F42B 3/08
Blasting cartridges, i.e. case and explosive: with cavities in the charge
Official title: with cavities in the charge, e.g. hollow-charge blasting cartridges
F42B3/08 (Blasting cartridges, i.e. case and explosive: with cavities in the charge) appears on 153 US grants and 104 published applications in this corpus.
Search patents in F42B- Granted patents
- 153
- Published applications
- 104
- Assignees
- 70
- Inventors
- 250
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 2 |
| 2003 | 2 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 2 | 0 |
| 2010 | 1 | 3 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 8 |
| 2014 | 5 | 2 |
| 2015 | 7 | 7 |
| 2016 | 6 | 7 |
| 2017 | 15 | 10 |
| 2018 | 5 | 11 |
| 2019 | 10 | 10 |
| 2020 | 8 | 3 |
| 2021 | 7 | 11 |
| 2022 | 11 | 6 |
| 2023 | 7 | 4 |
| 2024 | 6 | 6 |
| 2025 | 5 | 4 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for well perforation7 Apr 2026US 12,595,722 B2Saudi Arabian Oil Company
- Explosive downhole tools having improved wellbore conveyance and debris properties, methods of using the explosive downhole tools in a wellbore, and explosive units for explosive column tools13 Jan 2026US 12,523,107 B2W.T. Bell International, Inc.
- Shaped charge with reactive material28 Oct 2025US 12,455,149 B2Halliburton Energy Services.Inc.
- Half pipe disrupter14 Oct 2025US 12,442,616 B2Disablement Technologies and Consulting LLC
- Explosive downhole tools having improved wellbore conveyance and debris properties, methods of using the explosive downhole tools in a wellbore, and explosive units for explosive column tools19 Aug 2025US 12,392,211 B2W.T. Bell International, Inc.
- Systems and methods for using explosive expansion downhole tools to reduce amount of undesirable fluids in hydrocarbons produced via a wellbore14 May 2026US 2026/0132693 A1
- Half pipe disrupter26 Mar 2026US 2026/0085908 A1Disablement Technologies and Consulting LLC
- Systems and methods for well perforation1 Jan 2026US 2026/0002426 A1Saudi Arabian Oil Company
- Initiator head with circuit board4 Sep 2025US 2025/0277651 A1DynaEnergetics Europe GmbH
- Shaped charge with reactive material28 Aug 2025US 2025/0271243 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Methods and apparatus for severing conduits123US 4,290,486 AJet Research Center, Inc. · 1981
- Shaped-charge with simultaneous multi-point initiation of explosives120US 5,479,860 AWestern Atlas International, Inc. · 1996
- Well bore perforating apparatus92US 4,191,265 ASchlumberger Technology Corporation · 1980
- Gravity oriented perforating gun for use in slanted boreholes92US 4,637,478 AHalliburton Company · 1987
- Box by pin perforating gun system and methods89US 10,273,788 B2Hunting Titan, Inc. · 2019