F03H 99/00
Subject matter not provided for in other groups of this subclass
F03H99/00 (Subject matter not provided for in other groups of this subclass) appears on 115 US grants and 197 published applications in this corpus.
Search patents in F03H- Granted patents
- 115
- Published applications
- 197
- Assignees
- 54
- Inventors
- 228
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 5 | 8 |
| 2003 | 4 | 5 |
| 2004 | 2 | 8 |
| 2005 | 2 | 16 |
| 2006 | 3 | 10 |
| 2007 | 1 | 9 |
| 2008 | 3 | 6 |
| 2009 | 1 | 4 |
| 2010 | 2 | 9 |
| 2011 | 4 | 4 |
| 2012 | 2 | 6 |
| 2013 | 2 | 3 |
| 2014 | 2 | 9 |
| 2015 | 3 | 6 |
| 2016 | 5 | 2 |
| 2017 | 6 | 8 |
| 2018 | 6 | 3 |
| 2019 | 4 | 10 |
| 2020 | 6 | 11 |
| 2021 | 5 | 11 |
| 2022 | 7 | 9 |
| 2023 | 4 | 12 |
| 2024 | 2 | 10 |
| 2025 | 6 | 9 |
| 2026 | 6 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Contained gas recirculation system for a vehicle22 Sep 2026US 12,741,758 B2Belen Aerospace Corporation
- Method and apparatus that uses pulsed, counter-rotating plasmas to extract useful energy from the zero-point field and/or to modify or nullify the forces of gravity and inertia, or the properties of mass25 Aug 2026US 12,715,620 B2
- Spacecraft-borne propulsion device with gas heating and gas storage18 Aug 2026US 12,709,412 B2Tohoku University
- ThermaSat solar thermal propulsion system26 May 2026US 12,637,236 B2ThermaSat Inc.
- Radioisotope power system for vehicle19 May 2026US 12,633,429 B2Standard Nuclear, Inc.
- Omnivorous solar thermal thruster, cooling systems, and thermal energy transfer in rockets24 Sep 2026US 2026/0286917 A1Trans Astronautica Corporation
- Fluid Rotary Joint for Gimbals in Electric Propulsion Thrusters30 Jul 2026US 2026/0218688 A1Honeybee Robotics, LLC
- Reactionless space drive by increasing the kinetic energy of a directional plasma flow with magnetohydrodynamic flow arresting23 Jul 2026US 2026/0208883 A1
- Artificial object control method, artificial object control apparatus, and artificial object including the same28 May 2026US 2026/0145816 A1Muscat Space Engineering Co., Ltd.
- Systems, devices, and methods for spacecraft propulsion with a heat exchanger21 May 2026US 2026/0138175 A1Portal Space Systems Inc.
Most cited
By later US patents
- Mobile assault logistic kinetmatic engagement device86US 5,020,411 A1991
- Solar thermal propulsion engine48US 5,138,832 AHercules Incorporated · 1992
- Rotating solar concentrator46US 6,557,804 B1The Boeing Company · 2003
- Advanced hypersonic magnetic jet/electric turbine engine (AHMJET)38US 8,720,205 B22014
- Dipolar force field propulsion system33US 4,663,932 A1987