F02C 3/067
Having counter-rotating rotors
Official title: having counter-rotating rotors (F02C3/073 takes precedence)
F02C3/067 (Having counter-rotating rotors) appears on 241 US grants and 238 published applications in this corpus.
Search patents in F02C- Granted patents
- 241
- Published applications
- 238
- Assignees
- 47
- Inventors
- 318
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 5 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 0 |
| 2002 | 5 | 1 |
| 2003 | 4 | 4 |
| 2004 | 8 | 6 |
| 2005 | 0 | 5 |
| 2006 | 1 | 13 |
| 2007 | 8 | 8 |
| 2008 | 5 | 6 |
| 2009 | 6 | 10 |
| 2010 | 6 | 9 |
| 2011 | 5 | 3 |
| 2012 | 8 | 4 |
| 2013 | 3 | 15 |
| 2014 | 5 | 11 |
| 2015 | 9 | 11 |
| 2016 | 7 | 13 |
| 2017 | 9 | 3 |
| 2018 | 10 | 17 |
| 2019 | 15 | 22 |
| 2020 | 24 | 16 |
| 2021 | 14 | 14 |
| 2022 | 18 | 13 |
| 2023 | 13 | 14 |
| 2024 | 12 | 9 |
| 2025 | 10 | 4 |
| 2026 | 3 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dual bypass turbofan gas turbine engine9 Jun 2026US 12,650,091 B2Pratt & Whitney Canada Corp.
- Overall engine efficiency rating for turbomachine engines12 May 2026US 12,624,662 B2GE Avio S. r. l.
- Unducted propulsion system7 Apr 2026US 12,595,760 B2General Electric Company
- Architecture of a turbomachine with counter-rotating turbine23 Dec 2025US 12,503,976 B2Safran Aircraft Engines
- Counter-rotating turbine16 Dec 2025US 12,497,917 B2GE Avio S. r. l.
- Unducted propulsion system30 Jul 2026US 2026/0218650 A1General Electric Company
- Hybrid aircraft propulsion system23 Jul 2026US 2026/0210264 A1Rtx Corporation
- Symmetric Open Propulsor Rotating Patterns for Aircraft16 Jul 2026US 2026/0200580 A1Rtx Corporation
- Symmetric Open Propulsor Rotating Patterns for Aircraft16 Jul 2026US 2026/0200583 A1Rtx Corporation
- Dual bypass turbofan gas turbine engine2 Jul 2026US 2026/0185478 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Aircraft engine with inter-turbine engine frame supported counter rotating low pressure turbine rotors329US 6,619,030 B1General Electric Company · 2003
- Geared counterrotating turbine/fan propulsion system226US 5,010,729 AGeneral Electric Company · 1991
- Gas turbine engine rotor support system219US 5,361,580 AGeneral Electric Company · 1994
- Nested core gas turbine engine195US 7,219,490 B2D-Star Engineering · 2007
- High bypass ratio counterrotating turbofan engine172US 4,790,133 AGeneral Electric Company · 1988