B21K 21/14
Closed or substantially-closed ends
Official title: closed or substantially-closed ends, e.g. cartridge bottoms
B21K21/14 (Closed or substantially-closed ends) appears on 45 US grants and 32 published applications in this corpus.
Search patents in B21K- Granted patents
- 45
- Published applications
- 32
- Assignees
- 32
- Inventors
- 92
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 0 |
| 2006 | 1 | 2 |
| 2007 | 1 | 3 |
| 2008 | 0 | 1 |
| 2009 | 2 | 2 |
| 2010 | 2 | 1 |
| 2011 | 2 | 3 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 2 | 0 |
| 2015 | 0 | 2 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 4 |
| 2019 | 0 | 2 |
| 2020 | 4 | 1 |
| 2021 | 1 | 3 |
| 2022 | 4 | 2 |
| 2023 | 4 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for production of a steel tubular product, in particular an airbag tubular product, and a steel tubular product produced using this method, in particular an airbag tubular product11 Aug 2026US 12,703,021 B2Benteler Steel/Tube GmbH
- Method and tool for producing a base piece of a multi-part cartridge case, base piece and cartridge case14 Apr 2026US 12,601,573 B2Ruag Ammotec GmbH
- Stabilizer and method of manufacturing same28 Nov 2023US 11,827,068 B2NHK Spring Co., Ltd.
- Method for manufacturing stabilizer17 Oct 2023US 11,786,960 B2NHK Spring Co., Ltd.
- Hollow coil spring and suspension device for vehicle27 Jun 2023US 11,685,211 B2NHK Spring Co., Ltd.
- Method of manufacturing stabilizer and base material26 Jun 2025US 2025/0205773 A1NHK Spring Co., Ltd.
- Method and tool for producing a base piece of a multi-part cartridge case, base piece and cartridge case14 Nov 2024US 2024/0377172 A1Ruag Ammotec GmbH
- Method for production of a steel tubular product, in particular an airbag tubular product, and a steel tubular product produced using this method, in particular an airbag tubular product2 Mar 2023US 2023/0061970 A1Benteler Steel/Tube GmbH
- Method for manufacturing stabilizer19 May 2022US 2022/0152689 A1NHK Spring Co., Ltd.
- Hollow coil spring and suspension device for vehicle10 Feb 2022US 2022/0041027 A1NHK Spring Co., Ltd.
Most cited
By later US patents
- Metal injection molded cased telescoped ammunition46US 10,871,361 B2Concurrent Technologies Corporation · 2020
- Gas manifold for a cooking range, with a pipe closure42US 7,861,706 B2Coprecitec, S. L. · 2011
- Valve lifter and method of producing the same24US 4,829,950 AHitachi, Ltd. · 1989
- Method for forming a recess portion on a metal plate21US 6,145,365 ANakamura Seisakusho Kabushikigaisha · 2000
- Microsurgical probe17US 7,600,405 B2Alcon Inc. · 2009