Electrochemical and Moisture Swing Capture Patents
Filing peaked in 2021 at 8 records, then fell to 4 by 2024 a -50% swing over that three-year span, right as several university labs shifted toward electrode and catalyst stability work. Filings ran to zero in 2017, rose to a peak of 8 in 2021, and had fallen to 4 by 2024 — a -50% move over that span. 2025 and 2026 figures are not yet complete because of publication lag and should not be read as continued decline.
- 1VOLTA ENERGY9
- 2HASANOV ZAFAR3
- 3ABDULLAYEV YUSIF3
- 4麻省理工学院2
- 5美国西北大学1
See the full electrochemical and moisture swing capture analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions about this landscape
What is electrochemical or moisture swing carbon capture, in patent terms?
It is a category of direct air capture where CO2 is bound and released using a redox-active electrode cycle or a humidity-driven pH shift, rather than a thermal or solvent-based process. Patent claims in this dataset centre on faradaic efficiency, electrode stability, oxygen sensitivity, membrane selection and cell stacking — the parameters that determine whether a cell keeps working through repeated charge cycles in ambient air. Because these are electrochemical-cell designs, the claims frequently sit in battery and electrolytic-production classifications as much as in gas-separation ones.
How many companies are actively filing in this space?
The assignee ranking returned for this topic covers 10 companies, counted in records, and is the complete ranking the dataset returns rather than a top-50 or top-100 cut. One assignee holds 9 of the 20 ranked families, while the fifth- and tenth-ranked filers hold a single record each. That pattern points to a field with one concentrated filer and a long tail of one-off academic disclosures rather than broad corporate competition.
Is filing activity in this area rising or falling?
Filings rose from zero in 2017 to a peak of 8 records in 2021, then fell to 4 by 2024 — a -50% move over that three-year span, which is the most recent period that can be read as complete. Counts for 2025 and 2026 are still incomplete because patent publication typically lags filing by about 18 months, so they should not be treated as evidence of a continued decline. A clearer read on the most recent two years will only be possible once those publications catch up.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Electrochemical and Moisture Swing Capture covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.