Dielectric Fluids for Immersion Cooling Patents: Leaders & Trends 2026
- Flat filing activity. the trend runs from zero filings in 2017 to a peak of 7 in 2024, then back toward zero by the 2026 cut-off — growth has not been sustained.
- Material and hardware classes are tied. C09K (materials for miscellaneous applications) and H05K (printed circuits & assemblies) each cover 56.0% of the 25 records in scope, showing fluid chemistry and rack-level integration are claimed together, not separately.
- No single filer dominates. the leader holds 6 of the ranked families against a field of 20 ranked companies, with most positioned as single- or few-filing entrants.
What this landscape covers
This review covers 25 published records matching immersion cooling fluid claims — filed against material compatibility, dielectric strength, moisture, viscosity, pumping power, two-phase fluid GWP, PFAS status and fluid life — between 2015 and the 2026-07-31 data cut-off. Records are drawn from a mix of chemical and electronics filers, reflecting that immersion cooling fluid patents sit at the junction of specialty lubricant chemistry and data-centre hardware design.
Because publication lags filing by roughly 18 months, the 2025 and 2026 figures in this dataset are necessarily undercounted; treat the apparent decline after the 2024 peak as provisional rather than confirmed.
Filing trend and technology composition
Two views of the same 25-record dataset: filings by year, and the IPC subclasses those filings carry.
Filings by year
Filings run from zero in 2017 to a peak of 7 in 2024, with 2022 at the 6-filing midpoint. The line is flat-to-declining rather than showing sustained growth, though the final one to two years are understated due to publication lag.
IPC subclass composition
C09K and H05K each appear on 56.0% of the 25 records, with C08G, G06F and H10W each on 20.0% and C08L, C07F and H01L each below 15%. Because a record can carry several classes, these shares sum to more than 100% of the record total — they show which combinations of fluid chemistry and hardware integration filers claim together, not a partition of the field.
Shares are the percentage of the 25 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Dielectric Fluids for Immersion Cooling with Eureka
This page is one run against one query. Ask Eureka your own question about dielectric fluids for immersion cooling and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative and most-cited filings
Immersion cooling fluid containing white alkanes
The filing describes an immersion cooling fluid combining White Alkanes with Highly Refined Alkanes into a single mixture aimed at high thermal performance, material compatibility and extended operating life. It positions itself against conventional thermal fluids that rely on non-renewable feedstocks, integrating renewable oils to reduce environmental impact while targeting the same performance envelope.Filed 2026-06-25 — illustrates the shift toward bio-derived base fluids as an alternative to synthetic or fluorinated chemistries.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20220369504A1 | Methods and systems for fluid immersion cooling | 18 |
| 2 | WO2024254770A1 | Dispersion of a wax in an alkyl methyl siloxane fluid | 1 |
| 3 | EP4093170A1 | Methods and systems for fluid immersion cooling | 1 |
Citation counts favour older records simply because they have had more time to be cited — read this as a signal of influence within the searched corpus, not of current technical importance.
Publication numbers are shown where the record carries one (3 of 3 rows); clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Read alongside the trend and IPC data, three patterns stand out for anyone deciding where to file or where to watch.
Growth has not held past its peak
Filings rose from zero in 2017 to a peak of 7 in 2024, with the 2022 midpoint at 6. The apparent fall-off toward the 2026 cut-off is partly a publication-lag artefact, but the absence of a clear upward run since 2022 means this is not yet a field in acceleration.
Fluid chemistry and hardware claims travel together
C09K and H05K each cover 56.0% of the 25 records, meaning more than half the filings pair a materials claim with a printed-circuit or assembly claim in the same family. Filing a fluid composition alone, without addressing the hardware interface, leaves part of the claim space unclaimed.
No dominant gatekeeper yet
The leading assignee holds 6 of the ranked families against a field of 20 ranked companies, with the fifth-place holder at 3 and tenth place at 2. That spread points to a field still open to new entrants rather than one locked up by a single incumbent.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to dielectric fluids for immersion cooling, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Dow Silicones Corp | Dow Global Technologies LLC | 4 |
| Wacker Chemie AG | ZHANG SIYUAN | 2 |
| SHAH JIMIL | MTS IP HLDG LTD | 2 |
| Dow Silicones Corp | WEI PENG | 1 |
| Dow Silicones Corp | TANG ZHENGMING | 1 |
| Dow Silicones Corp | BHAGWAGAR DORAB | 1 |
| Dow Global Technologies LLC | WEI PENG | 1 |
| Dow Global Technologies LLC | TANG ZHENGMING | 1 |
Ten co-assignee pairs appear in the dataset, the strongest linking a pair of related corporate entities on 4 records — evidence of internal group filing rather than broad cross-company collaboration.
