B21B 17/14
Without mandrel
Official title: without mandrel {, e.g. stretch-reducing mills}
B21B17/14 (Without mandrel) appears on 92 US grants and 68 published applications in this corpus.
Search patents in B21B- Granted patents
- 92
- Published applications
- 68
- Assignees
- 49
- Inventors
- 165
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 3 |
| 2002 | 3 | 2 |
| 2003 | 4 | 4 |
| 2004 | 2 | 3 |
| 2005 | 1 | 1 |
| 2006 | 2 | 2 |
| 2007 | 1 | 4 |
| 2008 | 2 | 4 |
| 2009 | 2 | 2 |
| 2010 | 1 | 3 |
| 2011 | 2 | 3 |
| 2012 | 3 | 2 |
| 2013 | 3 | 4 |
| 2014 | 4 | 3 |
| 2015 | 2 | 4 |
| 2016 | 1 | 1 |
| 2017 | 4 | 0 |
| 2018 | 0 | 2 |
| 2019 | 2 | 1 |
| 2020 | 0 | 2 |
| 2021 | 2 | 4 |
| 2022 | 2 | 2 |
| 2023 | 4 | 2 |
| 2024 | 1 | 2 |
| 2025 | 1 | 7 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device and method for producing roll-formed part21 Jul 2026US 12,686,041 B2Kawasaki Jukogyo Kabushiki Kaisha
- Reducer and/or calibrating rolling mill for rod-shaped bodies21 Apr 2026US 12,605,754 B2Danieli & C. Officine Meccaniche SpA
- Metallic tubular products with enhanced collapse resistance15 Jul 2025US 12,358,038 B2United States Steel Corporation
- Electric resistance welded steel pipe, method for manufacturing the same, and automotive structural member24 Dec 2024US 12,173,835 B2Jfe Steel Corporation
- Method and device for controlling a stretch reducing rolling mill for wall thickness compensation5 Sep 2023US 11,745,235 B2SMS group GmbH
- Device and method for producing roll-formed part24 Sep 2026US 2026/0284725 A1Kawasaki Jukogyo Kabushiki Kaisha
- Modular stand base for spaced stands of a rolling mil20 Nov 2025US 2025/0353052 A1
- Modular stand base for stands of a rolling mill20 Nov 2025US 2025/0353057 A1
- Threefold rotationally symmetrical stand having an adjustment connector20 Nov 2025US 2025/0353058 A1
- Threefold rotationally symmetrical stand having rollers mounted in eccentric bushings20 Nov 2025US 2025/0353059 A1
Most cited
By later US patents
- Tube rolling method and apparatus24US 5,533,370 ASumitomo Metal Industries, Ltd. · 1996
- Method of stretch reducing of tubular stock23US 4,002,048 AAetna-Standard Engineering Company · 1977
- Method of preparing a steel pipe, an apparatus thereof and a steel pipe22US 6,006,789 AKawasaki Steel Corporation · 1999
- Method of fabricating box section from steel with walls that differ in thickness21US 5,040,399 AHoesch Aktiengesellschaft · 1991
- Combined mechanical and thermal processing method for production of seamless steel pipe19US 4,075,041 ANippon Steel Corporation · 1978