C21D 1/62
Quenching devices
C21D1/62 (Quenching devices) appears on 1,182 US grants and 1,526 published applications in this corpus.
Search patents in C21D- Granted patents
- 1,182
- Published applications
- 1,526
- Assignees
- 583
- Inventors
- 2,933
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 15 | 0 |
| 1978 | 12 | 0 |
| 1979 | 11 | 0 |
| 1980 | 15 | 0 |
| 1981 | 7 | 0 |
| 1982 | 5 | 0 |
| 1983 | 14 | 0 |
| 1984 | 10 | 0 |
| 1985 | 7 | 0 |
| 1986 | 11 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 8 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 13 | 0 |
| 1995 | 13 | 0 |
| 1996 | 9 | 0 |
| 1997 | 10 | 0 |
| 1998 | 9 | 0 |
| 1999 | 11 | 0 |
| 2000 | 13 | 0 |
| 2001 | 17 | 10 |
| 2002 | 15 | 18 |
| 2003 | 12 | 10 |
| 2004 | 8 | 15 |
| 2005 | 6 | 19 |
| 2006 | 6 | 20 |
| 2007 | 10 | 26 |
| 2008 | 7 | 16 |
| 2009 | 14 | 28 |
| 2010 | 14 | 38 |
| 2011 | 13 | 59 |
| 2012 | 23 | 57 |
| 2013 | 30 | 49 |
| 2014 | 31 | 83 |
| 2015 | 41 | 86 |
| 2016 | 51 | 90 |
| 2017 | 51 | 95 |
| 2018 | 63 | 94 |
| 2019 | 83 | 90 |
| 2020 | 77 | 91 |
| 2021 | 64 | 93 |
| 2022 | 73 | 78 |
| 2023 | 49 | 95 |
| 2024 | 70 | 90 |
| 2025 | 64 | 102 |
| 2026 | 46 | 74 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Housing of an induction hardening tool6 Oct 2026US 12,752,288 B2Aktiebolaget Skf
- 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
- Dual-frequency power-supply apparatus, high-frequency heating apparatus, and high-frequency quenching apparatus11 Aug 2026US 12,706,545 B2Neturen Co., Ltd.
- Method to operate a hydraulic press for metal sheet forming4 Aug 2026US 12,697,651 B2Diteven Limited:
- Method and device for rapidly cooling a metal strip and continuous production line for metal strips1 Oct 2026US 2026/0297700 A1Fives Stein
- 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
- Induction hardening treatment method and application for large bearing ring3 Sep 2026US 2026/0258521 A1
- Hot stamping component and manufacturing method therefor27 Aug 2026US 2026/0249342 A1Hyundai Steel Company
Most cited
By later US patents
- Process and apparatus for heat treatment of workpieces by quenching with gases80US 5,630,322 AALD Vacuum Technologies GmbH · 1997
- 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
- Process for intermediately quenching light-metal castings coming from a solution heat treatment furnance45US 5,788,784 AMercedes-Benz AG · 1998
- Steel pipe hardening apparatus37US 4,376,528 AKawasaki Steel Corporation · 1983
- Method for the production of improved railway rails by accelerated cooling in line with the production rolling mill35US 4,486,248 AThe Algoma Steel Corporation, Limited · 1984