Who is filing, and where the gaps sit
The ranked assignees span specialty chemical majors, oil and lubricant refiners, and smaller IP holding entities — a mix consistent with a field still being defined rather than consolidated.
The largest single filer
The top-ranked assignee holds 6 of the 25 records in scope, the largest single position in the ranking but well short of dominating a field of 20 ranked companies.
A compact group of repeat filers
Fifth place in the ranking sits at 3 records, indicating a small group of assignees with more than one filing but well below the leader's count.
Most of the field files once or twice
Tenth place holds 2 records, and the ranking runs to 20 companies total — most entrants in this space are single- or double-filing, which keeps the barrier to a first filing relatively low.
| Assignee | Recent year | YoY |
|---|---|---|
| Saijiji Technology Services (Beijing) Co., Ltd. | 0 | — |
| Dow Silicones Corp | 0 | — |
| Dow Global Technologies LLC | 0 | — |
| Wacker Chemie AG | 0 | -100% |
| TotalEnergies OneTech | 0 | — |
| UOP LLC | 0 | -100% |
| Global Standard Tech | 0 | -100% |
| ZHANG SIYUAN | 0 | — |
Where to take this next
The dataset points to open questions rather than a settled field. These are the directions worth following up.
Track the post-2024 filings as they publish
Because publication lags filing by roughly 18 months, the apparent decline after the 2024 peak of 7 records will not be confirmed or disproved until 2027–2028 filings clear the publication queue.
Monitor filing trendsWatch the fluid-hardware claim pairing
With C09K and H05K each on 56.0% of records, new entrants should check whether a fluid-only or hardware-only claim leaves an opening, or whether the combined claim is now the default approach.
Explore IPC compositionAssess the bio-derived base fluid angle
The 2026 representative filing on white-alkane blends signals a move toward renewable base fluids as an alternative to synthetic or fluorinated chemistries — worth tracking as a distinct sub-branch.
Review representative filingFrequently asked questions
This dataset identifies 25 published records matching immersion cooling fluid claims, filed between 2015 and the 2026-07-31 cut-off. The records are drawn from claims around material compatibility, dielectric strength, moisture resistance, viscosity, pumping power, two-phase fluid GWP, PFAS status and fluid life. Because publication lags filing by roughly 18 months, the true count of filings from the last one to two years will be higher than currently visible.
The ranking covers 20 companies, with the leading assignee holding 6 of the ranked families, fifth place at 3, and tenth place at 2. That spread is a long tail rather than a concentrated field — most assignees in the ranking hold only one or two records. The mix includes specialty chemical majors, oil and lubricant refiners, and smaller IP-focused entities, consistent with a technology area still being defined rather than consolidated around one incumbent.
Not on the evidence to date. Filings ran from zero in 2017 to a peak of 7 in 2024, with the 2022 midpoint at 6, and the trend flattens or declines toward the 2026 cut-off. Some of that apparent decline is a publication-lag artefact rather than a genuine slowdown, since the most recent one to two years of filings have not fully published yet. Anyone using this trend to size the opportunity should treat the last two data points as provisional.
C09K (materials for miscellaneous applications) and H05K (printed circuits & assemblies) each appear on 56.0% of the 25 records in scope, the two most common IPC subclasses by a wide margin. C08G, G06F and H10W each appear on 20.0% of records, and C07F, C08L and H01L appear less frequently. Because a record can carry multiple classes, these shares add up to more than 100% of the record total — they show that fluid chemistry and hardware-integration claims are frequently filed together in the same family.
PFAS status is one of the claim elements searched for in this dataset, alongside dielectric strength, viscosity and fluid life, but the evidence available does not break out a PFAS-specific filing count or trend on its own. The representative 2026 filing in this dataset moves toward a bio-derived alkane blend rather than a fluorinated chemistry, which is one visible data point suggesting some filers are exploring non-PFAS routes. A fuller answer would require isolating PFAS-specific claim language across the corpus, which this summary does not do.
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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.
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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.