MOF CO2 Adsorption Patents: Top Companies & Filing Trends 2026
- Filing is still climbing. 2021→2024 filings rose 16% (1,967 to 2,287), with 2023 the peak year so far at 2,362 — the field has not plateaued.
- No single owner dominates. The leading assignee holds 496 records and the top 5 combined are just 6.9% of all 24,103 records in scope — this is a long-tail field, not a two-player race.
- Separation and catalysis carry the claim density. B01J and B01D together cover roughly half of all records, while battery-adjacent H01M filings (7.6%) show MOF-CO2 work bleeding into energy storage.
Filing growth compares 2021 (1,967 records) with 2024 (2,287) — 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 24,103 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape maps 24,103 published records filed against metal-organic framework and porous coordination polymer chemistries specifically tied to carbon-dioxide adsorption, gas storage and separation claims. The scope spans filings from 2015 through the 2026 cut-off, capturing both core MOF synthesis claims and downstream application claims in separation, catalysis and energy storage. Publication lags filing by roughly 18 months, so the most recent filing years are undercounted relative to where they will eventually settle.
The dataset draws on assignee-level records rather than a single jurisdiction, letting the ranking reflect global filing behaviour across China, the United States, WIPO/PCT, Europe, Canada and Australia. Because a single record can carry several IPC classes, the technology composition below is read as coverage across classes, not a partition of the corpus.
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Filing trends and technology composition
Two views of the same 24,103-record corpus: how filing volume has moved year over year, and how that volume splits across the IPC subclasses that carry MOF-CO2 adsorption claims.
Filing volume is still rising
Annual filings grew from 941 in 2017 to a peak of 2,362 in 2023, and the most recent complete three-year span (2021-2024) shows +16% growth from 1,967 to 2,287 filings. Years after 2024 are shown but understated because of publication lag, and should not be read as a slowdown.
Separation and catalysis classes dominate
B01J (chemical/physical processes & catalysis) covers 28.8% of records and B01D (separation processes) covers 22.4%, together anchoring the corpus around gas-processing applications. C08G (condensation polymers, 14.1%) and C07F (organo-metallic compounds, 6.8%) sit underneath as framework-chemistry classes, while H01M (batteries & fuel cells, 7.6%) marks a smaller but real crossover into energy storage.
Shares are the percentage of the 24,103 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Porous Materials & MOFs — MOF Carbon-Dioxide Adsorption Patent Landscape with Eureka
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Try EurekaRepresentative and most-cited filings
US20250124196A1 — Information processing method for metal organic framework adsorption-desorption characteristics
Filed by Sumitomo Chemical and published 2025-04-17, this record claims an information-processing method that inputs MOF structural parameters into a trained model to output predicted adsorption-desorption characteristics, aiming to estimate MOF gas-handling performance computationally rather than through iterative synthesis and testing.Abstract text drawn directly from the published filing.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20160085003A1 | Materials, components, and methods for use with extreme ultraviolet radiation in lithography and other applic… | 434 |
| 2 | US20040090195A1 | Efficient control, monitoring and energy devices for vehicles such as watercraft | 211 |
| 3 | WO2017210874A1 | Imperfect mofs (IMOFS) material, preparation and use in catalysis, sorption and separation | 207 |
| 4 | US6930193B2 | Isoreticular metal-organic frameworks, process for forming the same, and systematic design of pore size and f… | 184 |
| 5 | US6893564B2 | Shaped bodies containing metal-organic frameworks | 172 |
| 6 | US20180065105A1 | Multilayer polymeric membrane and process | 165 |
| 7 | US20030222023A1 | Shaped bodies containing metal-organic frameworks | 163 |
| 8 | US20130313193A1 | Metal-organic framework supported on porous polymer | 160 |
| 9 | US6624318B1 | Process for the epoxidation of an organic compound with oxygen or an oxygen-delivering compounds using cataly… | 160 |
| 10 | WO2022103712A1 | Nano-partitions (encapsulated nucleic acid processing enzymes) for cell-lysis and multiple reactions in parti… | 156 |
Citation counts favour older filings that have had more time to accumulate citations within this searched corpus — read them as a signal of influence on the field, not of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Four read-throughs of the same dataset, aimed at the questions a filing or freedom-to-operate review actually needs answered.
No single assignee controls the field
The leading assignee holds 496 records out of 24,103, and the top 5 combined reach only 6.9% of all records in scope. Even the top 10 combined reach just 12.0%. This is a fragmented field with a long tail of single- and low-filing entrants rather than a small set of blocking incumbents.
Filing activity is still building, not cooling
Complete-year filings rose from 1,967 in 2021 to 2,287 in 2024, with 2023 as the highest single year recorded at 2,362. Recent-year assignee-level declines shown in some trackers reflect publication lag on 2025-2026 data, not an actual pullback in filing.
