B21C 23/03
By both direct and backward extrusion
Official title: by both direct and backward extrusion
B21C23/03 (By both direct and backward extrusion) appears on 28 US grants and 15 published applications in this corpus.
Search patents in B21C- Granted patents
- 28
- Published applications
- 15
- Assignees
- 20
- Inventors
- 64
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 0 | 2 |
| 2019 | 0 | 2 |
| 2020 | 3 | 2 |
| 2021 | 4 | 2 |
| 2022 | 0 | 0 |
| 2023 | 2 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Forming method and forming machine for producing a helical toothing of a cylindrical workpiece by extrusion23 Sep 2025US 12,420,331 B2FELSS Systems GmbH
- Electromagnetic extrusion9 Apr 2024US 11,951,519 B2Magna International Inc.
- Method of manufacturing two tubes simultaneously and machine for use therein11 Jul 2023US 11,697,143 B2American Axle & Manufacturing, Inc.
- Method for forming a moulding and moulding28 Feb 2023US 11,590,546 B2Neuman Aluminium Fliesspresswerk GmbH
- Method of manufacturing cup structure19 Oct 2021US 11,148,186 B2Matec S.p.A.
- Suspension link for vehicles, in particular motor vehicles, and method for manufacturing such a suspension link5 Mar 2026US 2026/0061792 A1Willi Elbe Gelenkwellen GmbH & Co. KG
- Forming method and forming machine for producing a helical toothing of a cylindrical workpiece by extrusion14 Dec 2023US 2023/0398598 A1FELSS Systems GmbH
- Method of forming thick-walled cylinder by spinning30 Sep 2021US 2021/0299727 A1Yanshan University
- Method of Manufacturing Two Tubes Simultaneously and Machine for Use Therein11 Mar 2021US 2021/0069765 A1American Axle & Manufacturing, Inc.
- Electromagnetic extrusion17 Dec 2020US 2020/0391265 A1Magna International Inc.
Most cited
By later US patents
- Cold forming dies and cold forming process57US 4,945,749 AGeneral Motors Corporation · 1990
- Method and apparatus for forming elongated articles having reduced diameter cross-sections44US 4,300,378 A1981
- Method and apparatus for forming an electrical connector43US 4,416,141 AThe Nippert Company · 1983
- Method of cold forming24US 4,166,373 ABraun Engineering Company · 1979
- Cold flow forming23US 4,177,665 A1979