C21D 5/00
Heat treatments of cast-iron
C21D5/00 (Heat treatments of cast-iron) appears on 190 US grants and 165 published applications in this corpus.
Search patents in C21D- Granted patents
- 190
- Published applications
- 165
- Assignees
- 155
- Inventors
- 534
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 1 |
| 2003 | 2 | 2 |
| 2004 | 3 | 4 |
| 2005 | 4 | 5 |
| 2006 | 1 | 5 |
| 2007 | 0 | 4 |
| 2008 | 0 | 7 |
| 2009 | 2 | 6 |
| 2010 | 3 | 10 |
| 2011 | 1 | 11 |
| 2012 | 9 | 7 |
| 2013 | 8 | 14 |
| 2014 | 4 | 12 |
| 2015 | 6 | 12 |
| 2016 | 8 | 8 |
| 2017 | 9 | 8 |
| 2018 | 7 | 6 |
| 2019 | 6 | 5 |
| 2020 | 4 | 7 |
| 2021 | 2 | 6 |
| 2022 | 7 | 10 |
| 2023 | 7 | 6 |
| 2024 | 6 | 2 |
| 2025 | 3 | 7 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tough and corrosion resistant white cast irons3 Feb 2026US 12,540,364 B2Weir Minerals Australia Ltd.
- Cast iron, in particular for components of disc brakes18 Nov 2025US 12,473,617 B2Brembo S.p.A.
- High carbide cast austenitic corrosion resistant alloys11 Nov 2025US 12,467,122 B2Schlumberger Technology Corporation
- Iron-based alloy and method of manufacturing the same4 Feb 2025US 12,215,396 B2Tohoku University
- Friction brake body for a friction brake of a motor vehicle, method for producing a friction brake17 Dec 2024US 12,169,009 B2Buderus Guss Gmb
- Systems and methods for improving iron-based camshaft fatigue life27 Nov 2025US 2025/0360557 A1Cummins Inc.
- Bearing component made of cast iron and process for production thereof25 Sep 2025US 2025/0297645 A1
- Iron casting and method of manufacturing it12 Jun 2025US 2025/0188577 A1Hinode, Ltd.
- Grade of ductile iron with reinforced ferritic matrix17 Apr 2025US 2025/0122600 A1Sediver
- Method for Producing Plated Black Heart Malleable Cast Iron Member, and Plated Black Heart Malleable Cast Iron Member13 Mar 2025US 2025/0084497 A1Kuwana Metals, Ltd.
Most cited
By later US patents
- Lapping tools52US 5,041,173 AKabushiki Kaisha Toshiba · 1991
- Machinable austempered cast iron article having improved machinability, fatigue performance, and resistance to environmental cracking and a method of making the same44US 7,070,666 B2Intermet Corporation · 2006
- Iron-based alloys and methods of making and use thereof38US 9,458,743 B2L. E. Jones Company · 2016
- Hypereutectic white iron alloys comprising chromium and nitrogen and articles made therefrom37US 9,284,631 B22016
- Process of making an austempered ductile iron article29US 4,880,477 ATextron Inc. · 1989