CPC technology class · F24

F24T - Geothermal Collectors

Geothermal collectors; geothermal systems. 436 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

436
US patents granted: #6/8
in F24: 1.6%
F24 class share: +56%
5-yr velocity

The verdict

According to USPTO PatentsView, Geothermal Collectors ranks #553 of 670 CPC technology areas - 436 US patents granted since 2015, with recorded grant volume up 56% over five years.

#553
of 670 CPC technology areas: 436
US patents granted, 2015–2025: Ice Thermal Harvesting
leading assignee (30): +56%
grant velocity, last 5 yrs

How F24T's grant cadence moved

Between 2020–2024, F24T recorded 215 grants versus 138 in 2015–2019 (+56% equal-window velocity). Across complete years, output peaked in 2023 at 66 grants and bottomed in 2018 at 20 (+230% peak-over-trough). Lead assignee ICE Thermal Harvesting, LLC holds 6.9% of the class ; the top three share 14.2%.

Leaderboard read

F24T concentration, lead at 6.9%

ICE Thermal Harvesting, LLC leads this historical grant record at 6.9% of F24T - us corporation assignees hold 69% of class grants (113 of 163). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 6.9%
Top three share: 14.2%
Lead over #2: 13

Where F24T sits inside F24

Among 8 subclasses in F24 (HEATING; RANGES; Ventilating), F24T ranks #6 and holds 1.6% of the parent class's 27,261 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

F24F 14,049 F24C 3,868 F24S 3,307 F24H 2,950 F24D 2,041 F24B 409 F24V 201

Rising assignees active in F24T

Company-wide grant multiples (2022–2024 vs 2019–2021) among assignees with ≥5 patents in this subclass. Growth is company-wide; class patent counts are subclass-specific.

#1 ICE Thermal Harvesting, LLC 45x 1 → 45 company-wide · 30 in F24T
#2 EnhancedGEO Holdings, LLC 12x 0 → 12 company-wide · 17 in F24T
#3 Hamfop Technologies LLC 6.00x 0 → 6 company-wide · 6 in F24T
#4 Eavor Technologies Inc. 4.00x 2 → 8 company-wide · 15 in F24T
#5 XGS Energy, Inc. 2.00x 0 → 2 company-wide · 5 in F24T

F24T grants by year, peak 2023 (66)

US utility-patent grants per year in F24T, 2015–2025 - recent five years are up 56% versus 2015–2019.

Ice Thermal Harvesting

30
Enhancedgeo Holdings

17
Eavor

15
Ormat

9
American Piledriving…

6
Hamfop

6
Xgs Energy

5
Mitsubishi Heavy…

4
U S Farathane

4
Fervo Energy

4
Greenfire Energy

4
Guangzhou Institute…

3

What this shows Ice Thermal Harvesting is the most active filer in F24T, holding 30 of the 436 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

View data table

Top patent holders in CPC subclass F24T
Rank	Company	Patents in F24T
#1	ICE Thermal Harvesting, LLC	30
#2	EnhancedGEO Holdings, LLC	17
#3	Eavor Technologies Inc.	15
#4	Ormat Technologies Inc.	9
#5	American Piledriving Equipment, Inc.	6
#6	Hamfop Technologies LLC	6
#7	XGS Energy, Inc.	5
#8	Mitsubishi Heavy Industries Thermal Systems, Ltd.	4
#9	U.S. Farathane Corporation	4
#10	Fervo Energy Company	4
#11	GreenFire Energy Inc.	4
#12	Guangzhou Institute OF Energy Conversion, Chinese Academy OF Sciences	3
#13	E.ON Sverige AB	3
#14	Blade Energy Partners Ltd.	3
#15	Erda Master Ipco Limited	3
#16	CGG Services SAS	2
#17	Osaka City University	2
#18	The Kansai Electric Power Co., Inc.	2
#19	Efficient Energy GMBH	2
#20	Nautilus True, LLC	2

Footprint here vs. claim strategy

Each dot is a leading F24T assignee, placed by how many patents it holds in this class (horizontal) against its company-wide average claims per patent (vertical) - a read on whether the class is led by broad-but-shallow filers or focused deep-claim players.

Top 14 F24T assignees by class footprint. Bubble size = patents in F24T. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Questions about F24T

Which company holds the most patents in F24T?

ICE Thermal Harvesting, LLC leads F24T with 30 patents (6.9% of the subclass). By PatentsView assignee type, us corporations account for 69% of class grants.

Which F24T assignees grew fastest recently?

Among assignees with ≥5 grants in F24T, ICE Thermal Harvesting, LLC shows the highest company-wide grant multiple (45x: 1 grants in 2019–2021 → 45 in 2022–2024) while holding 30 patents in this subclass. Growth is company-wide, not class-only.

How does F24T compare inside parent class F24?

Inside F24 (HEATING; RANGES; Ventilating), F24T ranks #6 of 8 subclasses by grant volume and holds 1.6% of the parent class total. The largest sibling is F24F (14,049 grants).

What to do with this data

F24T in context - here's where to go next.

ICE Thermal Harvesting, LLC leads F24T with 30 grants in this class. See full portfolio
F24T ranks #553 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class F24, the largest sibling subclass is F24F with 14,049 grants. Explore F24F

Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.

Methodology - F24T figures are USPTO PatentsView granted-utility totals for this subclass (436 grants in the tracked window).

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.