Geothermal Energy Systems Patents: Who Leads, Trends 2026
- Filing peaked in 2024 at 38 families, then the trend flattens rather than climbing — this is not a market still accelerating on the numbers alone.
- No single assignee anchors the field; the strongest co-filing cluster is an individual-inventor group (Pearson, Pate, Lines, El-Rabaa), not a corporate lab, and its momentum has gone to -100% YoY.
- F03G and E21B claims sit underneath most F24T filings, meaning drilling and mechanical-conversion art is doing as much of the claiming work as the geothermal-specific subclass itself.
What the filings cover and where they sit
Geothermal energy systems patenting in this dataset spans 202 patent families filed between 2017 and mid-2026, concentrated around borehole heat exchangers, enhanced geothermal systems, reservoir stimulation, binary cycle conversion, and scaling and corrosion control. The core IPC subclass, F24T, appears in 152 records, but F03G (spring/weight and miscellaneous motors, covering much of the mechanical energy-conversion art) sits close behind at 125, and E21B earth and rock drilling appears in 72 — a reminder that a geothermal claim rarely stands alone on subsurface novelty; it usually leans on drilling or conversion hardware that is claimed elsewhere too.
Filing activity is not evenly spread across jurisdictions. The United States receives the largest share of filings by a wide margin, with WIPO PCT filings, Canada, Europe and China each taking a smaller but active share — a pattern consistent with a technology still being protected market-by-market rather than through a single dominant multinational filing programme.
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Filing trend and technology composition
Publication figures for the most recent year are always understated because filing precedes publication by roughly 18 months; treat 2025 and 2026 as partial.
Filings by year
Filings rose from 12 in 2017 to a peak of 38 in 2024, passing through 35 at the 2022 midpoint. The flat-to-declining shape after the peak suggests the field is consolidating around known approaches rather than expanding into new claim territory, though the true 2025-2026 count will rise somewhat as later publications land.
IPC subclass distribution
F24T (geothermal systems specific) leads at 152 records, with F03G (125) and E21B drilling (72) close behind, and smaller counts in F28D heat exchangers, F24J, F01K steam plants, F22B boilers and G21D nuclear — the last suggesting some cross-filing with hybrid or co-located generation concepts.
Shares are the percentage of the 202 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Geothermal Energy Systems with Eureka
This page is one run against one query. Ask Eureka your own question about geothermal energy systems and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited prior art and a representative recent filing
Monitoring and managing a geothermal energy system
A geothermal management system may receive time-series data for operation of the geothermal energy system, calibrate a physical model using that data, apply the model to a pre-determined comparison parameter to generate a performance indicator, and identify an operating status of the system based on that indicator.Filed by Schlumberger Technology Corporation, published 2025-06-26 — illustrative of a shift toward software-layer monitoring and diagnostics claims sitting on top of established hardware.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20180224164A1 | Self-contained in-ground geothermal generator and heat exchanger with in-line pump used in several alternativ… | 93 |
| 2 | US20090126923A1 | Closed loop energy production from geothermal reservoirs | 81 |
| 3 | US8708046B2 | Closed loop energy production from geothermal reservoirs | 75 |
| 4 | US20200191444A1 | Enhancing Geothermal Energy Production in a Well | 48 |
| 5 | CN108302833A | 封闭式深层地热能采集系统和方法 | 33 |
| 6 | US11131484B2 | Geothermal energy collection system | 26 |
| 7 | US20230114197A1 | Optimized CO2 Sequestration and Enhanced Geothermal System | 24 |
| 8 | US20130055714A1 | Self-contained in-ground geothermal generator and heat exchanger with in-line pump | 24 |
| 9 | US20110247328A1 | Power generation system | 20 |
| 10 | US11656002B2 | Enhancing geothermal energy production in a well | 19 |
Citation counts favour older filings that have had more time to accumulate citations within the searched corpus; read them as a signal of influence on the field, not of current commercial importance.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the filing pattern tells you
Three findings shape how a freedom-to-operate or whitespace review should be scoped in this field.
Growth has flattened, not accelerated
The climb from 12 filings in 2017 to 35 at the 2022 midpoint and 38 at the 2024 peak looks like steady growth, but the years since do not extend that curve. Combined with the 18-month publication lag, the honest read is a field that grew through the early 2020s and has since plateaued rather than one still scaling.
No corporate anchor tenant
The strongest collaboration signal in the data is an individual-inventor cluster — Pearson, Pate, Lines and El-Rabaa co-filing repeatedly — rather than a single company building a defensive thicket. Schlumberger appears with a recent representative filing, but the ranking as a whole reads as fragmented.
