Thermal Bridge Mitigation Patents: Top Companies & Filing Trends 2026
Filing growth compares 2021 (589 records) with 2024 (413) — 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 12,708 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Thermal bridge mitigation spans everything from structural thermal break strips in curtain wall construction to vacuum insulation panels in refrigeration. The search captures patent families that explicitly address heat transfer across building structures, glazing, roofing, piping and layered insulation products, filed or published between 2015 and mid-2026.
The dataset spans 12,708 published records across multiple receiving offices, with the United States, the European Patent Office and WIPO's PCT route accounting for the largest shares of filings. That spread signals a field pursued through multiple jurisdictions rather than one dominated by a single national filing strategy.
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Filing trends and technology composition
Two views of the same 12,708-record dataset: how filing volume has moved year over year, and which building-envelope subdomains carry the claim density.
Filing trend, 2017-2026
Filings rose from 557 in 2017 to a peak of 676 in 2020, then eased to 413 by 2024 — a 30% decline over the 2021-2024 span. Treat 2025 and 2026 figures as partial; publication lag means recent filings are still being published.
IPC subclass composition
E04B (building structures & elements) appears in 32.1% of records and E04C (structural building components) in 16.4%, making structural envelope claims the largest share. Window and door systems (E06B, 12.0%), pipe insulation (F16L, 8.0%) and layered laminates (B32B, 6.5%) form the next tier — since records can carry multiple IPC codes, these shares sum to more than 100%.
Shares are the percentage of the 12,708 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Building Envelope & Efficiency: Thermal Bridge Mitigation Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about building envelope & efficiency: thermal bridge mitigation patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaA representative filing and the most-cited prior art
Structure for blocking heat transfer through thermal bridge of curtain wall building (US20170298620A1)
Discloses a curtain-wall assembly using an integral thermal break strip made from an aerogel insulation blanket, fixed between the indoor metal frame and the curtain wall and/or outdoor metal frame or components. The design targets simple construction, high structural strength, fireproofing and reduced comprehensive construction cost alongside improved energy performance.Filed by YU, WEIPING, published 2017-10-19.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6095083A | Vacuum processing chamber having multi-mode access | 538 |
| 2 | KR1020150012712A | Vacuum heat insulating material and refrigerator including same | 501 |
| 3 | US20080134589A1 | System for modular building construction | 366 |
| 4 | US4641468A | Panel structure and building structure made therefrom | 245 |
| 5 | US5862866A | Double walled insulated tubing and method of installing same | 244 |
| 6 | US6125608A | Composite insulated framing members and envelope extension system for buildings | 243 |
| 7 | US9272475B2 | Thermally insulated VIP sandwich shipper and method of making same | 238 |
| 8 | US5158132A | Zone-regulated high-temperature electric-heating system for the manufacture of products made from composite m… | 221 |
| 9 | US7827738B2 | System for modular building construction | 215 |
| 10 | EP1600351A1 | Method and system for detecting defects and hazardous conditions in passing rail vehicles | 215 |
Citation counts favour older filings that have had more time to accumulate citations within this corpus — read them as markers of influence on the field, not of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Reading filing volume, citation weight and IPC spread together points to a field with occupied structural claim space but open ground in mechanical and materials sub-branches.
Leadership is thin, not dominant
The leading assignee holds 234 records and the fifth-place holder 130, but combined the top five account for only 7.4% of all records in scope. That is a fragmented field: no single company's portfolio forces a design-around for the whole market.
Volume has cooled from its 2020 peak
Filings peaked at 676 in 2020 and fell to 413 by 2024, a complete-year decline of 30%. Recent-year assignee momentum data shows several leading filers at zero or near-zero in the latest year, consistent with a maturing rather than accelerating filing cycle.
Structural envelope claims dominate the mix
E04B and E04C together cover the bulk of structural building-element claims, while F25D (refrigeration) sits at only 5.0%. Most inventive activity documented here targets the building envelope itself rather than appliance-level thermal bridging.
