C21D 1/673
For die quenching
Official title: for die quenching
C21D1/673 (For die quenching) appears on 592 US grants and 967 published applications in this corpus.
Search patents in C21D- Granted patents
- 592
- Published applications
- 967
- Assignees
- 228
- Inventors
- 1,417
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 8 | 2 |
| 2002 | 3 | 3 |
| 2003 | 4 | 6 |
| 2004 | 1 | 7 |
| 2005 | 5 | 6 |
| 2006 | 3 | 6 |
| 2007 | 4 | 13 |
| 2008 | 2 | 10 |
| 2009 | 4 | 12 |
| 2010 | 6 | 20 |
| 2011 | 9 | 37 |
| 2012 | 15 | 33 |
| 2013 | 14 | 34 |
| 2014 | 17 | 59 |
| 2015 | 23 | 57 |
| 2016 | 28 | 56 |
| 2017 | 31 | 59 |
| 2018 | 40 | 59 |
| 2019 | 47 | 59 |
| 2020 | 52 | 44 |
| 2021 | 36 | 69 |
| 2022 | 43 | 48 |
| 2023 | 36 | 72 |
| 2024 | 53 | 67 |
| 2025 | 46 | 75 |
| 2026 | 30 | 54 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pre-oxidized, coating-free press hardened steel6 Oct 2026US 12,753,482 B2GM Global Technology Operations LLC
- Press hardening method25 Aug 2026US 12,716,107 B2ArcelorMittal
- Method to operate a hydraulic press for metal sheet forming4 Aug 2026US 12,697,651 B2Diteven Limited:
- Method for producing a steel component provided with a coating, and steel component28 Jul 2026US 12,692,572 B2thyssenkrupp AG
- Steel sheet and high strength press hardened steel part and method of manufacturing the same14 Jul 2026US 12,680,150 B2ArcelorMittal
- Press hardening method24 Sep 2026US 2026/0286457 A1
- Steel sheet and high strength press hardened steel part and method of manufacturing the same24 Sep 2026US 2026/0286484 A1
- Hot stamping component and manufacturing method therefor27 Aug 2026US 2026/0249342 A1Hyundai Steel Company
- Hot-stamped product and method of producing the same27 Aug 2026US 2026/0249343 A1Nippon Steel Corporation
- Press hardened steel part having high-strength and improved ductility27 Aug 2026US 2026/0250797 A1
Most cited
By later US patents
- Process for the manufacture of a part with very high mechanical properties, formed by stamping of a strip of rolled steel sheet and more particularly hot rolled and coated50US 6,564,604 B2Unisor · 2003
- Impact resistant lightweight, low cost automobile bumpers and method of making same33US 4,010,969 AHoudaille Industries, Inc. · 1977
- Hot pressing method for high strength member using steel sheet and hot pressed parts33US 7,867,344 B2Nippon Steel Corporation · 2011
- Method for selectively forming (plastic working) at least one region of a sheet metal layer made from a sheet of spring steel, and a device for carrying out this method33US 8,336,359 B2ElringKlinger AG · 2012
- Method and apparatus for the production of locally reinforced sheet-metal mouldings and products made thereby32US 7,137,201 B2DaimlerChrysler AG · 2006