C21B 13/004
In a continuous way by reduction from ores
Official title: {in a continuous way by reduction from ores}
C21B13/004 (In a continuous way by reduction from ores) appears on 49 US grants and 87 published applications in this corpus.
Search patents in C21B- Granted patents
- 49
- Published applications
- 87
- Assignees
- 44
- Inventors
- 159
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 3 |
| 2013 | 2 | 4 |
| 2014 | 3 | 3 |
| 2015 | 3 | 6 |
| 2016 | 2 | 6 |
| 2017 | 0 | 3 |
| 2018 | 4 | 2 |
| 2019 | 3 | 1 |
| 2020 | 2 | 6 |
| 2021 | 1 | 2 |
| 2022 | 3 | 10 |
| 2023 | 4 | 14 |
| 2024 | 4 | 5 |
| 2025 | 11 | 13 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for the production of carburized sponge iron28 Jul 2026US 12,692,563 B2HYBRIT Development AB
- Method and device for producing direct reduced metal7 Apr 2026US 12,595,521 B2Greeniron H2 AB
- Method and corresponding apparatus for producing iron from direct reduction of iron ore30 Dec 2025US 12,509,738 B2Danieli & C. Officine Meccaniche SpA
- Production of iron30 Dec 2025US 12,509,745 B2Technological Resources Pty. Limited
- Method for producing sintered ore2 Sep 2025US 12,404,566 B2Jfe Steel Corporation
- Method for manufacturing direct reduced iron with a low carbon content2 Jul 2026US 2026/0185172 A1
- Method for producing metallic iron25 Jun 2026US 2026/0176707 A1Jef Steel Corporation
- A method for manufacturing pig iron in an electrical smelting furnace and associated furnace25 Jun 2026US 2026/0176708 A1
- A direct reduction facility and a method of direct reduction of metal oxide26 Feb 2026US 2026/0055477 A1Luossavaara-Kiirunavaara AB
- A direct reduction facility for reduction of a metal oxide material19 Feb 2026US 2026/0049370 A1Luossavaara-Kiirunavaara AB
Most cited
By later US patents
- Bio-reduction of metal ores integrated with biomass pyrolysis29US 11,753,698 B2Carbon Technology Holdings, LLC · 2023
- Paired straight hearth (PSH) furnaces for metal oxide reduction7US 6,257,879 B12001
- Melt shop layout4US 5,628,958 AIPSCO Enterprises Inc. · 1997
- Apparatus for and method of production of iron, semi steel and reducing gases4US 8,753,422 B22014
- Process and plant for producing hot metal4US 8,926,728 B2Outotec Oyj · 2015