Carbon Capture and Storage Patents: Who Leads, Where Gaps Are 2026
- Filing has plateaued, not grown. Filings peaked at 24 in 2023 after climbing from 16 in 2017, with the 2022 midpoint at 10 — a pattern of flat-to-declining momentum rather than sustained growth.
- One IPC subclass dominates almost every filing. B01D separation processes appear in 95 of 98 families, meaning nearly every applicant is filing through the same gas-separation claim language regardless of their actual capture route.
- The US receives the largest single share of filings. The United States leads with 32 records, ahead of PCT (17), China (12) and Europe (12) — a filing pattern worth checking against your own jurisdictional strategy before drafting.
What this landscape covers
This landscape draws on 98 patent families published between 2017 and 2026 that combine carbon capture and storage terminology with claim language tied to CO2 capture, geological storage, CO2 injection, or post-combustion capture, filtered against IPC classes covering gas separation, drilling operations, and gas treatment. The corpus spans separation-process engineering, subsurface injection and storage, and the catalytic and combustion-residue handling steps that surround a capture plant.
Because publication typically lags filing by around 18 months, the 2025 and 2026 counts in the trend chart are undercounted relative to where filing activity actually stands today. Treat the most recent one to two years as a floor, not a ceiling.
Filing trend and technology composition
The filing curve and the IPC breakdown together describe a field that has stopped expanding and consolidated around one dominant separation-process classification, with smaller pockets of activity in drilling, catalysis, and combustion-residue handling.
A plateau after 2023, not a downturn
Filings rose from 16 in 2017 to a peak of 24 in 2023, passing through a midpoint of 10 in 2022. That trajectory is flat-to-declining rather than compounding growth, and the partial 2026 count of 0 reflects publication lag rather than a stop in filing.
B01D separation processes carry almost the entire corpus
B01D appears in 95 of 98 families, dwarfing every other subclass — B01J catalysis (16), C01B inorganic compounds (15), and E21B drilling (11) trail well behind. That concentration means most applicants are drafting around gas-separation mechanics even when their core innovation sits in storage, catalysis, or materials.
Shares are the percentage of the 98 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Carbon Capture and Storage Carbon Capture and Storage with Eureka
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Try EurekaThe foundational and the newest filing
Plant and method to improve the efficiency of CO2 capture and storage using precipitated calcium carbonate
A plant and method that improves CO2 capture and storage efficiency from atmospheric air using precipitated calcium carbonate (PCC) and calcium bicarbonates. The system combines an electric calciner, a contactor, a pH-correction apparatus, a buffering-substance dosing device, an absorber/precipitator, a separator, and a PCC dosing device, taking in electric energy, carbonate, water and atmospheric air and releasing CO2-lean air, a buffered ionic mixture, and excess PCC. The carbonates and bicarbonates function as the permanent CO2 storage medium.Filed by LIMENET S.R.L. Società Benefit, published 2025-08-14 — one of the most recent filings in the dataset.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20090081096A1 | Method and means for capture and long-term sequestration of carbon dioxide | 104 |
| 2 | WO2011017609A1 | Carbon capture and storage | 67 |
| 3 | US9121259B2 | Storing carbon dioxide and producing methane and geothermal energy from deep saline aquifers | 55 |
| 4 | US20180161719A1 | Process and apparatus of ocean carbon capture and storage | 23 |
| 5 | WO2022229838A1 | Process for producing hydrogen from a hydrocarbon feedstock | 20 |
| 6 | US11946001B2 | Process and system for producing fuel | 13 |
| 7 | US20230295523A1 | Process and system for producing fuel | 12 |
| 8 | US20150362188A1 | Sulphur-assisted carbon capture and storage (CCS) processes and systems | 12 |
| 9 | US20180272268A1 | Composite 3d-printed reactors for gas absorption, purification, and reaction | 10 |
| 10 | US11045758B2 | Process and apparatus of ocean carbon capture and storage | 7 |
Citation counts favour older filings simply because they have had more time to accumulate citations within the searched corpus — read them as a signal of influence on subsequent drafting, not as a ranking of current technical relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns stand out once family counts, IPC distribution and jurisdiction data are read together: concentrated claim language, a jurisdictional tilt toward the US, and a filing curve that has stopped climbing.
Separation-process claims are the default entry point
Nearly every family in this corpus, regardless of whether the underlying innovation is a sorbent, a storage method or a drilling technique, is drafted with B01D separation-process language. New entrants working in adjacent classes should expect prior art searches to surface this subclass almost automatically.
The US is the largest single receiving office
The United States receives more filings than PCT, China or Europe individually, with 32 records against 17 PCT, 12 China and 12 Europe. Applicants prioritising a single first-filing jurisdiction are choosing the US more often than any other office in this dataset.
