stopped, just shifted to newer filings.
Most-cited records
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Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to pre-combustion & oxy-fuel capture patent landscape, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Pre-Combustion & Oxy-Fuel Capture Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is filing, and where the gaps sit
The ranked field covers 18 companies; a handful account for most of the volume while sub-areas of the claim space remain thin.
Leader
15 records
of 59 in scope
One assignee sets the pace
The leading assignee's 15 records put it well ahead of the fifth-place figure of 5, giving it the densest claim coverage in the dataset. Anyone filing adjacent to its core chemistry should expect to design around, not just file near, its existing family.
Assignee ranking
Long tail
18 companies
in the ranked field
A wide field below the leader
Below the top 10 (88.1% of records), the remaining entrants each hold small numbers of filings. That long tail includes research foundations and individual inventors alongside industrial gas and turbine companies, suggesting the field is still open to new entrants rather than locked up.
Assignee ranking, 18 companies
Geography
13 EPO filings
leading receiving office
Europe and the US lead filing venues
Europe (EPO) leads with 13 filings, ahead of the United States at 11 and WIPO (PCT) route filings at 9. India, Canada and Australia each carry smaller but non-trivial shares, pointing to filing strategies that reach beyond a single home jurisdiction.
Receiving offices
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| NextChem S.p.A. | 0 | — |
| Nuovo Pignone Tecnologie S.r.l. | 0 | -100% |
| General Electric Company | 0 | — |
| Infinium Technology LLC | 0 | — |
| European Turbine Company | 0 | — |
| THE RES FOUNDATION FOR THE STATE UNIV OF NEW YORK | 0 | — |
| NOVEK ETHAN J | 0 | — |
| JACKSON JOHN | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Pre-Combustion & Oxy-Fuel Capture Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's next
Where to take this next
The dataset points to a field with a settled leader, a cooling filing curve on paper, and several sub-areas still open to new claims.
Check freedom-to-operate before filing near the leader
With one assignee holding 15 of 59 records, a new filing in its core chemistry needs a claim-by-claim comparison, not just a keyword search.
Run a freedom-to-operate checkTrack whether 2025-26 filings confirm the pullback
The -94% drop from 2021 to 2024 is real, but publication lag means 2025-26 figures are still incomplete — revisit this trend once they settle.
Monitor filing trendsExplore the under-claimed branches directly
Sorbent regeneration cycles, organosilica membrane ratios and electrolytic CO2 conversion show thinner filing density than the core chemistry classes.
Explore white space in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Pre-Combustion & Oxy-Fuel Capture Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions about this landscape
One assignee leads with 15 of the 59 records in this dataset, well ahead of the fifth-ranked company at 5. The top 5 assignees combined hold 69.5% of all 59 records, and the top 10 reach 88.1%, so filing activity is concentrated but not owned by a single company. The ranked field covers 18 companies in total, including research foundations and individual inventors alongside industrial gas and turbine manufacturers.
Filings peaked at 17 in 2021 and fell to 1 in 2024, a 94% drop over that three-year span. That said, publication typically lags actual filing by around 18 months, so 2025 and 2026 figures in any dataset are still incomplete and should not yet be read as confirming a slowdown. The safest reading is that the 2021 peak has passed on paper, while the underlying commercial picture may look different once later years finish publishing.
C01B, covering non-metallic elements and inorganic compounds, appears in 52.5% of the 59 records and is the single largest IPC subclass. B01D separation processes (35.6%) and F02C gas-turbine plants (33.9%) follow closely, showing that claims typically combine a chemistry element with a plant-integration element rather than sitting in a single narrow class. Because records can carry multiple IPC codes, these percentages add up to more than 100%, which is expected.
Sub-areas such as sorbent regeneration cycle design, refrigeration-cycle liquid-liquid phase transitions, and organosilica membrane crosslinking show comparatively thin filing density relative to the core inorganic-chemistry and gas-turbine classes. Electrolytic CO2 stream conversion (C25B) and hydrogen co-production coupled with capture also appear in smaller shares of the 59 records. These are not guarantees of a clear field, but they are areas where the claim space is less crowded than the dominant classes.
The European Patent Office leads with 13 filings, followed by the United States at 11 and the WIPO PCT route at 9. India, Canada and Australia each show smaller but meaningful filing counts. A filer weighing where to seek protection should note that European and US coverage together account for the largest share of receiving-office activity in this dataset.
Answers are grounded in the same dataset. Derived from a Patsnap search on Pre-Combustion & Oxy-Fuel Capture Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.