C21B 13/0086
Conditioning, transformation of reduced iron ores
Official title: {Conditioning, transformation of reduced iron ores}
C21B13/0086 (Conditioning, transformation of reduced iron ores) appears on 139 US grants and 125 published applications in this corpus.
Search patents in C21B- Granted patents
- 139
- Published applications
- 125
- Assignees
- 84
- Inventors
- 360
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 6 | 0 |
| 1978 | 7 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 1 |
| 2002 | 3 | 5 |
| 2003 | 7 | 2 |
| 2004 | 0 | 4 |
| 2005 | 1 | 2 |
| 2006 | 0 | 2 |
| 2007 | 1 | 5 |
| 2008 | 3 | 3 |
| 2009 | 3 | 4 |
| 2010 | 4 | 5 |
| 2011 | 2 | 3 |
| 2012 | 6 | 5 |
| 2013 | 3 | 5 |
| 2014 | 4 | 3 |
| 2015 | 6 | 6 |
| 2016 | 2 | 1 |
| 2017 | 2 | 4 |
| 2018 | 0 | 5 |
| 2019 | 6 | 2 |
| 2020 | 5 | 3 |
| 2021 | 4 | 7 |
| 2022 | 3 | 9 |
| 2023 | 2 | 7 |
| 2024 | 6 | 10 |
| 2025 | 7 | 11 |
| 2026 | 1 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of introducing a metalliferous feed in an ironmaking process19 May 2026US 12,630,892 B2Tata Steel Ijmuiden B.V.
- Iron (DRI) between a DRI source and processing equipment for the DRI23 Sep 2025US 12,421,564 B2Midrex Technologies, Inc.
- Method for producing sintered ore2 Sep 2025US 12,404,566 B2Jfe Steel Corporation
- Sealing a reduction assembly5 Aug 2025US 12,378,616 B2Primetals Technologies Austria GmbH
- Methods for preheating metal-containing pellets20 May 2025US 12,305,926 B2Air Products and Chemicals, Inc.
- Sintered ore and method for producing same, and sintered ore for hydrogen reduction and method for producing same27 Aug 2026US 2026/0250798 A1Jfe Steel Corporation
- Biomass Direct Reduced Iron23 Jul 2026US 2026/0209873 A1Technological Resources Pty. Limited
- Method for manufacturing direct reduced iron with a low carbon content2 Jul 2026US 2026/0185172 A1
- A method for manufacturing pig iron in an electrical smelting furnace and associated furnace25 Jun 2026US 2026/0176708 A1
- Direct Reduced Iron Pellets and Use Thereof16 Apr 2026US 2026/0103768 A1HYBRIT Development AB
Most cited
By later US patents
- Method of direct iron-making / steel-making via gas or coal-based direct reduction and apparatus61US 6,648,942 B2Midrex International B.V. Rotterdam, Zurich Branch · 2003
- Method for manufacturing reduced iron pellets36US 6,241,803 B1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) · 2001
- Method for controlling the carbon content of directly reduced iron19US 4,054,444 AMidrex Corporation · 1977
- Apparatus for the pneumatic transport of large iron-bearing particles14US 5,445,363 AHylsa S.A. de C.V. · 1995
- Metallized iron briquet13US 4,116,679 AMidrex Corporation · 1978