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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/waste-heat-recovery-industrial-heat-exchanger-patent-landscape-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Energy Efficiency & Industrial DecarbonizationIndustrial heat exchanger patents: who is filing waste-heat recovery technology, and where the field is still open
17.9K
Published Records
4%
Top-5 Share of All Records
-11%
Filing Growth 2021→2024
CN
Leading Jurisdiction
Filing growth compares 2021 (735 records) with 2024 (655) — 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 17,920 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··6 min readSourced from Patsnap Eureka
Overview
What this landscape covers
Industrial heat exchanger patenting spans equipment design, fouling and cleaning methods, and the process integration that turns waste heat into usable energy or feedwater. The search string behind this dataset pulls 17,920 published records filed or published between 2015 and the 2026 cut-off, drawn from title, abstract and claims mentions of industrial heat exchangers. Because the corpus is built on document publication rather than a fixed technology taxonomy, it mixes core apparatus claims with adjacent process chemistry — separation, water treatment, catalysis — that touches heat exchange without being about the hardware itself.
Publication lags filing by roughly 18 months, so the 2025 and 2026 figures in any trend line are undercounts by construction, not evidence that filing has stopped. Treat family-level counts as the fairer comparison across jurisdictions, since a single invention can generate several publications through continuations or parallel filings in different offices.
Filing activity and technology composition, 2015–2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Waste-Heat Recovery: Industrial Heat Exchanger Patent Landscape covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
The data
Filing trend and technology composition
Two views of the same 17,920-record corpus: how filing volume has moved year over year, and which IPC subclasses carry the claim density.
Filing trend, 2017–2026
Filings rose from 678 in 2017 to a peak of 866 in 2020, then eased to 735 in 2021 and 655 in 2024 — an 11% decline across that three-year window. 2024 is the most recent year with a largely complete publication record; 2025 and 2026 figures will continue to fill in as pending applications publish.
IPC subclass composition
Separation processes (B01D, 14.3% of records) and heat-exchange apparatus (F28D, 13.6%) lead the composition, followed by water and wastewater treatment (C02F, 9.2%) and heat-exchanger detail claims (F28F, 8.8%). Refrigeration and heat pumps (F25B, 8.1%) and steam and thermal power plants (F01K, 7.2%) round out the largest classes, with catalysis-related filings (B01J, 4.5%) the smallest of the group shown. Because records carry multiple classes, these shares are read against the full record total, not against each other.
Shares are the percentage of the 17,920 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Waste-Heat Recovery: Industrial Heat Exchanger Patent Landscape covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Waste-Heat Recovery: Industrial Heat Exchanger Patent Landscape with Eureka
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Representative filing and most-cited prior art
Representative record
Cleaning Industrial Heat Exchangers Through Utilization of Thickness Mode Ultrasonics
GOODSON, J. MICHAEL
Methods and apparatuses for cleaning heat exchangers and heat exchanger components utilizing thickness mode ultrasonics. Heat exchanger components are placed in a tank filled with cleaning media, and one or more thickness mode transducers are operated to clean the tank. Further embodiments integrate transducers within a heat exchanger to clean the heat exchanger space and components located therein.Filed by an individual inventor rather than a corporate assignee — a reminder that fouling-and-cleaning claims in this field are not solely the property of large industrial filers.
Most-cited records in this corpus
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6260407B1 | High-temperature characterization of polymers | 477 |
| 2 | US20030066638A1 | Devices using a medium having a high heat transfer rate | 428 |
| 3 | US20050011278A1 | Process diagnostics | 392 |
| 4 | US20030201098A1 | In situ recovery from a hydrocarbon containing formation using one or more simulations | 310 |
| 5 | US20040020642A1 | In situ recovery from a hydrocarbon containing formation using conductor-in-conduit heat sources with an elec… | 305 |
| 6 | US20030196789A1 | In situ thermal processing of a hydrocarbon containing formation and upgrading of produced fluids prior to fu… | 297 |
| 7 | US20030079877A1 | In situ thermal processing of a relatively impermeable formation in a reducing environment | 297 |
| 8 | US20030146002A1 | Removable heat sources for in situ thermal processing of an oil shale formation | 278 |
| 9 | US20150143806A1 | Quintuple-Effect Generation Multi-Cycle Hybrid Renewable Energy System with Integrated Energy Provisioning, S… | 268 |
| 10 | US20150186483A1 | Systems and methods for dynamically grouping data analysis content | 264 |
Citation counts favour older documents that have had longer to accumulate references; read them as a signal of influence within this searched corpus, not as a ranking of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Waste-Heat Recovery: Industrial Heat Exchanger Patent Landscape covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the numbers mean for a filing or freedom-to-operate decision
Four read-outs from the same dataset, each pointing at a different practical question.
