C21D 9/46
Heat treatment: for sheet metals
Official title: for sheet metals
C21D9/46 (Heat treatment: for sheet metals) appears on 3,020 US grants and 5,053 published applications in this corpus.
Search patents in C21D- Granted patents
- 3,020
- Published applications
- 5,053
- Assignees
- 529
- Inventors
- 5,242
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 8 | 0 |
| 1983 | 8 | 0 |
| 1984 | 5 | 0 |
| 1985 | 1 | 0 |
| 1986 | 7 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 10 | 0 |
| 2001 | 1 | 3 |
| 2002 | 7 | 4 |
| 2003 | 4 | 11 |
| 2004 | 7 | 26 |
| 2005 | 6 | 6 |
| 2006 | 5 | 14 |
| 2007 | 7 | 22 |
| 2008 | 14 | 51 |
| 2009 | 9 | 68 |
| 2010 | 20 | 89 |
| 2011 | 38 | 78 |
| 2012 | 38 | 76 |
| 2013 | 43 | 133 |
| 2014 | 54 | 176 |
| 2015 | 66 | 231 |
| 2016 | 75 | 236 |
| 2017 | 151 | 282 |
| 2018 | 162 | 300 |
| 2019 | 220 | 326 |
| 2020 | 224 | 375 |
| 2021 | 250 | 321 |
| 2022 | 317 | 479 |
| 2023 | 250 | 467 |
| 2024 | 319 | 484 |
| 2025 | 387 | 405 |
| 2026 | 263 | 390 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- High strength steel sheet and method of producing same6 Oct 2026US 12,753,454 B2Jfe Steel Corporation
- Ultra-high strength cold rolled steel sheet having excellent bendability, and method of manufacturing same6 Oct 2026US 12,753,455 B2Posco
- High-strength electrogalvannealed steel sheet and method for manufacturing the same6 Oct 2026US 12,753,456 B2Jfe Steel Corporation
- Annealing separator composition for grain- oriented electrical steel sheet, grain-oriented electrical steel sheet, and method for producing grain-oriented electrical steel sheet6 Oct 2026US 12,753,457 B2Posco
- Steel sheet with excellent phosphatability and manufacturing method therefor6 Oct 2026US 12,753,458 B2Posco
- A cold rolled martensitic steel and a method of martensitic steel thereof8 Oct 2026US 2026/0308706 A1
- Non-oriented electrical steel plate with high magnetic induction and manufacturing method thereof8 Oct 2026US 2026/0308707 A1Baoshan Iron & Steel Co., Ltd.
- Steel plate and method for manufacturing same8 Oct 2026US 2026/0308708 A1Posco
- Hydrogen induced cracking-resistant cold-rolled hot-dip galvanized ultra-high-strength dual-phase steel and manufacturing method therefor8 Oct 2026US 2026/0308732 A1Baoshan Iron & Steel Co., Ltd.
- Blank, production method for structural member and structural member1 Oct 2026US 2026/0296583 A1Nippon Steel Corporation
Most cited
By later US patents
- Grain-oriented electromagnetic steel sheet with improved watt loss43US 4,293,350 ANippon Steel Corporation · 1981
- Forming curved segments from metal plates42US 4,120,187 AGeneral Dynamics Corporation · 1978
- Method for producing a steel sheet with dual-phase structure composed of ferrite- and rapidly-cooled-transformed phases39US 4,062,700 ANippon Steel Corporation · 1977
- Steel sheet and method for manufacturing the same33US 6,767,417 B2NKK Corporation · 2004
- Coated steel strips, methods of making the same, methods of using the same, stamping blanks prepared from the same, stamped products prepared from the same, and articles of manufacture which contain such a stamped product33US 8,307,680 B2ArcelorMittal France · 2012