F02K 9/28
Having two or more propellant charges with the propulsion gases exhausting through
Official title: having two or more propellant charges with the propulsion gases exhausting through a common nozzle
F02K9/28 (Having two or more propellant charges with the propulsion gases exhausting through) appears on 75 US grants and 55 published applications in this corpus.
Search patents in F02K- Granted patents
- 75
- Published applications
- 55
- Assignees
- 34
- Inventors
- 145
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 2 | 1 |
| 2005 | 0 | 3 |
| 2006 | 1 | 0 |
| 2007 | 2 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 4 |
| 2010 | 1 | 3 |
| 2011 | 1 | 2 |
| 2012 | 1 | 2 |
| 2013 | 2 | 3 |
| 2014 | 3 | 0 |
| 2015 | 2 | 3 |
| 2016 | 1 | 1 |
| 2017 | 5 | 3 |
| 2018 | 3 | 4 |
| 2019 | 2 | 0 |
| 2020 | 3 | 8 |
| 2021 | 1 | 3 |
| 2022 | 6 | 4 |
| 2023 | 4 | 3 |
| 2024 | 11 | 4 |
| 2025 | 5 | 1 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Thrust vector control for hybrid propellants rocket engine with embedded fluid injection ports22 Sep 2026US 12,742,433 B2Laboratoire Reaction Dynamics Inc.
- Rocket motor10 Feb 2026US 12,545,438 B2Cesaroni Aerospace Incorporated
- Rocket motor including an embedded charge assembly (ECA) configured to support a burn rate enhancement (BRE) wire28 Oct 2025US 12,454,929 B1Raytheon Company
- Methods for rocket fuel grain coating and unitary manufacture23 Sep 2025US 12,420,339 B1X-Bow Launch Systems Inc.
- Continuous modification in a 3D-printed rocket engine and an additive manufacturing process26 Aug 2025US 12,398,685 B1X-Bow Launch Systems Inc.
- Modulating internal ballistics in a 3d-printed rocket motor and an additive manufacturing process8 Oct 2026US 2026/0309106 A1X-Bow Launch Systems Inc.
- Rocket motor21 May 2026US 2026/0138757 A1Cesaroni Aerospace Incorporated
- 3d-printed rocket fuel grains, rocket engines and an additive manufacturing process30 Apr 2026US 2026/0117725 A1X-Bow Launch Systems Inc.
- Thrust vector control for hybrid propellants rocket engine with embedded fluid injection ports9 Jan 2025US 2025/0012237 A1Laboratoire Reaction Dynamics Inc.
- Multipulse rocket motor with pressure-equalizing channels23 May 2024US 2024/0167435 A1Raytheon Company
Most cited
By later US patents
- Steerable, intermittently operable rocket propulsion system22US 7,281,367 B2Alliant Techsystems Inc. · 2007
- Solid propellant canister loaded multiple pulsed or staged rocket19US 5,070,691 AThiokol Corporation · 1991
- Solid propellant dual pulse rocket motor loaded case and ignition system and method of manufacture17US 5,600,946 AThiokol Corporation · 1997
- Stable-combustion oxidizer vaporizer for hybrid rockets17US 5,794,435 ALockhhed Martin Corporation · 1998
- Multiple propellant solid rocket motor16US 4,840,024 AMorton Thiokol, Inc. · 1989