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 grant trajectory.

4,138
US patents granted
#1/12
in F23
27.1%
F23 class share
+5%
5-yr velocity

The verdict

According to USPTO PatentsView, Generating Combustion Products Of High Pressure Or High V… ranks #267 of 670 CPC technology areas - 4,138 US patents granted since 2015, with recorded grant volume up 5% over five years.

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

How tightly F23R concentrates

General Electric Company holds 26.3% of F23R's recorded grants (1,090 of 4,138) - 755 more than United Technologies Corporation. Across complete PatentsView years, the class peaked in 2020 at 511 grants and bottomed in 2017 at 288 (+77% peak-over-trough). Equal-window velocity 2020–2024 vs 2015–2019: +5% (1,945 vs 1,844 grants).

Leaderboard read

F23R concentration, lead at 26.3%

General Electric Company leads this historical grant record at 26.3% of F23R - us corporation assignees hold 68% of class grants (2,411 of 3,534). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
26.3%

1,090 of 4,138 grants

Top three share
40.4%

of the class's recorded grants

Lead over #2
755

more grants than United Technologies Corporation

Where F23R sits inside F23

Among 12 subclasses in F23 (Combustion APPARATUS; Combustion Processes), F23R ranks #1 and holds 27.1% of the parent class's 15,279 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

F23D 2,623 F23N 1,763 F23C 1,571 F23J 1,082 F23G 1,073 F23L 922 F23K 754 F23M 568

Rising assignees active in F23R

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. #1 RTX Corporation 662x 0 → 662 company-wide · 108 in F23R
  2. #2 Doosan Enerbility Co., Ltd. 121x 0 → 121 company-wide · 49 in F23R
  3. #3 GE Infrastructure Technology LLC 80x 2 → 160 company-wide · 32 in F23R
  4. #4 Collins Engine Nozzles, Inc. 74x 0 → 74 company-wide · 65 in F23R
  5. #5 Siemens Energy Global GmbH & Co. KG 4.31x 104 → 448 company-wide · 58 in F23R

F23R grants by year, peak 2020 (511)

US utility-patent grants per year in F23R, 2015–2025 - recent five years are up 5% 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

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). 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…Ansaldo Energia…Siemens EnergyRolls-royceSafran Aircraft…Rolls-royce Deutschlan…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).

Classes near F23R's 4,138-grant footprint

Nationwide nearest neighbors for F23R (#267 of 670 by volume ; lead share 26.3%) - not the F23 parent-class siblings above.

Nearest by grant volume

F01P 4,129 F01L 4,152 B62J 4,111 F17C 4,101

Nearest by lead-assignee share

A01H 25.9% D06F 25.6% G04R 25.0% A63G 25.0%

Questions about F23R

Which company holds the most patents in F23R?
General Electric Company leads F23R with 1,090 patents (26.3% of the subclass). By PatentsView assignee type, us corporations account for 68% of class grants.
Which F23R assignees grew fastest recently?
Among assignees with ≥5 grants in F23R, RTX Corporation shows the highest company-wide grant multiple (662x: 0 grants in 2019–2021 → 662 in 2022–2024) while holding 108 patents in this subclass. Growth is company-wide, not class-only.
How does F23R compare inside parent class F23?
Inside F23 (Combustion APPARATUS; Combustion Processes), F23R ranks #1 of 12 subclasses by grant volume and holds 27.1% of the parent class total. The largest sibling is F23D (2,623 grants).

What to do with this data

F23R in context - here's where to go next.

  • General Electric Company leads F23R with 1,090 grants in this class. See full portfolio
  • F23R ranks #267 of 670 by grant volume among all tracked CPC technology areas. See the ranking
  • Inside parent class F23, the largest sibling subclass is F23D with 2,623 grants. Explore F23D

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

Methodology - F23R figures are USPTO PatentsView granted-utility totals for this subclass (4,138 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.