F02K 9/42
Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor: using liquid
Official title: using liquid or gaseous propellants (F02K9/72 takes precedence)
F02K9/42 (Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor: using liquid) appears on 1,159 US grants and 912 published applications in this corpus.
Search patents in F02K- Granted patents
- 1,159
- Published applications
- 912
- Assignees
- 410
- Inventors
- 2,225
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 8 | 0 |
| 1978 | 8 | 0 |
| 1979 | 7 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 7 | 0 |
| 1984 | 7 | 0 |
| 1985 | 10 | 0 |
| 1986 | 12 | 0 |
| 1987 | 14 | 0 |
| 1988 | 22 | 0 |
| 1989 | 17 | 0 |
| 1990 | 21 | 0 |
| 1991 | 15 | 0 |
| 1992 | 21 | 0 |
| 1993 | 17 | 0 |
| 1994 | 10 | 0 |
| 1995 | 21 | 0 |
| 1996 | 16 | 0 |
| 1997 | 12 | 0 |
| 1998 | 28 | 0 |
| 1999 | 18 | 0 |
| 2000 | 24 | 0 |
| 2001 | 47 | 5 |
| 2002 | 27 | 15 |
| 2003 | 30 | 30 |
| 2004 | 27 | 35 |
| 2005 | 22 | 19 |
| 2006 | 19 | 16 |
| 2007 | 15 | 15 |
| 2008 | 12 | 24 |
| 2009 | 17 | 35 |
| 2010 | 20 | 43 |
| 2011 | 22 | 20 |
| 2012 | 20 | 27 |
| 2013 | 29 | 37 |
| 2014 | 22 | 29 |
| 2015 | 26 | 43 |
| 2016 | 33 | 44 |
| 2017 | 21 | 48 |
| 2018 | 27 | 58 |
| 2019 | 37 | 34 |
| 2020 | 39 | 45 |
| 2021 | 46 | 33 |
| 2022 | 52 | 60 |
| 2023 | 58 | 60 |
| 2024 | 70 | 51 |
| 2025 | 47 | 48 |
| 2026 | 31 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Combustion mode switching engine6 Oct 2026US 12,753,730 B2PD AeroSpace, LTD.
- Thrust vector control for hybrid propellants rocket engine with embedded fluid injection ports22 Sep 2026US 12,742,433 B2Laboratoire Reaction Dynamics Inc.
- High-frequency pulsed co-axial injector system and method for high-speed flow mixing and control18 Aug 2026US 12,708,912 B2Tuskegee University
- Spacecraft-borne propulsion device with gas heating and gas storage18 Aug 2026US 12,709,412 B2Tohoku University
- Lightweight structural battery use in laser rocket18 Aug 2026US 12,710,022 B1
- Transpiration-cooled systems having permeable and non-permeable portions8 Oct 2026US 2026/0307827 A1Blue Origin Manufacturing, LLC
- Omnivorous solar thermal thruster, cooling systems, and thermal energy transfer in rockets24 Sep 2026US 2026/0286917 A1Trans Astronautica Corporation
- Module for projectile10 Sep 2026US 2026/0266241 A1Israel Aerospace Industries Ltd.
- Disengagement test system and method for a pump13 Aug 2026US 2026/0235129 A1Xi'an Space Engine Company Limited
- Separation device for cryogenic propellant tanks of rocket stages6 Aug 2026US 2026/0225736 A1Arianegroup SAS
Most cited
By later US patents
- Reduce pollution hydrocarbon combustion gas generator174US 5,709,077 AClean Energy Systems, Inc. · 1998
- Reduced pollution power generation system163US 5,715,673 AClean Energy Systems, Inc. · 1998
- Microturbomachinery145US 5,932,940 AMassachusetts Institute of Technology · 1999
- Reduced pollution power generation system having multiple turbines and reheater121US 5,956,937 AClean Energy Systems, Inc. · 1999
- Microturbomachinery113US 6,392,313 B1Massachusetts Institute of Technology · 2002