F42D 1/055
Specially adapted for firing multiple charges with a time delay
Official title: specially adapted for firing multiple charges with a time delay
F42D1/055 (Specially adapted for firing multiple charges with a time delay) appears on 283 US grants and 241 published applications in this corpus.
Search patents in F42D- Granted patents
- 283
- Published applications
- 241
- Assignees
- 115
- Inventors
- 371
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 7 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 0 |
| 2003 | 5 | 5 |
| 2004 | 1 | 3 |
| 2005 | 5 | 16 |
| 2006 | 8 | 8 |
| 2007 | 2 | 7 |
| 2008 | 6 | 11 |
| 2009 | 5 | 5 |
| 2010 | 7 | 10 |
| 2011 | 8 | 9 |
| 2012 | 5 | 13 |
| 2013 | 8 | 9 |
| 2014 | 10 | 12 |
| 2015 | 8 | 7 |
| 2016 | 11 | 15 |
| 2017 | 14 | 8 |
| 2018 | 10 | 10 |
| 2019 | 13 | 8 |
| 2020 | 8 | 12 |
| 2021 | 5 | 21 |
| 2022 | 19 | 13 |
| 2023 | 9 | 13 |
| 2024 | 18 | 14 |
| 2025 | 20 | 7 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Single-capacitor electronic detonator and system for firing such single-capacitor electronic detonators4 Aug 2026US 12,698,954 B2Davey Bickford
- Velocity of detonation measurement16 Jun 2026US 12,656,095 B2Detnet South Africa (Pty) Ltd
- Communications in electronic detonators26 May 2026US 12,638,283 B2Austin Star Detonator Company
- Shock initiation of non-electric shock tube5 May 2026US 12,618,655 B1Honeywell Federal Manufacturing & Technologies, LLC
- Safety systems for commercial blasting operations7 Apr 2026US 12,595,993 B2Orica International Pte Ltd
- Mixed blasting system6 Aug 2026US 2026/0227166 A1Detnet South Africa (Pty) Ltd
- Wireless detonator consolidation30 Jul 2026US 2026/0219017 A1
- Multi-atmospheric safe firing control circuit for wireless detonators and initiators2 Jul 2026US 2026/0185811 A1Down Range Systems LLC
- Starter detonator21 May 2026US 2026/0139937 A1Detnet South Africa (Pty) Ltd
- Wireless initiation device21 Aug 2025US 2025/0264316 A1Orica International Pte Ltd
Most cited
By later US patents
- Detonator actuator151US 5,090,321 AICI Australia Limited · 1992
- Remote detonation of explosive charges130US 4,884,506 AElectronic Warfare Associates, Inc. · 1989
- Integrated detonator delay circuits and firing console127US 4,674,047 AThe Curators of the University of Missouri · 1987
- Wellbore gun perforating system and method124US 9,194,219 B1Geodynamics, Inc. · 2015
- Modular initiator123US 8,256,337 B2Baker Hughes Incorporated · 2012