F42B 3/12
Bridge initiators
Official title: Bridge initiators {(F42B3/103, F42B3/11, F42B3/195 take precedence; electric ignitors in propellant charges F42C19/12)}
F42B3/12 (Bridge initiators) appears on 528 US grants and 321 published applications in this corpus.
Search patents in F42B- Granted patents
- 528
- Published applications
- 321
- Assignees
- 230
- Inventors
- 955
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 6 | 0 |
| 1988 | 7 | 0 |
| 1989 | 11 | 0 |
| 1990 | 8 | 0 |
| 1991 | 6 | 0 |
| 1992 | 12 | 0 |
| 1993 | 3 | 0 |
| 1994 | 9 | 0 |
| 1995 | 9 | 0 |
| 1996 | 9 | 0 |
| 1997 | 8 | 0 |
| 1998 | 15 | 0 |
| 1999 | 15 | 0 |
| 2000 | 12 | 0 |
| 2001 | 27 | 1 |
| 2002 | 17 | 21 |
| 2003 | 17 | 20 |
| 2004 | 15 | 20 |
| 2005 | 13 | 23 |
| 2006 | 13 | 11 |
| 2007 | 10 | 8 |
| 2008 | 11 | 14 |
| 2009 | 9 | 13 |
| 2010 | 12 | 10 |
| 2011 | 8 | 7 |
| 2012 | 14 | 15 |
| 2013 | 12 | 12 |
| 2014 | 10 | 8 |
| 2015 | 14 | 15 |
| 2016 | 13 | 16 |
| 2017 | 16 | 12 |
| 2018 | 12 | 16 |
| 2019 | 20 | 10 |
| 2020 | 18 | 16 |
| 2021 | 16 | 10 |
| 2022 | 13 | 13 |
| 2023 | 13 | 8 |
| 2024 | 13 | 9 |
| 2025 | 15 | 7 |
| 2026 | 13 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F42B 3/121Initiators with incorporated integrated circuit183
- F42B 3/124Characterised by the configuration or material of the bridge152
- F42B 3/125Characterised by the configuration of the bridge initiator case99
- F42B 3/13With semiconductive bridge96
- F42B 3/128Characterised by the composition of the pyrotechnic material33
Recent patents
- Compact encapsulated exploding foil initiator assembly8 Sep 2026US 12,729,937 B1Reynolds Systems, Inc.
- Explosive foil initiator (EF) with enhanced detonation energy25 Aug 2026US 12,716,700 B2Raytheon Company
- Modular exploding foil initiator assembly30 Jun 2026US 12,669,315 B1Reynolds Systems, Inc.
- Ignition device2 Jun 2026US 12,644,682 B2Nippon Kayaku Kabushiki Kaisha
- Ignition device, method for producing the same, ignition method and rocket combustion system19 May 2026US 12,631,156 B2National University Corporation Hokkaido University
- Modular exploding foil initiator assembly1 Oct 2026US 2026/0298592 A1Reynolds Systems, Inc.
- Semiconductor bridge with static discharge protection and the method of the same4 Jun 2026US 2026/0153312 A1Hangzhou Dianzi University
- Assembly with an electric feedthrough and method for the production thereof28 May 2026US 2026/0150190 A1Schott AG
- Autonomous pyrotechnic igniter simulator21 May 2026US 2026/0139933 A1Mbda France
- Explosive foil initiator (ef) with enhanced detonation energy21 May 2026US 2026/0139934 A1Raytheon Company
Most cited
By later US patents
- Detonator actuator151US 5,090,321 AICI Australia Limited · 1992
- Method and apparatus for safe transport handling arming and firing of perforating guns using a bubble activated detonator146US 5,088,413 ASchlumberger Technology Corporation · 1992
- Detonators for use with explosive devices136US 6,752,083 B1Schlumberger Technology Corporation · 2004
- Integrated detonator delay circuits and firing console127US 4,674,047 AThe Curators of the University of Missouri · 1987
- Electropyrotechnic igniter with integrated electronics126US 6,418,853 B1Livbag SNC · 2002