B21D 3/00
Straightening or restoring form of metal rods, metal tubes, metal profiles, or
Official title: Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts (straightening of well casings in situ E21B; {straightening rails or rail joints E01B31/08})
B21D3/00 (Straightening or restoring form of metal rods, metal tubes, metal profiles, or) appears on 427 US grants and 305 published applications in this corpus.
Search patents in B21D- Granted patents
- 427
- Published applications
- 305
- Assignees
- 292
- Inventors
- 837
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 16 | 0 |
| 1978 | 12 | 0 |
| 1979 | 9 | 0 |
| 1980 | 9 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 8 | 0 |
| 1985 | 6 | 0 |
| 1986 | 7 | 0 |
| 1987 | 8 | 0 |
| 1988 | 7 | 0 |
| 1989 | 4 | 0 |
| 1990 | 7 | 0 |
| 1991 | 9 | 0 |
| 1992 | 7 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 11 | 0 |
| 1998 | 8 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 12 | 2 |
| 2002 | 14 | 7 |
| 2003 | 2 | 4 |
| 2004 | 1 | 11 |
| 2005 | 6 | 6 |
| 2006 | 3 | 7 |
| 2007 | 8 | 5 |
| 2008 | 5 | 7 |
| 2009 | 2 | 10 |
| 2010 | 3 | 8 |
| 2011 | 5 | 11 |
| 2012 | 6 | 12 |
| 2013 | 10 | 13 |
| 2014 | 9 | 17 |
| 2015 | 17 | 24 |
| 2016 | 11 | 15 |
| 2017 | 21 | 14 |
| 2018 | 14 | 17 |
| 2019 | 10 | 16 |
| 2020 | 11 | 24 |
| 2021 | 16 | 21 |
| 2022 | 12 | 15 |
| 2023 | 19 | 12 |
| 2024 | 16 | 16 |
| 2025 | 8 | 8 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B21D 3/02Straightening or restoring form of metal rods, metal tubes, metal profiles, or173
- B21D 3/16Straightening or restoring form of metal rods, metal tubes, metal profiles, or90
- B21D 3/10Between rams and anvils or abutments85
- B21D 3/14Recontouring80
- B21D 3/12Straightening or restoring form of metal rods, metal tubes, metal profiles, or24
- B21D 3/005Straightening or restoring form of metal rods, metal tubes, metal profiles, or4
Recent patents
- Method for straightening bar-shaped material and a straightening machine1 Sep 2026US 12,722,194 B2Rattunde AG
- Side rail repair tool16 Jun 2026US 12,654,214 B2
- Systems and methods for deformation correction of a gas turbine shroud26 May 2026US 12,636,694 B2GE Vernova Infrastructure Technology LLC
- Apparatus for the orbital cutting and calibration of tubes17 Mar 2026US 12,576,438 B2Blm S.P.A.
- Steel material for a torsionally stressed component, method for producing a torsionally stressed component from said steel material, and component made thereof30 Sep 2025US 12,428,693 B2Mannesmann Precision Tubes GmbH
- Welding-wire-straightening apparatus6 Aug 2026US 2026/0225148 A1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- Hot Straightening Device for the Hot Straightening of a Component and Hot Straightening Process30 Jul 2026US 2026/0216775 A1Core 12 GmbH
- Transport system for a pipe and method for delivering a pipe19 Mar 2026US 2026/0077413 A1Alleima GmbH
- Repair apparatus and method24 Jul 2025US 2025/0236269 A1Jaguar Land Rover Limited
- Magnesium alloy molded article and manufacturing method thereof3 Jul 2025US 2025/0215547 A1Massive Lab Inc.
Most cited
By later US patents
- Method of straightening wire rods of titanium and titanium alloy64US 6,077,369 ANippon Steel Corporation · 2000
- Wire straightener and method for straightening wire34US 4,464,919 A1984
- Hot stretch straightening of high strength α/β processed titanium29US 8,499,605 B2ATI Properties, Inc. · 2013
- Method and apparatus for truing or straightening out of true work pieces25US 5,235,838 AW. Hegenscheidt Gesellschaft mbH · 1993
- Pulsing impact straightener22US 4,416,130 AIndustrial Metal Products Corporation · 1983