Cross-filing is rare and concentrated
Only 10 co-assignee pairs appear in the dataset, and the strongest pair shares 94 families between related corporate entities. Most assignees file independently, which limits opportunities to trace joint development programmes through co-ownership alone.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to building envelope & efficiency: thermal bridge mitigation patent landscape, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| IG Tech Research Inc. | IG TECH RES INC | 94 |
| Nicoventures Trading Ltd. | British American Tobacco (Investments) Ltd. | 16 |
| Rockwool International A/S | Deutsche Rockwool Mineralwoll GmbH | 15 |
| Kingspan Holdings (IRL) Ltd. | ROCHEFORT MALCOLM | 6 |
| Kingspan Holdings (IRL) Ltd. | PARGETER ADRIAN | 6 |
| Saint-Gobain Vitrage SA | SALVAIRE LAURENT | 5 |
| Rockwool International A/S | THORSTED MICHAEL A | 4 |
| Rockwool International A/S | HESSELHOLT PETER | 4 |
With only 10 identified co-assignee pairs across the dataset, most portfolios in this landscape were built through independent filing rather than joint development.
Where to take this analysis
The dataset points to specific next steps for teams deciding where to file or where to watch.
Map claims against the under-claimed branches
Cross-reference a candidate invention against the gate chips above — vacuum insulation edge seals, refrigeration hardware and retrofit kits show thinner coverage than core E04B structural claims.
Explore white space in EurekaTrack the leading assignees' next filings
With several top filers showing flat or declining latest-year activity, watching their next 12-18 months of publications will clarify whether the 2024 slowdown is a lag artefact or a real pullback.
Set up assignee monitoring in EurekaCommon questions about thermal bridge mitigation patents
In this dataset it means any patent family whose claims address heat transfer across a discontinuity in a building envelope or insulated system — curtain wall frames, window and door assemblies, roofing junctions, pipe penetrations and layered insulation products. The search combines the phrase "thermal bridge mitigation" with related terms like thermal bridging, break, insulation and mitigation. It spans structural building classes (E04B, E04C) through to refrigeration insulation (F25D), so the term covers a broader set of applications than construction alone.
The leading assignee holds 234 records in a ranking of 100 companies, with the fifth-place holder at 130 and the tenth at 83. Combined, the top 5 assignees account for only 7.4% of the 12,708 records in scope, and the top 10 for 11.0% — this is a fragmented field with a long tail of smaller filers rather than one dominated by a handful of incumbents. That means competitive risk is spread thin rather than concentrated in one or two portfolios.
Filings rose from 557 in 2017 to a peak of 676 in 2020, then declined to 413 by 2024 — a 30% drop over that three-year span, which is the most recent period with complete data. Figures for 2025 and 2026 appear lower still, but that reflects publication lag of roughly 18 months rather than a real collapse in filing. The honest read is a field past its 2020 peak, cooling into 2024, with 2025-2026 too incomplete to call a trend.
E04B (building structures & elements) appears in 32.1% of the 12,708 records, and E04C (structural building components) in 16.4%, making these the most densely claimed areas. Window and door systems (E06B) sit at 12.0%, pipe fittings (F16L) at 8.0%, and refrigeration (F25D) trails at 5.0%. Because a single patent can carry multiple IPC codes, these percentages overlap and should be read as density signals rather than a breakdown that sums to 100%.
Refrigeration-adjacent hardware, retrofit-oriented thermal break kits for existing buildings, and vacuum-insulation edge-seal design all sit outside the dense E04B/E04C structural claim territory and show thinner coverage in this dataset. Co-assignee activity is also sparse, with only 10 identified pairs across the whole dataset, suggesting most invention here happens inside single organisations rather than through joint filings. A first claim in one of the thinner branches has a better chance of clearing prior art than one competing directly in curtain wall structural claims.
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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.