Filing is heavily weighted to China, with real activity elsewhere
China accounts for 9,028 records, more than double the United States at 3,841. WIPO/PCT (1,941) and Europe (1,780) add meaningful international filing behind that, with Canada and Australia trailing at 502 and 449.
Catalysis and separation claims carry the most density
B01J and B01D together touch roughly half of all records once overlapping classifications are accounted for, meaning claim space around catalytic and separation-process uses of MOFs is comparatively occupied. Framework-chemistry classes like C07F (6.8%) and C01B (6.5%) carry less density and are worth a closer freedom-to-operate look.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to porous materials & mofs — mof carbon-dioxide adsorption patent landscape, with the prior art for and against each one.
Who is filing, and where activity has cooled
The ranking spans 100 companies with no dominant blocker at the top, and recent-year momentum data shows several previously active filers stepping back sharply rather than accelerating.
A fragmented top of the table
The leading assignee's 496 records give it the largest single share, but that share is small against the full corpus — the field rewards technical specificity over sheer filing volume at this point.
Several established filers went quiet in the latest year
South China University of Technology dropped to 5 filings in the latest year (-69% YoY), and University of California dropped to 1 (-86% YoY). Two other ranked filers recorded zero filings in the latest year, a -100% YoY move that likely reflects publication lag as much as a strategic pause.
Cross-institution filing is concentrated in a few academic pairings
The strongest co-assignee link in the dataset pairs two French research institutions on 69 joint records, with a second France-based pairing at 53 and a corporate-academic pairing at 42. These recurring pairs point to established joint-filing programmes rather than one-off collaborations.
| Assignee | Recent year | YoY |
|---|---|---|
| South China University of Technology | 5 | -69% |
| The Regents of the University of California | 1 | -86% |
| Commonwealth Scientific and Industrial Research Organisation | 1 | -50% |
| BASF SE | 0 | -100% |
| ExxonMobil Technology and Engineering Company | 0 | -100% |
| King Abdullah University of Science and Technology | 0 | — |
| Centre National de la Recherche Scientifique (CNRS) | 0 | -100% |
| Zhejiang University | 0 | -100% |
Where to take this
The landscape points to open technical questions rather than a settled map — three directions worth pursuing before committing filing budget.
Model the white space before drafting claims
The under-claimed branches identified here (linker functionalisation, ML-assisted prediction, shaped industrial forms) sit next to dense claim territory in B01J and B01D. A targeted search inside those adjacent branches will show whether the gap is real or just thinly documented.
Explore white space in Eureka →Watch the momentum shifts, not just the leaderboard
Several ranked filers pulled back sharply in the latest year while overall filing volume kept growing — that gap between aggregate and assignee-level trends is where competitive shifts show up first.
Track assignee momentum in Eureka →Treat citation counts as history, not priority
The most-cited records in this corpus are mostly older filings; that reflects time-to-accumulate citations, not present-day relevance. Weight recent filings by IPC class and assignee activity instead.
Run a fresh citation-adjusted search in Eureka →Common questions about this landscape
The ranking covers 100 companies, and no single one dominates: the leading assignee holds 496 records against a total of 24,103, and the top 5 combined reach only 6.9% of all records in scope. Names appearing near the top include BASF, University of California, ExxonMobil's technology and engineering arm, CNRS and King Abdullah University of Science and Technology, spanning both chemical majors and research universities. This spread means competitive positioning depends more on which specific sub-application a filer targets than on out-filing a dominant incumbent.
It is growing. Complete-year data shows filings rising from 1,967 in 2021 to 2,287 in 2024, a 16% increase, with 2023 the peak year recorded so far at 2,362. Figures for 2025 and 2026 appear lower in raw counts, but that reflects the roughly 18-month lag between filing and publication rather than an actual drop in activity, so those years should not yet be read as a slowdown.
B01J, covering chemical and physical processes including catalysis, accounts for 28.8% of the 24,103 records, and B01D, covering separation processes such as filtration, accounts for 22.4%. C08G (condensation polymers) follows at 14.1%, with organo-metallic compounds (C07F), inorganic compounds (C01B) and battery-related H01M each in the 6-8% range. Because records can carry multiple classes, these figures describe coverage rather than a strict partition of the corpus.
China leads by a wide margin with 9,028 records, more than double the United States at 3,841. WIPO's PCT route accounts for 1,941 records and the European Patent Office for 1,780, with Canada (502) and Australia (449) trailing behind. This distribution suggests that a freedom-to-operate review focused only on US and European filings would miss the majority of the documented activity.
This Sumitomo Chemical filing, published April 2025, claims an information-processing method that predicts a MOF's adsorption-desorption characteristics by feeding structural parameters into a trained model, rather than determining them through physical synthesis and testing. It sits in the computational-prediction corner of the landscape rather than in core separation or catalysis claim territory, so it is most relevant to teams building predictive or high-throughput screening pipelines for MOF materials, not to those filing on framework synthesis or gas-separation processes directly.
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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.