F02K 9/12
Made of two or more portions burning at different rates or having
Official title: made of two or more portions burning at different rates {or having different characteristics}
F02K9/12 (Made of two or more portions burning at different rates or having) appears on 53 US grants and 40 published applications in this corpus.
Search patents in F02K- Granted patents
- 53
- Published applications
- 40
- Assignees
- 29
- Inventors
- 110
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 2 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 3 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 6 |
| 2014 | 1 | 0 |
| 2015 | 3 | 2 |
| 2016 | 1 | 4 |
| 2017 | 2 | 1 |
| 2018 | 4 | 4 |
| 2019 | 3 | 3 |
| 2020 | 6 | 2 |
| 2021 | 2 | 3 |
| 2022 | 3 | 0 |
| 2023 | 3 | 3 |
| 2024 | 2 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rocket motor10 Feb 2026US 12,545,438 B2Cesaroni Aerospace Incorporated
- Multistage variable burning rate solid rocket motor and forming method28 Oct 2025US 12,454,928 B2Dalian University of Technology
- Multi-stage propellant systems, assemblies, and methods30 Jan 2024US 11,884,408 B2Goodrich Corporation
- Additive manufactured thermoplastic-nanocomposite aluminum hybrid rocket fuel grain and method of manufacturing same2 Jan 2024US RE49,775 E1Firehawk Aerospace, Inc.
- Additive manufactured thermoplastic-nanocomposite aluminum hybrid rocket fuel grain and method of manufacturing same26 Dec 2023US RE49,765 E1Firehawk Aerospace, Inc.
- Rocket solid propellant grain25 Jun 2026US 2026/0176212 A1Siec Badawcza Lukasiewicz - Instytut Lotnictwa
- Rocket motor21 May 2026US 2026/0138757 A1Cesaroni Aerospace Incorporated
- Multistage variable burning rate solid rocket motor and forming method13 Mar 2025US 2025/0084806 A1Dalian University of Technology
- Hybrid rocket engine fuel grains with compositional variations30 Jan 2025US 2025/0035070 A1Firehawk Aerospace, Inc.
- Rocket motor9 May 2024US 2024/0150047 A1Cesaroni Aerospace Incorporated
Most cited
By later US patents
- Integral solid booster and hybrid thrust sustaining system and projectile incorporating the same30US 6,125,763 AEnvironmental Aeroscience Corp. · 2000
- Rocket vehicle thrust augmentation within divergent section of nozzle25US 6,568,171 B2Aerojet-General Corporation · 2003
- Multi-burn solid fuel restartable rocket and method of use20US 4,357,795 AGeneral Dynamics, Pomona Division · 1982
- Solid rocket motor with nozzle containing aromatic amide fibers19US 4,574,700 AThe United States of America as represented by the Secretary of the Air Force · 1986
- Additive manufactured thermoplastic-nanocomposite aluminum hybrid rocket fuel grain and method of manufacturing same18US 10,286,599 B22019