PlainPatent

CPC technology class · F23

F23R - Generating Combustion Products OF HIGH Pressure OR HIGH V…

Generating combustion products of high pressure or high velocity, e.g. gas-turbine combustion chambers. 4,138 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

4,138
US patents granted
F23
Parent CPC class
20
Active assignees
+18%
5-yr velocity

The verdict

Generating Combustion Products OF HIGH Pressure OR HIGH V… ranks #267 of 670 CPC technology areas - 4,138 US patents granted since 2015, with filing up 18% over five years.

#267
of 670 CPC technology areas
4,138
US patents granted, 2015–2025
General Electric
leading assignee (1,090)
+18%
filing velocity, last 5 yrs
Top assignee: General Electric Company (1,090 patents)

CPC subclass F23R - GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS - covers 4,138 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class F23 (COMBUSTION APPARATUS; COMBUSTION PROCESSES). See our CPC classification guide for how the system works.

The competitive landscape in F23R is shaped by 20 distinct companies actively filing in this space. General Electric Company leads with 1,090 patents, followed by United Technologies Corporation at 335 grants and Raytheon Technologies Corporation at 246.

Filing activity in F23R is up 18% 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 F23R innovation accelerating?

US utility-patent grants per year in F23R, 2015–2025 - recent five years are up 18% versus 2015–2019.

200300400500600 20152016201720182019202020212022202320242025 239

Who leads F23R?

The 12 most active assignees in GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS - wider bars mean more grants

patents

What this shows General Electric is the most active filer in F23R, holding 1,090 of the 4,138 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 F23R
Rank Company Patents in F23R
#1 General Electric Company 1,090
#2 United Technologies Corporation 335
#3 Raytheon Technologies Corporation 246
#4 Rolls-royce Plc 170
#5 Pratt & Whitney Canada Corp. 145
#6 RTX Corporation 108
#7 Delavan Inc. 100
#8 Mitsubishi Hitachi Power Systems, Ltd. 97
#9 Ansaldo Energia Switzerland Ag 97
#10 Siemens Energy, Inc. 84
#11 Rolls-royce Corporation 79
#12 Safran Aircraft Engines 76
#13 Rolls-royce Deutschland Ltd & Co KG 70
#14 Collins Engine Nozzles, Inc. 65
#15 Rolls-royce North American Technologies Inc. 59
#16 Siemens Energy Global Gmbh & Co. KG 58
#17 Doosan Enerbility Co., Ltd. 49
#18 Solar Turbines Incorporated 44
#19 Snecma 38
#20 Alstom Technology Ltd 36

About This Class

CPC subclass F23R belongs to class F23.

4,138 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 F23R 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 F23R assignees by class footprint. Bubble size = patents in F23R. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 F23R assignees by class footprint. Bubble size = patents in F23R. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 81012141618 050010001500 Patents in F23R Avg claims / patent (company-wide) General ElectricUnitedRaytheonRolls-roycePratt & Whitney CanadaRtxDelavanMitsubishi Hitachi Po…Ansaldo Energia Switz…Siemens EnergyRolls-royceSafran Aircraft Engin…Rolls-royce Deutschla…Collins Engine Nozzles
Top 14 F23R assignees by class footprint. Bubble size = patents in F23R. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class F23R?
CPC subclass F23R covers GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS. It belongs to CPC class F23 (COMBUSTION APPARATUS; COMBUSTION PROCESSES), with 4,138 US utility patents granted since 2015.
How many patents have been filed in F23R?
4,138 US utility patents were granted in CPC subclass F23R between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in F23R?
General Electric Company leads F23R with 1,090 patents, making it the most active assignee in this technology area.
How is patent data for F23R 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., F23) is a broad technology category. Subclasses like F23R 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.