Drilling and conversion hardware carry real claim weight
F24T is the largest single subclass but far from a majority of the corpus once F03G and E21B are counted. Any clearance search limited to geothermal-specific classifications alone would miss most of the drilling and mechanical-conversion prior art actually blocking new claims.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to geothermal energy systems, with the prior art for and against each one.
Who is filing, and where momentum has gone quiet
Recent-year momentum figures show a field where the most active historical filers have gone to zero filings in the latest year — a sign of either project completion, portfolio maturity, or a pause ahead of new activity yet to publish.
Pearson Mansell, Pate Bradley and collaborators
This group anchors the strongest co-assignee pairs in the dataset (11 and 9 shared filings) but shows zero filings in the latest year and a -100% year-on-year change, consistent with a completed filing programme rather than an active one.
Schlumberger Technology Corporation
The representative recent filing in this dataset comes from Schlumberger, covering monitoring and management software layered on geothermal operations — a different claim strategy from the hardware-heavy earlier filings dominating the corpus.
Colorado School of Mines
Listed in the recent-momentum data with one filing in the latest year, this is one of the few entries in the ranking still showing active filing rather than a drop to zero.
| Assignee | Recent year | YoY |
|---|---|---|
| Colorado School of Mines | 1 | — |
| GEOTHERMAL TECH | 0 | — |
| PEARSON ROBERT MANSELL | 0 | -100% |
| PATE CARL BRADLEY | 0 | -100% |
| STOIC TRANSITIONAL RESOURCES INC | 0 | -100% |
| Terrak Co., Ltd. | 0 | — |
| LINES TIMOTHY DAVID GRAY HILLESDEN | 0 | -100% |
| LAKIC NIKOLA | 0 | — |
Turning this landscape into a filing or clearance decision
A landscape page tells you the shape of the field; deciding where to file or challenge needs the individual claims read against your own concept.
Check claim-level overlap before drafting
The IPC breakdown shows drilling and conversion subclasses carrying real claim weight alongside geothermal-specific classifications — a clearance search scoped to F24T alone will miss relevant prior art in F03G and E21B.
Run a claim comparison in EurekaWatch the assignees that went quiet
Several of the most co-active filers show -100% year-on-year momentum; that can mean a lapsed programme or simply unpublished recent filings still in the pipeline.
Track assignee activity in EurekaRead the white space against your own roadmap
Branches like scaling-corrosion chemistry and reservoir-monitoring software show thinner claim density than the core hardware categories, which is where a first-mover claim is more likely to stand.
Explore white space in EurekaCommon questions about geothermal energy systems patents
This dataset does not show one dominant corporate assignee. The strongest filing relationships belong to an individual-inventor cluster (Pearson Mansell, Pate Bradley and collaborators) with 10 co-assignee pairs recorded between them, while companies like Schlumberger appear with more recent, individual filings rather than a large historical block. Because ownership is fragmented across many small filers, checking freedom-to-operate here means reviewing individual records rather than clearing against a handful of large portfolios.
Filings rose from 12 in 2017 to a peak of 38 in 2024, passing through 35 at the 2022 midpoint, and the years after the peak do not extend that growth. Because publication typically lags filing by around 18 months, the 2025 and 2026 figures in any dataset will always look lower than the true filing rate until later publications catch up. Read as of today, the trend looks flat to declining rather than accelerating.
The IPC composition shows F24T (geothermal systems) as the largest single subclass at 152 records, but F03G (spring/weight and miscellaneous motors, covering mechanical energy conversion) is close behind at 125, and E21B earth and rock drilling appears in 72 records. Smaller counts sit in heat exchangers (F28D), steam and thermal power plants (F01K), boilers (F22B) and even nuclear power plants (G21D), suggesting some filings address hybrid or co-located generation. A search limited only to F24T will miss a large share of relevant prior art.
The United States receives the largest number of filings in this dataset at 83, followed by WIPO PCT filings at 28, Canada at 19, Europe (EPO) at 17, China at 13 and Australia at 9. This distribution points to a technology being protected market-by-market through national and regional offices rather than concentrated behind a single dominant multinational filing strategy.
The highest-cited records address closed-loop energy production from geothermal reservoirs and self-contained in-ground geothermal generators with integrated heat exchangers and pumps, alongside more recent filings on enhancing geothermal energy production in an existing well. These records accumulate citations partly because they are older and have had more time to be cited within the searched corpus, so treat the citation count as a measure of influence on later filings rather than a signal of which patents matter most today.
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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.