Energy Efficiency Patents: Who Leads, Where the Gaps Are 2026
- 725% filing growth from 2021 to 2024, the fastest complete-year stretch in the dataset, with 2024 as the current peak at 33 records.
- Refrigeration and motor classes lead the field, F25B heat pumps (13.2%) and H02K electric motors (12.9%) outrank grid and materials classes among 325 records in scope.
- The top 5 assignees hold 28.6% of all filings, concentration that thins out fast — the top 10 combined reach 46.2%, leaving a long tail across 100 ranked companies.
Filing growth compares 2021 (4 records) with 2024 (33) — 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 325 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape tracks 325 published records filed against a search construct spanning industrial energy efficiency, electric process heat, low-carbon cement and chemicals, industrial heat pumps, and industrial demand response. The scope deliberately pairs broad decarbonization language with named technical routes, so the corpus mixes hardware claims — heat exchangers, rotary pumps, electric motors — with process and even trading-scheme claims like the featured record below. Publication lags filing by roughly 18 months, so the most recent filing years in any trend understate real activity.
Filings run from 2015 through the 2026 cut-off, with the clearest complete-year signal running to 2024. Receiving-office data shows the United States as the dominant venue, with Europe, the WIPO/PCT route, India, China and Australia trailing at comparable levels — a spread consistent with a technology area still establishing where its strongest claims will hold.
Filing trend and technology composition
Two views of the same 325-record corpus: how filing activity has moved year over year, and which technical classes carry the bulk of the claims.
Filing trend: a sharp, recent acceleration
Annual filings rose from 10 in 2017 to a peak of 33 in 2024, with the sharpest complete-year move being +725% from 2021 (4 records) to 2024 (33 records). 2025 and 2026 figures are still filling in as publications catch up to filing dates, so treat the tail of the chart as a floor, not a ceiling.
Technology composition: refrigeration and motors dominate
F25B (refrigeration and heat pumps) and H02K (electric motors and generators) each cover roughly 13% of the 325 records, followed by G06Q business-process claims at 9.8% and H02J grid/power-supply claims at 8.0%. Because records can carry multiple IPC classes, these shares sum to more than 100% — the mix confirms that hardware for heat and motive power, not software or grid orchestration, carries the largest share of claim density.
Shares are the percentage of the 325 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Energy Efficiency & Industrial Decarbonization Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about energy efficiency & industrial decarbonization patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaA representative record
System, method, and media for trading of energy efficiency (US10438281B2)
A method for reducing greenhouse gas emissions by promoting more efficient energy use: establishing a measure of efficiency as a ratio of energy use to production, setting a reduction schedule with limits on that ratio across compliance periods, and issuing transferable, tradable credits representing energy efficiency improvements that can be sold through a trading system.Filed by Chicago Climate Exchange, Inc.; granted 2019-10-08.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20170341942A1 | Methods and systems for large scale carbon dioxide utilization from lake KIVU via a co2 industrial utilizatio… | 208 |
| 2 | US4758322A | Apparatus for the electrolysis of solutions | 89 |
| 3 | US8551163B2 | Cardiac support systems and methods for chronic use | 79 |
| 4 | US20100282654A1 | Integrated water processing technology | 72 |
| 5 | US4413474A | Mechanical arrangements for Stirling-cycle, reciprocating thermal machines | 66 |
| 6 | US20080231131A1 | Commercial Low Cost, High Efficiency Motor-Generator | 55 |
| 7 | US20150184425A1 | Inline motorized lock drive for solenoid replacement | 54 |
| 8 | US20100131343A1 | System and Method for Segmenting Items in a Shopping Cart by Carbon Footprint | 53 |
| 9 | US20120150291A1 | Cardiac support systems and methods for chronic use | 51 |
| 10 | WO2012047550A1 | Cardiac support systems and methods for chronic use | 49 |
Citation counts favour older filings simply because they have had longer to accumulate citations inside this corpus — read them as a signal of influence, not of current commercial weight.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three findings that hold up against the evidence, without over-reading a partial recent year or a citation count skewed toward older filings.
Growth is real, but concentrated in complete years
Filings moved from 4 in 2021 to 33 in 2024, the fastest complete-year stretch in the dataset. 2025 and 2026 numbers will rise as publication catches up, but they cannot yet be read as a slowdown.
Leadership is present but not dominant
The top 5 assignees combine for 28.6% of all 325 records, and the top 10 reach 46.2%. That leaves more than half the corpus spread across a long tail drawn from 100 ranked companies.
