C21D 5/04
Heat treatments of cast-iron: of white cast-iron
Official title: of white cast-iron
C21D5/04 (Heat treatments of cast-iron: of white cast-iron) appears on 36 US grants and 34 published applications in this corpus.
Search patents in C21D- Granted patents
- 36
- Published applications
- 34
- Assignees
- 32
- Inventors
- 100
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 1 | 1 |
| 2014 | 1 | 2 |
| 2015 | 1 | 3 |
| 2016 | 3 | 1 |
| 2017 | 0 | 2 |
| 2018 | 2 | 3 |
| 2019 | 0 | 2 |
| 2020 | 2 | 3 |
| 2021 | 0 | 1 |
| 2022 | 1 | 2 |
| 2023 | 4 | 3 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
| 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.
- Hypereutectic white iron alloy comprising chromium, boron and nitrogen and cryogenically hardened articles made therefrom10 Sep 2024US 12,084,732 B2
- Method for controlling amount of silicon added to ductile cast iron, method for casting ductile cast iron, and cast product2 Apr 2024US 11,946,120 B2Shandong University of Technology
- Construction machine bucket part and manufacturing method therefor14 Nov 2023US 11,814,819 B2Doosan Infracore Co., Ltd.
- Portable carrier device for a furnace charge and handling system for the carrier device7 Nov 2023US 11,807,913 B2EBNER Industrieofenbau GmbH
- 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.
- Primary Carbide Refinement In Hypereutectic High Chromium Cast Irons15 Feb 2024US 2024/0052462 A1Weir Minerals Australia Ltd.
- Hypereutectic white iron alloy comprising chromium, boron and nitrogen and cryogenically hardened articles made therefrom5 Oct 2023US 2023/0313331 A1Townley Foundry & Machine Co., Inc.
- Black Heart Malleable Cast Iron and Method for Producing Same23 Mar 2023US 2023/0086395 A1Hitachi Metals, Ltd.
- Method of manufacturing cast iron components for industrial equipment9 Mar 2023US 2023/0072974 A1Eddy Pump Corporation
Most cited
By later US patents
- Hypereutectic white iron alloys comprising chromium and nitrogen and articles made therefrom37US 9,284,631 B22016
- Wear resistant, high impact, iron alloy member and method of making the same16US 6,033,791 ASmith and Stout Research and Development, Inc. · 2000
- Cryogenically super-hardened high-chromium white cast iron and method thereof14US 5,183,518 ATownley Foundry & Machine Co., Inc. · 1993
- Iron alloy member and method14US 6,171,713 B2Smith and Stout Research and Development, Inc. · 2001
- Low white cast iron grinding slug11US 5,034,069 ANorcast Corporation · 1991