C21D 8/0421
Characterised by the working steps
Official title: {characterised by the working steps}
C21D8/0421 (Characterised by the working steps) appears on 517 US grants and 589 published applications in this corpus.
Search patents in C21D- Granted patents
- 517
- Published applications
- 589
- Assignees
- 125
- Inventors
- 1,242
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 7 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 6 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 6 | 0 |
| 1995 | 3 | 0 |
| 1996 | 11 | 0 |
| 1997 | 4 | 0 |
| 1998 | 11 | 0 |
| 1999 | 5 | 0 |
| 2000 | 9 | 0 |
| 2001 | 9 | 3 |
| 2002 | 7 | 3 |
| 2003 | 7 | 6 |
| 2004 | 8 | 19 |
| 2005 | 4 | 2 |
| 2006 | 3 | 9 |
| 2007 | 2 | 5 |
| 2008 | 3 | 7 |
| 2009 | 4 | 15 |
| 2010 | 5 | 22 |
| 2011 | 7 | 25 |
| 2012 | 9 | 9 |
| 2013 | 10 | 22 |
| 2014 | 8 | 39 |
| 2015 | 19 | 34 |
| 2016 | 13 | 28 |
| 2017 | 19 | 30 |
| 2018 | 30 | 24 |
| 2019 | 24 | 38 |
| 2020 | 27 | 38 |
| 2021 | 26 | 47 |
| 2022 | 36 | 54 |
| 2023 | 29 | 36 |
| 2024 | 42 | 29 |
| 2025 | 35 | 23 |
| 2026 | 18 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Steel sheet1 Sep 2026US 12,723,295 B2Nippon Steel Corporation
- Steel aerosol monobloc11 Aug 2026US 12,703,901 B2ArcelorMittal
- Steel sheet and press-formed article16 Jun 2026US 12,655,511 B2Nippon Steel Corporation
- Al—Fe-alloy plated steel sheet for hot forming, having excellent TWB welding characteristics, hot forming member, and manufacturing methods therefor2 Jun 2026US 12,644,170 B2Posco
- Ultra-high-strength hot-rolled steel sheet, steel pipe, member, and manufacturing methods therefor26 May 2026US 12,637,727 B2Posco
- Hot stamping component and manufacturing method therefor27 Aug 2026US 2026/0249342 A1Hyundai Steel Company
- Press hardened steel part having high-strength and improved ductility27 Aug 2026US 2026/0250797 A1
- Steel sheet, member, and part, and methods of producing same27 Aug 2026US 2026/0250814 A1Jfe Steel Corporation
- Steel sheet for hot-stamping, method for manufacturing steel sheet for hot-stamping, and hot-stamped formed body27 Aug 2026US 2026/0250815 A1Nippon Steel Corporation
- High-tensile steel having improved hydrogen embrittlement resistance13 Aug 2026US 2026/0233274 A1ThyssenKrupp Steel Europe AG
Most cited
By later US patents
- Cold rolled steel sheets having an improved press formability28US 4,775,599 AKawasaki Steel Corporation · 1988
- Battery can, sheet for forming battery can, and method for manufacturing sheet27US 5,576,113 AKatayama Special Industries, Ltd. · 1996
- Method for producing cold rolled steel sheets having a noticeably excellent formability24US 4,368,084 AKawasaki Steel Corporation · 1983
- Manufacturing process for austenitic high manganese steel having superior formability, strengths and weldability24US 5,431,753 APohang Iron & Steel Co., Ltd. · 1995
- High-strength steel sheet highly resistant to dynamic deformation and excellent in workability and process for the production thereof23US 6,544,354 B1Nippon Steel Corporation · 2003