Substation and Heat Interface Units Patents: Leaders & Gaps 2026
Substation and Heat Interface Unit Patents: Who Files, What They Claim
58.5% of all 41 records sit with the top five assignees, but the leader holds just 6 records — concentration without a dominant single filer. Volume rose to a peak of 8 records in 2018, then settled into a lower band. The three-year comparison the dataset supports — 3 records in 2021 against 3 in 2024 — shows 0% growth, not a decline or acceleration; treat any read of 2025-26 as provisional given publication lag.
- 1V UK6
- 2THERMAL INTEGRATION5
- 3SWE THERM UTVECKLINGS5
- 4PASSIV UK LTD4
- 5VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK NV (VITO)4
See the full substation and heat interface units 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 about this patent landscape
Who holds the most patents on heat interface units and district heating substations?
The ranking returned for this scope covers 14 assignees across 41 records, with the leader holding 6 records and fifth place holding 4. No single company dominates: the top five assignees combined hold 58.5% of all 41 records, and the top ten extend that to 90.2%. This means the field is concentrated at the top relative to the long tail, but not controlled by one filer, so competitive monitoring needs to track several accounts rather than one.
Is patent filing activity in this field growing or shrinking?
Filing volume peaked in 2018 at 8 records and has not returned to that level since. The clearest comparable read is 2021 to 2024, where counts held flat at 3 records in each year, a 0% change. Figures for 2025 and 2026 are still incomplete because publication typically lags actual filing by around 18 months, so it is too early to call a trend from the most recent years.
What technology areas do these patents actually claim?
Domestic heating systems, IPC class F24D, appears in 63.4% of the 41 records in scope, making it the dominant claim area. Fluid heaters and water heaters (F24H) and heat-exchange apparatus (F28D) follow at 22.0% and 17.1% respectively. Business and data-processing overlap (G06Q, for metering and billing logic) and power/grid systems (H02J) each stay under 13%, suggesting hardware claims are far more built-out than software or grid-integration claims in this space.
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 Substation and Heat Interface Units 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.