Capacitive Deionization Sensor Monitoring Patent Landscape 2026
- 9 of 10 families filed in a single year (2017) with nothing recorded at the 2022 midpoint — this is a narrow, spiky corpus, not a maturing field.
- Every record sits in one IPC subclass, C02F meaning monitoring-specific sensor claims are still being drafted inside water-treatment method language, not as standalone apparatus claims.
- The most recent filing, US20260138898A1 (Samsung, 2026) claims a power-off/reverse-voltage regeneration cycle — control logic, not sensor hardware — leaving sensor-triggered regeneration open.
A narrow, spiky corpus around CDI monitoring
This landscape covers 10 patent families filed against capacitive deionization combined with conductivity, water-quality, or effluent monitoring terms, classified under water-treatment and electrochemical-sensing IPC codes. Activity is heavily front-loaded: nine of the ten families were filed in a single year, 2017, and the trend goes flat through the 2022 midpoint before a single new filing appears in 2026. Publication lag of roughly 18 months means the most recent year is always undercounted, so the apparent gap since 2017 is likely narrower than the raw numbers show.
Every record in the set classifies under C02F, water and wastewater treatment, with no spread into a dedicated sensor-hardware subclass — a sign that monitoring is currently claimed as a feature of a treatment method rather than as its own apparatus category. Office coverage is led by the United Kingdom, followed by the United States, Europe and a single PCT filing, pointing to filing strategies built around specific national markets rather than broad multi-jurisdictional protection.
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Filing trend and technology composition
Ten patent families, filed almost entirely in a single year, mapped against one IPC subclass and four receiving offices.
Filing trend, 2015-2026
Filings spike to 9 in 2017 and fall to zero by the 2022 midpoint, with nothing yet recorded past that beyond the single 2026 Samsung filing — a flat-to-declining pattern, not a growth curve. Publication lag means the most recent years are always undercounted, so treat the 2026 gap as provisional.
IPC composition
Every one of the 10 records classifies under C02F (water and wastewater treatment); none spill into a separate sensor-hardware or electrochemistry subclass, which means monitoring-specific claims are being drafted inside water-treatment method language rather than as standalone sensor apparatus claims.
Shares are the percentage of the 10 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Capacitive Deionization Sensor Monitoring with Eureka
This page is one run against one query. Ask Eureka your own question about capacitive deionization sensor monitoring and every answer comes back with the patent numbers behind it.
Try EurekaThe record shaping this space right now
Capacitive deionization device and method for controlling capacitive deionization device
A capacitive deionization device comprises: a pair of electrodes; and a controller configured to perform a water softening operation that applies a positive voltage across the pair of electrodes, configured to operate in a power-off mode that short-circuits or open-circuits the pair of electrodes based on termination of the water softening operation, and configured to perform a regeneration operation that applies a negative voltage across the pair of electrodes based on satisfaction of a predetermined condition while operating in the power-off mode.Filed by Samsung Electronics Co., Ltd., published 2026-05-21 — the newest record in this dataset.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20190233314A1 | Method and apparatus for providing ultrapure water | 19 |
| 2 | WO2018069674A1 | Method and apparatus for providing ultrapure water | 7 |
Ranked by citation count within this corpus; citation counts favour older filings and should be read as influence, not current importance.
Publication numbers are shown where the record carries one (2 of 2 rows); clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for filing strategy
A small, spiky dataset with one dominant citation cluster and one live 2026 filing — read together, they point to where claim space is still open.
One year carries the corpus
Nine of the ten families in this dataset were filed in 2017, with no activity recorded at the 2022 midpoint. That kind of spike usually traces back to a short, concentrated R&D or continuation push rather than sustained industry-wide investment.
No dedicated sensor-hardware class
Every record classifies under C02F, water and wastewater treatment, with none spilling into a separate sensor or electrochemistry subclass. Monitoring claims here are consistently framed as part of a treatment method, not as independent sensor apparatus.
Old ultrapure-water claims still get cited
The two most-cited records both describe ultrapure-water apparatus rather than sensor-integrated CDI control, and one carries 19 citations. That is a signal of past influence on examiners, not evidence that ultrapure-water framing is the current commercial preference.
