Industrial Cooling Patents: Top Companies & Filing Trends 2026
- 22.6% concentration at the top. The top five assignees hold 483 of 2,139 records in scope, with a long tail of single- and low-filing entrants behind them.
- Filing has held roughly flat, not fallen. 2021 to 2024 (the last complete year) moved from 73 to 69 filings, a -5% change — read the 2025-26 dip as publication lag, not a slowdown.
- Water treatment outweighs mechanical refrigeration. C02F water and wastewater treatment claims 16.5% of records, ahead of F25B refrigeration and heat pumps at 13.5%, signalling where chemistry, not hardware, is doing the claiming.
Filing growth compares 2021 (73 records) with 2024 (69) — 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 2,139 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape draws on 2,139 published records matched on industrial cooling terms alongside sensing and thermal-load language such as temperature sensor, heat flux and working fluid. The scope spans 2015 through the 2026 cut-off, with the most recent year necessarily partial because publication typically lags filing by around 18 months.
Records here cluster less around compressors and coils than the phrase "industrial cooling" might suggest. Water and wastewater treatment chemistry, corrosion and scale-monitoring sensors, and heat-exchanger detail claims all sit inside scope, which is why the assignee list is dominated by chemical and process names rather than pure HVAC OEMs.
Filing trend and technology composition
Two views of the same 2,139-record set: how filing volume has moved year on year, and which IPC subclasses carry the claim density.
Filing trend, 2017-2026
Filings ran from 54 in 2017 to a peak of 92 in 2025, with 2021 (73) to 2024 (69) — the last complete year on the books — down a modest 5%. Treat 2025 and 2026 figures as still filling in rather than as evidence of decline.
IPC subclass composition
C02F (water and wastewater treatment) leads at 16.5% of the 2,139 records, followed by F25B (refrigeration and heat pumps) at 13.5% and C09K (materials for miscellaneous applications) at 11.3%. Because records can carry multiple IPC classes, these shares sum to more than 100%; they describe claim density, not a partition of the field.
Shares are the percentage of the 2,139 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Industrial Cooling Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about industrial cooling patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
Method and apparatus for estimating fouling factor and/or inverse soluble scale thickness in heat transfer equipment
Scale deposition on a heat transfer surface in a liquid system such as a heat exchanger is estimated by directing a small portion of the liquid flow through a test cell built around a sensor projecting through a conduit wall. The sensor is a conductive block with an embedded heater and a heated wetted test surface flush with the conduit's inside wall, containing two temperature sensors at different distances from the heated surface and heater; the periphery is designed to limit heat flow outward, concentrating the heat signal on the flow-side measurement.Filed by Solenis Technologies, L.P.; illustrates the sensor-and-inference approach to fouling detection that recurs across the C02F and F28F classes in this dataset.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4783314A | Fluorescent tracers – chemical treatment monitors | 334 |
| 2 | US6123145A | Synthetic jet actuators for cooling heated bodies and environments | 267 |
| 3 | US20050042151A1 | Nonwoven composites and related products and processes | 251 |
| 4 | US5734098A | Method to monitor and control chemical treatment of petroleum, petrochemical and processes with on-line quart… | 226 |
| 5 | US6457654B1 | Micromachined synthetic jet actuators and applications thereof | 210 |
| 6 | US5988522A | Synthetic jet actuators for modifiying the direction of fluid flows | 167 |
| 7 | US5957413A | Modifications of fluid flow about bodies and surfaces with synthetic jet actuators | 146 |
| 8 | US20140244051A1 | Direct drive fan system with variable process control | 134 |
| 9 | US20060197053A1 | Absorption cycle utilizing ionic liquid as working fluid | 129 |
| 10 | US20110241549A1 | Light generator systems and methods | 128 |
Citation counts favour older records simply because they have had longer to accumulate citations inside this corpus; read them as a signal of influence, not of current technical relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three read-throughs from the concentration, composition and citation data, aimed at where to file and where not to.
Leadership is real but not dominant
The leader holds 114 records and fifth place holds 69, for a combined 483 out of 2,139 records in scope — 22.6%. That is enough to shape prior art in core claim areas without closing the field: the top 10 combined reach 35.5%, meaning nearly two-thirds of records sit outside the ranked leaders' immediate portfolios.
Chemistry claims more ground than hardware
C02F (water and wastewater treatment) sits ahead of F25B (refrigeration and heat pumps) in share of records, with C09K materials and A01N biocides close behind at 11.3% and 10.5%. For a field named "industrial cooling", the density of chemical-treatment and sensing classes signals that scale, fouling and corrosion control carry as much claim weight as the mechanical cooling loop itself.