Growth has flattened since the 2023 peak
Filings climbed from 16 in 2017 to a peak of 24 in 2023 by way of a 2022 midpoint of 10, then the visible count falls off — partly publication lag, but the shape overall reads as plateauing rather than accelerating.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to carbon capture and storage carbon capture and storage, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| PENG SIGAN | SIGAN PENG | 3 |
| PENG SIGAN | MARINE PROTECH LTD | 3 |
| SIGAN PENG | MARINE PROTECH LTD | 3 |
| Saudi Arabian Oil Company (Saudi Aramco) | Saudi Aramco Services Company | 1 |
Only 4 co-assignee pairs appear in the dataset, with the strongest links formed around a small cluster of three names filing together three times each — collaboration is the exception here, not the norm.
Who is filing, and where momentum has stalled
Recent-year momentum data shows several previously active assignees dropping to zero filings in the latest year, some with a documented -100% year-on-year change — consistent with the broader plateau seen in the filing trend.
Several established filers went to zero in the latest year
Assignees including Iogen Corporation and others tracked in the momentum data show a full drop-off to zero filings in the most recent year, some with a recorded -100% year-on-year change. That is consistent with the broader plateau in the filing trend rather than an isolated event.
A small cluster files together repeatedly
The strongest co-assignee links in the dataset connect the same small group of names across three shared filings each, out of only 4 co-assignee pairs total — most applicants in this space are filing solo.
A long tail sits behind the cited leaders
Against 98 total families, the most-cited records concentrate influence in a handful of foundational filings, while the majority of assignees appear with single or few filings — a long-tail structure typical of a field that has not yet consolidated around a small set of dominant players.
| Assignee | Recent year | YoY |
|---|---|---|
| PENG SIGAN | 0 | — |
| Lawrence Livermore National Security, LLC | 0 | — |
| WOJAK BOGDAN | 0 | — |
| IOGEN CORPORATION | 0 | -100% |
| Noble Drilling Services LLC | 0 | -100% |
| Saudi Arabian Oil Company (Saudi Aramco) | 0 | -100% |
| BENTAUS LLC | 0 | -100% |
| Limenet S.r.l. Società Benefit | 0 | — |
Where to take this analysis
The dataset points to a field where claim language has consolidated but ownership has not — useful context before committing search or drafting budget.
Map your own claims against the B01D cluster
With 95 of 98 families touching separation-process classification, any new filing should be checked against this cluster specifically, not just against carbon-capture keywords generally.
Run a claim comparison in EurekaWatch the assignees that dropped to zero
Several previously active filers show a -100% year-on-year change; tracking whether that reflects strategic withdrawal, acquisition, or a pause is worth a closer look before assuming the space is closing.
Set up assignee tracking in EurekaTest the under-claimed branches
Additive-manufactured contactors, mineralisation via cement chemistry, and injection-well engineering all show materially lower filing density than the core cluster and may offer more open claim space.
Explore white space in EurekaCommon questions on carbon capture and storage patents
This dataset tracks 98 patent families published between 2017 and 2026 that combine carbon capture and storage terminology with claims tied to CO2 capture, geological storage, injection or post-combustion capture. Filings rose from 16 in 2017 to a peak of 24 in 2023, passing through a midpoint of 10 in 2022. Because publication lags filing by roughly 18 months, the counts shown for 2025 and 2026 understate actual filing activity and should be read as a floor rather than a final figure.
The dataset shows a long tail of assignees rather than a small number of dominant filers, with only 4 co-assignee pairs recorded across the entire corpus and the strongest cluster sharing just three filings each. Several previously active assignees, including Iogen Corporation, show a drop to zero filings in the most recent year with a recorded -100% year-on-year change. This pattern suggests ownership in the space is fragmented and shifting rather than consolidated around a fixed set of leaders.
B01D, covering separation processes such as filtration and gas separation, appears in 95 of the 98 families in this dataset, making it by far the dominant classification regardless of the underlying capture route. B01J (catalysis, 16 records), C01B (inorganic compounds, 15 records) and E21B (drilling, 11 records) trail well behind. Anyone drafting a new claim in this field should expect prior art searches to surface the B01D cluster almost automatically, even for storage- or materials-focused innovations.
Relative to the dominant B01D separation-process cluster, subclasses like B33Y (additive manufacturing, 7 records), F23J (combustion residue handling, 8 records), C04B (cement and ceramics, 8 records) and C10G (refinery integration, 8 records) show materially lower filing density. That does not guarantee those areas are unclaimed, but it indicates less-crowded claim language around contactor geometry, mineralisation chemistry, and refinery retrofit integration compared with core separation mechanics.
The United States receives the largest single share of filings in this dataset at 32 records, ahead of PCT international applications at 17, and China and Europe tied at 12 each, with India at 9 and Australia at 4. This distribution suggests the US is the most common first- or priority-filing jurisdiction for applicants in this space, though PCT filings indicate a meaningful share are pursuing broader international protection from the outset.
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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.