B21C 25/08
Dies or mandrels with section variable during extruding
Official title: Dies or mandrels with section variable during extruding, e.g. for making tapered work; Controlling variation
B21C25/08 (Dies or mandrels with section variable during extruding) appears on 72 US grants and 57 published applications in this corpus.
Search patents in B21C- Granted patents
- 72
- Published applications
- 57
- Assignees
- 43
- Inventors
- 149
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 2 |
| 2003 | 0 | 3 |
| 2004 | 4 | 4 |
| 2005 | 2 | 4 |
| 2006 | 1 | 2 |
| 2007 | 3 | 2 |
| 2008 | 3 | 0 |
| 2009 | 1 | 4 |
| 2010 | 0 | 0 |
| 2011 | 1 | 4 |
| 2012 | 4 | 4 |
| 2013 | 4 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 0 | 1 |
| 2017 | 0 | 3 |
| 2018 | 0 | 4 |
| 2019 | 3 | 3 |
| 2020 | 3 | 4 |
| 2021 | 5 | 3 |
| 2022 | 2 | 2 |
| 2023 | 3 | 0 |
| 2024 | 1 | 2 |
| 2025 | 3 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus and method for extruding curved profiles29 Jul 2025US 12,370,591 B2Imperial College Innovations Limited
- Extruded heat pipe20 May 2025US 12,303,957 B2Intel Corporation
- Extrusion molding method for differential thickness pipe and extrusion molding apparatus for differential thickness pipe4 Feb 2025US 12,214,395 B2Sango Co., Ltd.
- Rotary extrusion forming method for cabin section workpiece2 Jan 2024US 11,858,023 B2North University of China
- Method of manufacturing two tubes simultaneously and machine for use therein11 Jul 2023US 11,697,143 B2American Axle & Manufacturing, Inc.
- Extrusion molding method and extrusion molding apparatus of a differential thickness pipe having a solid part25 Jun 2026US 2026/0175277 A1Sango Co., Ltd.
- Extruded heat pipe15 Jan 2026US 2026/0014608 A1Intel Corporation
- Extrusion molding method of differential thickness pipe and extrusion molding apparatus of differential thickness pipe1 May 2025US 2025/0135518 A1Sango Co., Ltd.
- Variable thickness extrusion for variable extrudate product properties14 Mar 2024US 2024/0082896 A1Battelle Memorial Institute
- Extrusion with specifiable or variable wall thickness14 Mar 2024US 2024/0082898 A1Battelle Memorial Institute
Most cited
By later US patents
- Process of forming an irregular surface on the inside of a tube or pipe57US 3,944,641 A1976
- Methods for forming artificial diamond48US 5,462,772 A1995
- Continuous extrusion process and device for rods made of a plastic raw material and provided with a spiral inner channel35US 6,248,277 B1Konrad Friedrichs KG · 2001
- Tubular articles with varying wall thickness and method of manufacturing same30US 7,412,866 B2Arcelormittal Tubular Products Canada Inc. · 2008
- Process for extruding a metal tube with inwardly thickened end portions25US 4,292,831 A1981