Zero recent-year filings, one live 2026 record
Both VWS UK and Samsung Electronics show zero filings in the latest full year, with Samsung's year-over-year change at -100%. Samsung's single 2026 filing on device control is the newest activity in the set.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to capacitive deionization sensor monitoring, with the prior art for and against each one.
Who holds the claims, and where the gate sits
Ten families and two named assignees with recent-year data give a thin but readable picture: activity is either dormant or just restarting, and the open claim space is easy to locate.
VWS UK
VWS UK shows zero filings in the latest recorded year, with no offsetting activity elsewhere in the dataset to suggest a renewed push. Its historical presence in the corpus predates the current filing gap.
Samsung Electronics (三星电子株式会社)
Samsung's year-over-year change sits at -100%, yet it holds the single newest filing in the set, US20260138898A1, on power-off and reverse-voltage regeneration control. That combination suggests a pause followed by one fresh, narrowly-scoped filing rather than a sustained campaign.
Ultrapure-water apparatus filings
The most-cited record in this corpus describes ultrapure-water apparatus rather than CDI-specific sensor control, and it anchors a related WO filing on the same theme. Its influence is measured in citations built up over time, not in recent filing activity.
| Assignee | Recent year | YoY |
|---|---|---|
| VWS UK | 0 | — |
| Samsung Electronics Co., Ltd. | 0 | -100% |
Where to take this analysis
The dataset is small enough to review in full, but that also means a single new filing could shift the picture quickly.
Check the 2026 filing against your own control logic
If you are designing a CDI controller with a power-off hold and reverse-voltage regeneration step, compare it directly against US20260138898A1 before finalising claim language.
Review the record in EurekaTest claims in the sensor-triggered regeneration gap
No record in this corpus ties regeneration timing directly to a live sensor reading — that gap is draftable now, while the prior art is thin.
Draft and stress-test a claim in EurekaTrack Samsung and VWS UK for renewed filing
Both named assignees show zero recent-year activity; a resumption from either would change the competitive read quickly given the small total family count.
Set up monitoring in EurekaFrequently asked questions
This dataset contains 10 patent families published between 2015 and the 2026 cut-off, all classified under IPC subclass C02F for water and wastewater treatment. That is a small corpus, so any single filing carries more relative weight than it would in a crowded field. Because publication lags filing by roughly 18 months, the true count for the most recent one or two years is likely understated.
The evidence shows 9 of the 10 families filed in 2017, with a flat-to-declining pattern afterward and nothing recorded at the 2022 midpoint. A concentrated single-year spike like this often reflects one or two assignees filing related continuations or a short window of active R&D rather than a sustained wave of industry investment. It does not by itself indicate the technology stalled — only that patenting activity around this specific claim language did.
VWS UK and Samsung Electronics (三星电子株式会社) both appear in the recent-year momentum data, and both show zero filings in the latest year, with Samsung's year-over-year change recorded at -100%. Samsung does hold the newest record in the corpus, a May 2026 filing on CDI device control, so recent activity has not stopped entirely — it has simply not repeated across a full year yet. Momentum figures this small should be read as directional signals, not trend lines.
US20260138898A1, assigned to Samsung Electronics and dated 2026-05-21, claims a capacitive deionization device with a controller that runs a water-softening step, then a power-off mode that short-circuits or open-circuits the electrode pair, then a regeneration step applying a negative voltage once a set condition is met. It is a control-cycle claim, not a sensor-hardware claim, so it constrains how a CDI unit's electrodes are sequenced rather than what kind of monitoring sensor feeds that sequence. Anyone replicating that exact three-state cycle should review this filing before shipping a similar controller.
The corpus is entirely concentrated in IPC C02F with no spread into dedicated sensor-apparatus classifications, and office coverage skews toward the UK with only one PCT filing, meaning broad multi-jurisdictional protection for monitoring-specific architectures is not yet locked down. Under-claimed areas include sensor-triggered (rather than timer- or condition-triggered) regeneration, multi-parameter feedback combining conductivity with other water-quality signals, and retrofit sensor modules for existing CDI stacks. Given only 10 families total, a well-drafted claim in any of these areas would face a light prior-art burden compared with denser fields.
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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.