F02C 9/18
By bleeding, bypassing or acting on variable working fluid interconnections between turbines
Official title: by bleeding, bypassing or acting on variable working fluid interconnections between turbines or compressors or their stages {(F02C3/113 takes precedence)}
F02C9/18 (By bleeding, bypassing or acting on variable working fluid interconnections between turbines) appears on 1,441 US grants and 1,638 published applications in this corpus.
Search patents in F02C- Granted patents
- 1,441
- Published applications
- 1,638
- Assignees
- 236
- Inventors
- 2,673
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 6 | 0 |
| 1992 | 11 | 0 |
| 1993 | 7 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 7 | 0 |
| 2000 | 7 | 0 |
| 2001 | 5 | 2 |
| 2002 | 10 | 10 |
| 2003 | 11 | 7 |
| 2004 | 6 | 13 |
| 2005 | 12 | 15 |
| 2006 | 9 | 15 |
| 2007 | 5 | 17 |
| 2008 | 7 | 19 |
| 2009 | 13 | 20 |
| 2010 | 11 | 41 |
| 2011 | 19 | 33 |
| 2012 | 24 | 36 |
| 2013 | 28 | 70 |
| 2014 | 37 | 60 |
| 2015 | 46 | 94 |
| 2016 | 46 | 147 |
| 2017 | 71 | 155 |
| 2018 | 105 | 147 |
| 2019 | 129 | 130 |
| 2020 | 148 | 142 |
| 2021 | 123 | 88 |
| 2022 | 122 | 76 |
| 2023 | 118 | 80 |
| 2024 | 83 | 60 |
| 2025 | 90 | 93 |
| 2026 | 67 | 68 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- Gas turbine engine having cooling systems8 Oct 2026US 2026/0309082 A1General Electric Company
- Propulsion and electrical system for an aircraft including a fuel cell and a turbine engine1 Oct 2026US 2026/0296655 A1GE AVIO S.r.I.
- Turbofan engine converted from producing thrust power to producing shaft power and corresponding method1 Oct 2026US 2026/0298135 A1TJet Holdings Inc.
- Inter-flowpath structure with air circuit(s) for aircraft propulsion system1 Oct 2026US 2026/0298139 A1Rtx Corporation
Most cited
By later US patents
- 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
- Controller assembly for simultaneously managing multiple engine/pump assemblies to perform shared work171US 10,415,557 B1Tucson Embedded Systems, Inc. · 2019