F02K 9/94
Re-ignitable or restartable rocket- engine plants
Official title: Re-ignitable or restartable rocket- engine plants; Intermittently operated rocket-engine plants
F02K9/94 (Re-ignitable or restartable rocket- engine plants) appears on 99 US grants and 83 published applications in this corpus.
Search patents in F02K- Granted patents
- 99
- Published applications
- 83
- Assignees
- 61
- Inventors
- 223
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 3 |
| 2003 | 6 | 2 |
| 2004 | 3 | 3 |
| 2005 | 0 | 1 |
| 2006 | 2 | 1 |
| 2007 | 2 | 0 |
| 2008 | 0 | 5 |
| 2009 | 2 | 0 |
| 2010 | 3 | 7 |
| 2011 | 2 | 0 |
| 2012 | 5 | 2 |
| 2013 | 4 | 5 |
| 2014 | 1 | 3 |
| 2015 | 2 | 5 |
| 2016 | 3 | 3 |
| 2017 | 0 | 8 |
| 2018 | 4 | 10 |
| 2019 | 6 | 1 |
| 2020 | 8 | 4 |
| 2021 | 5 | 3 |
| 2022 | 5 | 5 |
| 2023 | 4 | 5 |
| 2024 | 4 | 1 |
| 2025 | 3 | 4 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Reusable upper stage rocket with aerospike engine23 Sep 2025US 12,421,921 B2Blue Origin Manufacturing, LLC
- Catalyst-containing material29 Jul 2025US 12,370,528 B2Aerojet Rocketdyne, Inc.
- Hot-gas-generating apparatus with ionic monopropellant and low voltage ignition21 Jan 2025US 12,202,778 B2Laborbital GmbH
- Method for controlling mixing ratio by thermal action in the propellant tanks of space systems8 Oct 2024US 12,110,847 B2Comando De OperaçõEs Aeroespaciais - Comae
- Ignition safety device for a multi-pulse or multi-stage rocket motor system21 May 2024US 11,988,172 B2Raytheon Company
- Reusable Launch Vehicle with Auxiliary Propellant Tanks for Non-Ascent Burns2 Jul 2026US 2026/0184441 A1Blue Origin, LLC
- Reusable Launch Vehicle with Auxiliary Propellant Tanks for Non-Ascent Burns2 Jul 2026US 2026/0184442 A1Blue Origin, LLC
- Reusable upper stage rocket with aerospike engine25 Sep 2025US 2025/0297586 A1Blue Origin Manufacturing, LLC
- Propulsion stage of a launch rocket, launch rocket and method for controlling a propulsion stage1 May 2025US 2025/0136296 A1
- Propulsion stage of a launch vehicle, launch vehicle and method of operating a launch vehicle1 May 2025US 2025/0136298 A1
Most cited
By later US patents
- Ram booster30US 8,047,472 B1The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 2011
- Recoverable booster stage and recovery method27US 6,158,693 AKistler Aerospace Corporation · 2000
- Gel/solid bipropellant propulsion system with energy management capability26US 5,133,183 AThe United States of America as represented by the Secretary of the Army · 1992
- Combination diffuser, thermal barrier, and interchamber valve for rockets25US 4,023,355 AThiokol Corporation · 1977
- MEMS microthruster array24US 6,378,292 B1Honeywell International Inc. · 2002