Influence skews old, not necessarily current
The most-cited records in this set date from the fluorescent-tracer and synthetic-jet-actuator era; their citation counts reflect decades of accumulation inside a searched corpus rather than present-day relevance. New filers should treat these as foundational prior art to design around, not as a map of where activity is happening now.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to industrial cooling patent landscape, with the prior art for and against each one.
Who is filing, and who has slowed
The ranked leaders combine chemical-treatment majors with a long tail of single-country filers; recent-year activity has thinned even among the top names, consistent with publication lag rather than genuine exit.
A chemical-treatment incumbent sets the pace
The top-ranked assignee holds 114 records, well ahead of fifth place at 69 and tenth place at 38 — a steep early drop-off that flattens quickly across the rest of the ranked field.
Recent-year filings have gone quiet at the top
Several of the most historically active assignees show zero or one record in the latest year tracked. That pattern is consistent with an 18-month publication lag hiding recent filings rather than leaders exiting the space outright.
Co-filing is sparse and concentrated
Only ten co-assignee pairs appear in the dataset, and the strongest of them link a single major filer to named individual inventors or a closely related corporate affiliate — evidence of internal R&D structure more than cross-company joint development.
| Assignee | Recent year | YoY |
|---|---|---|
| Brisa International LLC | 1 | — |
| Rohm and Haas Company | 0 | — |
| E.I. du Pont de Nemours and Company | 0 | — |
| Ecolab USA Inc. | 0 | — |
| Abell Foundation Inc. | 0 | — |
| Nalco Company | 0 | — |
| Saudi Arabian Oil Co. (Saudi Aramco) | 0 | — |
| PRIME DATUM INC | 0 | -100% |
Where to take this
Three practical next steps for a team deciding where to file or where to watch.
Check claim density before drafting
Run the specific sensor or chemistry approach you are considering against the C02F, F28F and G01N classes before committing claim language — density there is high enough that narrow, specific claims will fare better than broad ones.
Explore IPC composition in EurekaWatch the 2025-26 filings as they publish
The apparent peak at 92 in 2025 and the dip into 2026 are both artefacts of publication lag; re-check this trend once records from the last 18 months have fully published before drawing conclusions about momentum.
Track filing trends in EurekaMap the white space chips against your portfolio
The under-claimed sub-areas identified here are starting points, not conclusions — validate each against your own prior-art search before assuming open claim space.
Run a white space search in EurekaCommon questions on industrial cooling patents
The leading assignee in this dataset holds 114 of the 2,139 records in scope, with the top five combined holding 483 records, or 22.6% of the field. That leaves a substantial long tail: the top ten combined reach 35.5%, meaning most records belong to assignees outside the ranked leaders. The names at the top are dominated by chemical-treatment and process-technology companies rather than traditional HVAC equipment makers, reflecting how much of this field's claim activity sits in water treatment and fouling control rather than mechanical refrigeration hardware.
Filing moved from 73 records in 2021 to 69 in 2024, a modest 5% decline over the last three-year span that can be treated as complete. The apparent numbers for 2025 and 2026, including a peak of 92 in 2025, should be read cautiously because publication typically lags filing by around 18 months, so recent years are always undercounted at the point of measurement. The honest read is that filing has held roughly steady rather than clearly grown or shrunk over this period.
Water and wastewater treatment (IPC class C02F) leads at 16.5% of the 2,139 records in scope, ahead of refrigeration and heat pumps (F25B) at 13.5% and materials for miscellaneous applications (C09K) at 11.3%. Because a single record can carry several IPC classes, these percentages add up to more than 100% and should be read as claim density per class rather than a breakdown of the field into exclusive segments. The prominence of water-treatment and biocide classes alongside mechanical refrigeration confirms that fouling, scale and corrosion control are core to how this field is actually claimed.
Based on claim density relative to the dominant water-treatment and refrigeration classes, areas like fouling-sensor calibration methods, working-fluid corrosion inhibitors and heat-flux-based fault detection show thinner coverage. These are not guarantees of open claim space — they are starting points for a targeted prior-art search, since a niche can look thin in aggregate IPC counts while still holding dense, specific prior art underneath. Any team considering these areas should validate against a fresh search before drafting.
US20140177673A1, filed by Solenis Technologies, covers a method and sensor apparatus for estimating fouling factor or scale thickness on a heat transfer surface using a heated test cell with two temperature sensors positioned at different distances from the heated surface. It is a representative example of the sensor-and-inference approach to fouling detection that appears repeatedly across the C02F and F28F classes in this dataset. Anyone designing a fouling or scale-monitoring sensor for industrial cooling equipment should review this filing's specific claim structure — particularly the dual-sensor, heated-block geometry — before finalising a similar design.
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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.