Concentration
4.1%
top 5 of 17,920 records
No single filer controls the field
The leading assignee holds 348 records and the top 5 combined reach only 4.1% of all 17,920 records in scope. Even the tenth-ranked filer sits at 70 records. That spread means freedom-to-operate work has to look past the largest names to the long tail, since no single portfolio dominates claim space here.
Assignee ranking, 100 companies
Filing trend
-11%
2021 → 2024
A plateau, not a collapse
Filings fell from 735 in 2021 to 655 in 2024, an 11% decline, after peaking at 866 in 2020. That is a cooling from the peak rather than a field going quiet — 2025 and 2026 counts are still incomplete due to publication lag and should not be read as continued decline.
2024 is the last complete filing year
Technology mix
14.3% / 4.5%
B01D vs B01J share of records
Separation and apparatus classes dominate
Separation processes (B01D) and heat-exchange apparatus (F28D) each cover around 14% of the 17,920 records, while catalysis-linked filings (B01J) sit at just 4.5%. That gap suggests process-chemistry integration around heat exchange is comparatively under-claimed next to the hardware itself.
Shares sum above 100% because records carry multiple IPC codes
Jurisdictions
5,724
China filings
Filing is concentrated in China, thin at PCT
China receives 5,724 of the tracked filings, more than double the United States at 2,295, with the EPO at 1,554 and WIPO/PCT filings at only 1,233. A filer targeting multiple regions through a single PCT route is still the exception rather than the norm in this field.
Receiving office counts, all records in scope
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to waste-heat recovery: industrial heat exchanger patent landscape, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Waste-Heat Recovery: Industrial Heat Exchanger Patent Landscape covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's next
Where to take this analysis
The dataset points at three practical follow-ups for a team deciding where to file or where to look for freedom to operate.
Map the under-claimed process branches
B01J catalysis-linked filings sit well below the apparatus classes. Before assuming the core heat-exchanger hardware claims are the only ground worth contesting, check whether the process-integration side of waste-heat recovery has room for a first-mover claim.
Explore white space in EurekaTrack the long tail, not just the leader
With the top 5 assignees at only 4.1% of all records, competitive monitoring built around a handful of named companies will miss most of the activity. A search built on claim language rather than assignee name will surface more of the field.
Build a monitoring search in EurekaRecheck the 2024–2026 window as it fills in
The apparent plateau after 2020 is partly a publication-lag artefact. Re-run the trend once 2025 filings finish publishing before concluding the field has genuinely slowed.
Set a filing-trend alert in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Waste-Heat Recovery: Industrial Heat Exchanger Patent Landscape covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions about industrial heat exchanger patents
This dataset contains 17,920 published records in scope for industrial heat exchanger and related waste-heat recovery filings, covering 2015 through a 2026 data cut-off. The count is at the record (publication) level rather than a stricter family count, so continuations and parallel jurisdiction filings for the same invention can each appear separately. Because publication lags filing by roughly 18 months, the most recent one to two years in this total will keep rising as pending applications publish.
The ranking covers 100 companies, and it is genuinely a long tail rather than a concentrated field: the leading assignee holds 348 records, the fifth-ranked holds 82, and the tenth-ranked holds 70. The top 5 assignees combined account for only 4.1% of all 17,920 records, and the top 10 for 6.2%. That means no single company's portfolio defines freedom-to-operate risk here — a competitive review needs to look well past the largest names.
Filings peaked at 866 in 2020, then eased to 735 in 2021 and 655 in 2024, an 11% decline across that three-year span. That reads as a plateau off a strong peak rather than a field losing relevance. The 2025 and 2026 figures in the underlying data are still incomplete because of the roughly 18-month lag between filing and publication, so they should not be used to call a continued downward trend.
Separation processes (B01D) and heat-exchange apparatus (F28D) are the two largest IPC subclasses, each covering roughly 14% of the 17,920 records in scope. Water and wastewater treatment (C02F, 9.2%) and heat-exchanger detail claims (F28F, 8.8%) follow, with refrigeration and heat pumps (F25B) and steam power plants (F01K) also carrying meaningful shares. Catalysis-linked filings (B01J) are comparatively thin at 4.5%, which is worth checking as a possible under-claimed branch before assuming apparatus claims are the only contested ground.
China is by far the largest receiving office with 5,724 filings, more than double the United States at 2,295. Europe (EPO) accounts for 1,554 and WIPO/PCT applications for 1,233, with India at 759 and Australia at 656. The relatively low PCT share suggests many filers are pursuing single-jurisdiction protection rather than routing broad multi-country coverage through a single international application.
Answers are grounded in the same dataset. Derived from a Patsnap search on Waste-Heat Recovery: Industrial Heat Exchanger Patent Landscape covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.