C21B 13/06
In multi-storied furnaces
Official title: in multi-storied furnaces
C21B13/06 (In multi-storied furnaces) appears on 20 US grants and 4 published applications in this corpus.
Search patents in C21B- Granted patents
- 20
- Published applications
- 4
- Assignees
- 12
- Inventors
- 30
- Latest grant
- 25 Aug 2015
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Apparatus and methods for producing direct reduced iron25 Aug 2015US 9,115,413 B2
- Electric furnace for producing molten metal having material recycling capability28 Oct 2014US 8,871,000 B2Midrex Technologies, Inc.
- Method for producing directly reduced iron in a layered furnace28 May 2002US 6,395,057 B1Paul Wurth S. A.
- Apparatus for the production of liquid iron from iron oxide18 Aug 1987US 4,687,183 AHoogovens Groep B.V.
- Method for the production of liquid iron from iron oxide1 Apr 1986US 4,579,588 AHoogovens Groep B.V.
- Facility for producing reduced iron and method for producing reduced iron23 Jan 2025US 2025/0027178 A1Nippon Steel Corporation
- Direct bath smelting process with management of peripheral cold zones at the metal-slag interface21 Dec 2023US 2023/0407422 A1Nucor Corporation
- Apparatus and methods for producing direct reduced iron27 Dec 2012US 2012/0325053 A1
- Electric furnace for producing molten metal having material recycling capability29 Nov 2012US 2012/0297925 A1Midrex Technologies, Inc.
Most cited
By later US patents
- Process of smelting with submerged burner80US 4,203,761 A1980
- Method for producing molten iron by submerged combustion69US 4,238,226 AMidrex Corporation · 1980
- Apparatus for producing molten iron by submerged combustion67US 4,270,740 AMidrex Corporation · 1981
- Method for the direct reduction of iron ore61US 4,160,663 A1979
- Method of reducing ore using a plasma burner12US 4,019,895 ASKF Industrial Trading and Development Company, B.V. · 1977