PlainPatent

CPC technology class · F24

F24S - Solar HEAT Collectors

Solar heat collectors; solar heat systems. 3,307 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

3,307
US patents granted
F24
Parent CPC class
20
Active assignees
-10%
5-yr velocity

The verdict

Solar HEAT Collectors ranks #304 of 670 CPC technology areas - 3,307 US patents granted since 2015, with filing down 10% over five years.

#304
of 670 CPC technology areas
3,307
US patents granted, 2015–2025
Nextracker
leading assignee (112)
-10%
filing velocity, last 5 yrs
Top assignee: Nextracker Llc (112 patents)

CPC subclass F24S - SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS - covers 3,307 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class F24 (HEATING; RANGES; VENTILATING). See our CPC classification guide for how the system works.

The competitive landscape in F24S is shaped by 20 distinct companies actively filing in this space. Nextracker Llc leads with 112 patents, followed by Sunpower Corporation at 90 grants and Solarcity Corporation at 81.

Filing activity in F24S is down 10% over the past five years versus 2015-2019, a relatively steady filing pace. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is F24S innovation accelerating?

US utility-patent grants per year in F24S, 2015–2025 - recent five years are down 10% versus 2015–2019.

200250300350400 20152016201720182019202020212022202320242025 212

Who leads F24S?

The 12 most active assignees in SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS - wider bars mean more grants

patents

What this shows Nextracker is the most active filer in F24S, holding 112 of the 3,307 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

Source USPTO PatentsView, granted utility patents As of 2015–2025 grant years
View data table
Top patent holders in CPC subclass F24S
Rank Company Patents in F24S
#1 Nextracker Llc 112
#2 Sunpower Corporation 90
#3 Solarcity Corporation 81
#4 Unirac, Inc. 53
#5 OJJO, Inc. 45
#6 Ironridge, Inc. 34
#7 Array Technologies, Inc. 29
#8 Sunmodo Corporation 28
#9 Abengoa Solar New Technologies, S.a. 24
#10 RMH TECH Llc 22
#11 Ecofasten Solar, Llc 22
#12 Sunrun South Llc 21
#13 FTC Solar, Inc. 19
#14 Certainteed Llc 18
#15 Array TECH, Inc. 18
#16 Pegasus Solar Inc 17
#17 Sunrun Inc. 16
#18 Mcalister Technologies, Llc 15
#19 Glasspoint Solar, Inc. 15
#20 Nevados Engineering, Inc. 13

About This Class

CPC subclass F24S belongs to class F24.

3,307 patents were granted in this class between 2015 and 2025.

20 companies actively patent in this space.

Classification System

Cooperative Patent Classification (CPC) is a hierarchical patent classification system used by the USPTO and EPO.

← All Technology Classes Technology Rankings →

Footprint here vs. claim strategy

Each dot is a leading F24S 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 F24S assignees by class footprint. Bubble size = patents in F24S. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 F24S assignees by class footprint. Bubble size = patents in F24S. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 050100150 Patents in F24S Avg claims / patent (company-wide) NextrackerSunpowerSolarcityUniracOjjoIronridgeArraySunmodoAbengoa Solar NewRmh TechEcofasten SolarSunrun SouthFtc SolarCertainteed
Top 14 F24S assignees by class footprint. Bubble size = patents in F24S. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class F24S?
CPC subclass F24S covers SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS. It belongs to CPC class F24 (HEATING; RANGES; VENTILATING), with 3,307 US utility patents granted since 2015.
How many patents have been filed in F24S?
3,307 US utility patents were granted in CPC subclass F24S between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in F24S?
Nextracker Llc leads F24S with 112 patents, making it the most active assignee in this technology area.
How is patent data for F24S collected?
Patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office. It covers all US granted utility patents and assigns CPC codes based on the technology described in each patent.
What is the difference between CPC class and subclass?
A CPC class (e.g., F24) is a broad technology category. Subclasses like F24S provide finer granularity within that category. PlainPatent organizes data at the subclass level (4-character codes) for the most useful view of technology domains.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

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.