F02K 9/44
Feeding propellants
F02K9/44 (Feeding propellants) appears on 696 US grants and 536 published applications in this corpus.
Search patents in F02K- Granted patents
- 696
- Published applications
- 536
- Assignees
- 273
- Inventors
- 1,324
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 8 | 0 |
| 1987 | 8 | 0 |
| 1988 | 17 | 0 |
| 1989 | 9 | 0 |
| 1990 | 10 | 0 |
| 1991 | 12 | 0 |
| 1992 | 13 | 0 |
| 1993 | 13 | 0 |
| 1994 | 4 | 0 |
| 1995 | 11 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 19 | 0 |
| 1999 | 13 | 0 |
| 2000 | 14 | 0 |
| 2001 | 27 | 2 |
| 2002 | 15 | 7 |
| 2003 | 18 | 16 |
| 2004 | 11 | 17 |
| 2005 | 11 | 6 |
| 2006 | 9 | 5 |
| 2007 | 7 | 6 |
| 2008 | 5 | 13 |
| 2009 | 10 | 19 |
| 2010 | 12 | 24 |
| 2011 | 14 | 11 |
| 2012 | 14 | 16 |
| 2013 | 17 | 21 |
| 2014 | 13 | 16 |
| 2015 | 15 | 27 |
| 2016 | 17 | 30 |
| 2017 | 12 | 36 |
| 2018 | 12 | 34 |
| 2019 | 27 | 18 |
| 2020 | 27 | 32 |
| 2021 | 35 | 19 |
| 2022 | 36 | 39 |
| 2023 | 38 | 39 |
| 2024 | 47 | 27 |
| 2025 | 31 | 32 |
| 2026 | 18 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- High-frequency pulsed co-axial injector system and method for high-speed flow mixing and control18 Aug 2026US 12,708,912 B2Tuskegee University
- Systems and methods for design, manufacture, and test of space thruster propulsion systems11 Aug 2026US 12,704,101 B2Agile Space Industries, Inc.
- Catalytic decomposition reactors28 Jul 2026US 12,692,824 B2Firehawk Aerospace, Inc.
- Device for autonomous rocketry28 Jul 2026US 12,692,826 B2
- Valve for a rocket engine28 Jul 2026US 12,692,949 B2Arianegroup SAS
- Omnivorous solar thermal thruster, cooling systems, and thermal energy transfer in rockets24 Sep 2026US 2026/0286917 A1Trans Astronautica Corporation
- Disengagement test system and method for a pump13 Aug 2026US 2026/0235129 A1Xi'an Space Engine Company Limited
- Air turborocket apparatus with precooler heat exchanger at the air intake30 Jul 2026US 2026/0218670 A1Destinus SA
- Rocket engine using expander bleed cycle9 Jul 2026US 2026/0194030 A1
- Systems and methods for rotating detonation combustion satellite thrusters18 Jun 2026US 2026/0168464 A1Juno Propulsion Inc.
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