Brazed Compact Heat Exchanger Patents: Who Leads, Gaps 2026
Brazed and Welded Compact Heat Exchangers Patents: filings, leaders and open claim space
Filing has fallen sharply since the 2021 peak. the leading assignee's activity dropped -90% between 2021 (29 filings) and 2024 (3), the last complete year in the dataset. Filings built up to a peak of 29 in 2021, then fell to 3 by 2024 — a -90% move over that three-year span. Because the 2025 and 2026 figures are still filling in under publication lag, this should be read as a real pullback from a filing wave rather than as a technology going quiet from today's vantage point.
- 1鲁姆斯科技公司40
- 2环球油品公司21
- 3可持续发动机系统有限公司5
- 4JOSEPH STEPHEN DAVID3
- 5HISLOP DRUMMOND WATSON3
See the full brazed and welded compact heat exchangers 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 on this landscape
Who are the leading patent holders in brazed and welded compact heat exchangers?
The assignee ranking for this dataset contains seven companies, and it is a short, concentrated list rather than a broad industry field. The top assignee holds 40 family records, far ahead of the fifth-place company at 3. Because the ranking is the entire list the data endpoint returns, it should be read as who has filed detectably in this specific claim space, not as a complete map of every manufacturer active in compact heat exchangers generally.
Is patent filing in this area growing or slowing down?
Filing peaked at 29 records in 2021 and had fallen to 3 by 2024, a -90% drop over that span, which is the last year in this dataset that can be treated as complete. Publication typically lags actual filing by around 18 months, so 2025 and 2026 figures are still filling in and should not be read as continued decline. On the evidence available, the honest read is that a filing wave crested in 2021 and had largely subsided by 2024.
What technology areas are most claimed within compact heat exchangers?
IPC classes F28F (heat-exchanger details) and F28D (heat-exchange apparatus) each cover close to two-thirds of the 71 records in scope, with F02C (gas-turbine plants) at 46.5%. These figures overlap because a single record can carry multiple classes, so they add to more than 100% together. Classes tied to the actual joining process, B23K for welding, soldering and brazing, appear in only 11.3% of records, indicating exchanger geometry and system integration are far more heavily claimed than the brazing process itself.
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 Brazed and Welded Compact Heat Exchangers 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.