F02C 9/16
Control of working fluid flow
Official title: Control of working fluid flow (F02C9/48 takes precedence; control of air-intake flow F02C7/057)
F02C9/16 (Control of working fluid flow) appears on 2,212 US grants and 2,460 published applications in this corpus.
Search patents in F02C- Granted patents
- 2,212
- Published applications
- 2,460
- Assignees
- 341
- Inventors
- 3,972
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 6 | 0 |
| 1980 | 8 | 0 |
| 1981 | 11 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 9 | 0 |
| 1988 | 10 | 0 |
| 1989 | 9 | 0 |
| 1990 | 7 | 0 |
| 1991 | 11 | 0 |
| 1992 | 15 | 0 |
| 1993 | 11 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 8 | 0 |
| 1999 | 10 | 0 |
| 2000 | 9 | 0 |
| 2001 | 11 | 4 |
| 2002 | 12 | 11 |
| 2003 | 16 | 16 |
| 2004 | 13 | 20 |
| 2005 | 20 | 24 |
| 2006 | 16 | 22 |
| 2007 | 8 | 29 |
| 2008 | 12 | 26 |
| 2009 | 16 | 43 |
| 2010 | 20 | 64 |
| 2011 | 29 | 56 |
| 2012 | 42 | 61 |
| 2013 | 40 | 120 |
| 2014 | 61 | 95 |
| 2015 | 77 | 149 |
| 2016 | 78 | 214 |
| 2017 | 118 | 206 |
| 2018 | 160 | 210 |
| 2019 | 186 | 182 |
| 2020 | 219 | 215 |
| 2021 | 174 | 157 |
| 2022 | 194 | 116 |
| 2023 | 167 | 121 |
| 2024 | 136 | 92 |
| 2025 | 121 | 117 |
| 2026 | 83 | 90 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air bleed slots for gas turbine engines6 Oct 2026US 12,753,725 B1Pratt & Whitney Canada Corp.
- System and method for gas turbine engine rotor bow mitigation29 Sep 2026US 12,747,702 B2Rtx Corporation
- Fluid injection system and method for mitigating rotating stall in turbine engine29 Sep 2026US 12,747,705 B2GE Vernova Infrastructure Technology LLC
- Buffer air assembly for an aircraft engine22 Sep 2026US 12,742,413 B2Rtx Corporation
- Turbine engine including an air turbine starter and a bleed air circuit22 Sep 2026US 12,742,422 B2Unison Industries, LLC
- Variable bleed valve assemblies8 Oct 2026US 2026/0309077 A1General Electric Company
- System and method for controlling contrail formation8 Oct 2026US 2026/0309079 A1Rtx Corporation
- Gas turbine engine having cooling systems8 Oct 2026US 2026/0309082 A1General Electric Company
- Gas turbine propulsion system with variable pitch fan and method for operating the system8 Oct 2026US 2026/0309094 A1Rtx Corporation
- Propulsion and electrical system for an aircraft including a fuel cell and a turbine engine1 Oct 2026US 2026/0296655 A1GE AVIO S.r.I.
Most cited
By later US patents
- Method and system of controlling a jet engine for avoiding engine surge341US 4,130,872 AThe United States of America as represented by the Secretary of the Air Force · 1978
- Synthesis gas production system and method299US 6,085,512 ASyntroleum Corporation · 2000
- Dual orifice bypass system for dual-fuel gas turbine181US 6,145,318 AGeneral Electric Company · 2000
- Multi-compatible digital engine controller179US 9,429,078 B1Tucson Embedded Systems, Inc. · 2016
- Gas turbine engine overspeed prevention178US 9,689,316 B1Tucson Embedded Systems, Inc. · 2017