Thermal hardware leads over software and grid claims
F25B refrigeration and heat-pump claims (13.2%) and H02K motor claims (12.9%) each outweigh G06Q business-process claims (9.8%) and H02J grid/power claims (8.0%), pointing to where claim density is actually occupied.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to energy efficiency & industrial decarbonization patent landscape, with the prior art for and against each one.
Who is filing, and how fast
The ranking covers 100 companies as returned by the dataset, not a curated top-50 or top-100 list. Filing counts alone do not show momentum, so recent-year movement matters as much as career totals.
A single leader ahead of a thinning field
The top-ranked assignee holds 22 records, well ahead of the fifth-place holder at 15 and the tenth-place holder at 10 — a gap that narrows quickly past the top few positions.
Recent-year gains are uneven across the leaders
Chemours FC LLC posted 4 records in the latest year at +100% year-over-year, while other named filers show flat or declining recent activity, including one filer down 67% and others reporting zero filings in the latest year.
Co-filing is rare and concentrated in one pair
Only 10 co-assignee pairs appear in the corpus at all. The strongest links one recurring pairing at 14 joint records, with the next strongest pairs in the single digits — collaboration is the exception, not the norm, in this field.
| Assignee | Recent year | YoY |
|---|---|---|
| The Chemours Company FC, LLC | 4 | +100% |
| HEATEN AS | 1 | 0% |
| SKYVEN TECHNOLOGIES LLC | 1 | -67% |
| Redemptive Tech | 0 | — |
| JELLY DROPS LTD | 0 | -100% |
| EVERHEART SYST | 0 | — |
| Sargent Manufacturing Company | 0 | — |
| RINI TECH | 0 | — |
Where to take this next
The figures above establish where claim density sits today. Turning that into a filing or freedom-to-operate decision means running the same questions against live, updated data.
Track the leaders' recent filings
Momentum figures here already show diverging trajectories among the same handful of leading assignees — worth monitoring as 2025-2026 publications continue to land.
Explore assignee activity in Patsnap EurekaMap the under-claimed branches
Thin classes like demand-response scheduling and cement binder chemistry may hold open claim space that the core refrigeration and motor classes no longer do.
Run a white-space search in Patsnap EurekaCheck citation-heavy records against current claims
The most-cited records in this corpus skew older; confirm whether their claims still constrain a specific design before assuming they are still the controlling prior art.
Pull full-text claims in Patsnap EurekaCommon questions on this landscape
The dataset ranks 100 companies by filing count, with the top-ranked assignee holding 22 records, the fifth-place holder 15, and the tenth-place holder 10. The top 5 assignees combined account for 28.6% of all 325 records in scope, and the top 10 reach 46.2%. Beyond that point, the field spreads into a long tail of single- and few-filing entrants, so no single company controls a majority of the claim space.
Filings grew from 4 records in 2021 to 33 in 2024, a +725% increase over that complete-year span, and the overall trend rose from 10 records in 2017 to 22 in 2026 (still partial). 2024 is the most recent year that can be treated as complete because publication typically lags filing by around 18 months. Because of that lag, 2025 and 2026 figures will keep rising as more records publish, so they should not be read as a slowdown.
Refrigeration and heat-pump technology (IPC class F25B) and electric motors and generators (H02K) each cover roughly 13% of the 325 records in scope, the two largest technology shares in the corpus. Business-process claims (G06Q) and power-grid claims (H02J) follow at 9.8% and 8.0% respectively. Because a single record can carry multiple IPC classes, these percentages overlap rather than summing to 100%, but the ranking itself shows hardware for thermal and motive-power applications ahead of software or grid-orchestration claims.
Filing density is uneven: refrigeration, motors and heat-exchange classes are comparatively dense, while sub-areas such as industrial demand-response scheduling, low-carbon cement binder chemistry and waste-heat-to-power integration show thinner coverage relative to the core classes. High density in the core classes signals that claim space there is occupied, not that the underlying technology is mature or exhausted. A freedom-to-operate review of the thinner sub-areas is more likely to surface open claim positions than a search confined to the top classes.
US10438281B2, assigned to Chicago Climate Exchange, Inc. and granted in 2019, claims a method and system for issuing and trading energy-efficiency credits based on a ratio of energy use to production against a compliance schedule. It is a trading-scheme and credit-instrument patent, not a hardware or process patent, so it constrains market-mechanism implementations for efficiency credits rather than physical equipment like heat pumps or motors. Anyone building a credit-trading platform for industrial energy efficiency should review its claims closely; anyone working purely on hardware or process chemistry is unlikely to be blocked by it.
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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.