B21C 23/20
By backward extrusion
Official title: by backward extrusion
B21C23/20 (By backward extrusion) appears on 107 US grants and 91 published applications in this corpus.
Search patents in B21C- Granted patents
- 107
- Published applications
- 91
- Assignees
- 84
- Inventors
- 244
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 6 |
| 2004 | 4 | 4 |
| 2005 | 2 | 6 |
| 2006 | 2 | 6 |
| 2007 | 5 | 5 |
| 2008 | 6 | 4 |
| 2009 | 2 | 2 |
| 2010 | 3 | 5 |
| 2011 | 2 | 0 |
| 2012 | 2 | 3 |
| 2013 | 0 | 0 |
| 2014 | 1 | 2 |
| 2015 | 0 | 1 |
| 2016 | 2 | 2 |
| 2017 | 2 | 3 |
| 2018 | 0 | 6 |
| 2019 | 4 | 0 |
| 2020 | 3 | 7 |
| 2021 | 4 | 8 |
| 2022 | 4 | 4 |
| 2023 | 7 | 5 |
| 2024 | 4 | 5 |
| 2025 | 4 | 3 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Devices and methods for performing shear-assisted extrusion and extrusion processes17 Feb 2026US 12,551,946 B2Battelle Memorial Institute
- Evaporator3 Feb 2026US 12,540,378 B2Tyco Fire & Security GmbH
- Shear assisted extrusion apparatus, tools, and methods23 Dec 2025US 12,502,701 B2Battelle Memorial Institute
- High speed shear-assisted extrusion22 Jul 2025US 12,365,027 B2Battelle Memorial Institute
- Processes and/or machines for producing continuous plastic deformation, and/or compositions and/or manufactures produced thereby8 Jul 2025US 12,350,740 B2
- Evaporator2 Jul 2026US 2026/0185192 A1Tyco Fire & Security GmbH
- Shear Assisted Extrusion Apparatus, Tools, and Methods21 May 2026US 2026/0138170 A1Battelle Memorial Institute
- Extrusion method and apparatus26 Mar 2026US 2026/0084196 A1
- Long cartridge case11 Dec 2025US 2025/0375805 A1The National Machinery Company
- Method and apparatus for manufacturing and inspecting a metal container13 Nov 2025US 2025/0347513 A1Ingenet Automatizacion, S.L.
Most cited
By later US patents
- Reinforcement for vehicle hollow structural member, having decreasing-thickness end portions50US 6,082,811 AKyoho Machine Works, Ltd. · 2000
- Heat sink and process of manufacture37US 6,134,783 A2000
- Method of cold forming24US 4,166,373 ABraun Engineering Company · 1979
- Disk brake friction assembly24US 5,285,873 A1994
- Backward extrusion method and product23US 5,964,117 ALuxfer Group Limited · 1999