C21D 9/16
Heat treatment: for explosive shells
Official title: for explosive shells
C21D9/16 (Heat treatment: for explosive shells) appears on 22 US grants and 17 published applications in this corpus.
Search patents in C21D- Granted patents
- 22
- Published applications
- 17
- Assignees
- 15
- Inventors
- 30
- Latest grant
- 17 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 2 | 2 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 3 | 2 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 2 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 1 | 2 |
| 2025 | 2 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Steel compositions, methods of manufacture and uses in producing rimfire cartridges17 Jun 2025US 12,331,372 B2Greer Steel Company
- Boron steel high-pressure cartridge case1 Apr 2025US 12,263,521 B2Luvata Ohio, Inc.
- Steel compositions, methods of manufacture and uses in producing rimfire cartridges20 Feb 2024US 11,905,569 B2Greer Steel Company
- Boron steel high-pressure cartridge case28 Nov 2023US 11,826,818 B2Luvata Ohio, Inc.
- Heterogeneously stacked multi layered metallic structures with adiabatic shear localization under uniaxial dynamic compression21 Jul 2020US 10,718,597 B2The University of North Carolina at Charlotte
- Steel compositions, methods of manufacture and uses in producing rimfire cartridges2 Oct 2025US 2025/0305079 A1Greer Steel Company
- High-pressure cartridge case31 Jul 2025US 2025/0242403 A1Luvata Ohio, Inc.
- Steel compositions, methods of manufacture and uses in producing rimfire cartridges16 May 2024US 2024/0158878 A1Greer Steel Company
- Boron steel high-pressure cartridge case8 Feb 2024US 2024/0042512 A1Luvata Ohio, Inc.
- Boron steel high-pressure cartridge case31 Mar 2022US 2022/0097124 A1Luvata Ohio, Inc.
Most cited
By later US patents
- Eglin steel—a low alloy high strength composition10US 7,537,727 B2Ellwood National Forge Company · 2009
- Fragmentation device8US 3,956,989 AThe United States of America as represented by the Secretary of the Army · 1976
- Process for manufacturing metal parts by free forging and drop forging in a press8US 5,615,465 ACommissariat A L' Energie Atomique · 1997
- Fragmentation device with increased surface hardness and a method of producing the same8US 9,738,947 B1The United States of America as represented by the Secretary of the Navy · 2017
- Annealing treatment for controlling warhead fragmentation size distribution7US 3,994,752 AThe United States of America as represented by the Secretary of the Navy · 1976