F42B 1/02
Shaped or hollow charges
Official title: Shaped or hollow charges (blasting cartridges with cavities in the charge F42B3/08; oil winning using shaped-charge perforators E21B43/116)
F42B1/02 (Shaped or hollow charges) appears on 566 US grants and 414 published applications in this corpus.
Search patents in F42B- Granted patents
- 566
- Published applications
- 414
- Assignees
- 197
- Inventors
- 845
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 11 | 0 |
| 1985 | 8 | 0 |
| 1986 | 7 | 0 |
| 1987 | 12 | 0 |
| 1988 | 6 | 0 |
| 1989 | 11 | 0 |
| 1990 | 10 | 0 |
| 1991 | 11 | 0 |
| 1992 | 9 | 0 |
| 1993 | 9 | 0 |
| 1994 | 10 | 0 |
| 1995 | 5 | 0 |
| 1996 | 10 | 0 |
| 1997 | 7 | 0 |
| 1998 | 10 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 9 | 1 |
| 2002 | 11 | 11 |
| 2003 | 14 | 9 |
| 2004 | 5 | 12 |
| 2005 | 10 | 9 |
| 2006 | 5 | 7 |
| 2007 | 7 | 10 |
| 2008 | 3 | 6 |
| 2009 | 7 | 12 |
| 2010 | 13 | 15 |
| 2011 | 16 | 18 |
| 2012 | 15 | 9 |
| 2013 | 12 | 21 |
| 2014 | 18 | 17 |
| 2015 | 19 | 24 |
| 2016 | 19 | 19 |
| 2017 | 27 | 24 |
| 2018 | 24 | 24 |
| 2019 | 28 | 31 |
| 2020 | 24 | 21 |
| 2021 | 18 | 32 |
| 2022 | 24 | 21 |
| 2023 | 23 | 11 |
| 2024 | 18 | 19 |
| 2025 | 16 | 16 |
| 2026 | 13 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Insensitive high explosive based tubing cutter1 Sep 2026US 12,723,479 B2Halliburton Energy Services.Inc.
- Linear shaped charge electro-explosive (LSCe) device with a backside boosted initiation18 Aug 2026US 12,710,255 B1Raytheon Company
- Emergency rescue shaped charge cutting device with life detection function28 Jul 2026US 12,693,104 B2Jianghan University
- Integrated additive manufacture (AM) of explosive payloads7 Jul 2026US 12,674,650 B1Raytheon Company
- Propellant charge and cannon shell therewith16 Jun 2026US 12,656,090 B2
- Propellant charge and cannon shell therewith17 Sep 2026US 2026/0276353 A1
- Modular shaped charge having selectable charge outputs10 Sep 2026US 2026/0266585 A1Lawrence Livermore National Security, LLC
- Linear shaped charge electro-explosive (lsce) device with a backside boosted initiation20 Aug 2026US 2026/0243550 A1Raytheon Company
- Overmolded shaped charge and methods of use13 Aug 2026US 2026/0235018 A1Defiant Precision Technologies, LLC
- Low standoff shaped charge30 Jul 2026US 2026/0219012 A1
Most cited
By later US patents
- Shaped-charge with simultaneous multi-point initiation of explosives120US 5,479,860 AWestern Atlas International, Inc. · 1996
- Electrically activated, metal-fueled explosive device108US 5,859,383 A1999
- Adapter for shaped charge casing107US 7,752,971 B2Baker Hughes Incorporated · 2010
- Apparatus for electromechanically connecting a plurality of guns for well perforation80US 10,352,136 B22019
- Metal shaped charge liner with isotropic coating77US 4,766,813 AOlin Corporation · 1988