C21D 7/00
Modifying the physical properties of iron or steel by deformation
Official title: Modifying the physical properties of iron or steel by deformation (apparatus for mechanical working of metal B21, B23, B24)
C21D7/00 (Modifying the physical properties of iron or steel by deformation) appears on 1,499 US grants and 1,792 published applications in this corpus.
Search patents in C21D- Granted patents
- 1,499
- Published applications
- 1,792
- Assignees
- 840
- Inventors
- 4,378
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 5 | 0 |
| 1978 | 11 | 0 |
| 1979 | 6 | 0 |
| 1980 | 9 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 8 | 0 |
| 1984 | 12 | 0 |
| 1985 | 10 | 0 |
| 1986 | 12 | 0 |
| 1987 | 17 | 0 |
| 1988 | 11 | 0 |
| 1989 | 14 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 6 | 0 |
| 1993 | 18 | 0 |
| 1994 | 15 | 0 |
| 1995 | 10 | 0 |
| 1996 | 23 | 0 |
| 1997 | 22 | 0 |
| 1998 | 25 | 0 |
| 1999 | 18 | 0 |
| 2000 | 21 | 0 |
| 2001 | 26 | 3 |
| 2002 | 27 | 35 |
| 2003 | 33 | 40 |
| 2004 | 22 | 39 |
| 2005 | 26 | 45 |
| 2006 | 23 | 39 |
| 2007 | 20 | 36 |
| 2008 | 17 | 57 |
| 2009 | 18 | 59 |
| 2010 | 40 | 74 |
| 2011 | 25 | 63 |
| 2012 | 41 | 58 |
| 2013 | 50 | 75 |
| 2014 | 32 | 85 |
| 2015 | 61 | 106 |
| 2016 | 61 | 92 |
| 2017 | 71 | 78 |
| 2018 | 63 | 84 |
| 2019 | 75 | 80 |
| 2020 | 64 | 85 |
| 2021 | 67 | 76 |
| 2022 | 48 | 94 |
| 2023 | 65 | 121 |
| 2024 | 89 | 107 |
| 2025 | 78 | 89 |
| 2026 | 51 | 72 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Slurry-blasted hot-roll-based hot dip aluminized steel strip6 Oct 2026US 12,753,476 B2Cleveland-Cliffs Steel Properties Inc.
- Wire rod for 5000 MPa-grade diamond wire and production method therefor15 Sep 2026US 12,735,763 B2Institute of Research of Iron and Steel, Jiangsu Province/Sha-Steel, Co. Ltd (Cn)
- Method for modifying finished surfaces with the aim of improved surface properties8 Sep 2026US 12,729,414 B2ThyssenKrupp Steel Europe AG
- Extremely thick steel plate for steam drum having excellent surface quality and lamellar tear resistance, and manufacturing method for same25 Aug 2026US 12,716,106 B2Posco
- Hollow wind turbine main shaft and profiling forging process and use thereof25 Aug 2026US 12,716,108 B2Zenkung Heavy Industry (Jiangsu) Co., Ltd.
- Cold-rolled steel material and method for producing same10 Sep 2026US 2026/0265853 A1Hyundai Steel Company
- Method for Producing a Rail for Railway Infrastructure10 Sep 2026US 2026/0265854 A1voestalpine Rail Technology GmbH
- Hot-stamped product and method of producing the same27 Aug 2026US 2026/0249343 A1Nippon Steel Corporation
- Stainless steel clad plate with excellent shape and preparation method thereof20 Aug 2026US 2026/0241428 A1Institute of Research of Iron and Steel, Jiangsu Province/Sha-Steel, Co. Ltd (Cn)
- A unitary firewall panel for a vehicle20 Aug 2026US 2026/0242003 A1
Most cited
By later US patents
- Apparatus and method for forming weld joints having compressive residual stress patterns135US 6,926,970 B2Lambda Research, Inc. · 2005
- Pipe expansion device113US 6,460,615 B1Shell Oil Company · 2002
- Apparatus for processing welded joint parts of pipes109US 4,491,001 AKawasaki Jukogyo Kabushiki Kaisha · 1985
- Guidewire having braided wire over drawn tube construction109US 6,142,975 AAdvanced Cardiovascular Systems, Inc. · 2000
- Laser peening system and method102US 4,937,421 AGeneral Electric Company · 1990