C21B 13/0026
Introduction of iron oxide in the flame of a burner or a
Official title: {introduction of iron oxide in the flame of a burner or a hot gas stream}
C21B13/0026 (Introduction of iron oxide in the flame of a burner or a) appears on 72 US grants and 28 published applications in this corpus.
Search patents in C21B- Granted patents
- 72
- Published applications
- 28
- Assignees
- 43
- Inventors
- 134
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 1 |
| 2002 | 11 | 1 |
| 2003 | 5 | 2 |
| 2004 | 0 | 3 |
| 2005 | 1 | 0 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 3 | 4 |
| 2017 | 0 | 0 |
| 2018 | 3 | 2 |
| 2019 | 0 | 0 |
| 2020 | 3 | 1 |
| 2021 | 0 | 5 |
| 2022 | 3 | 2 |
| 2023 | 1 | 0 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus for the production of molten iron7 Apr 2026US 12,595,520 B2Tata Steel Ijmuiden B.V.
- Direct smelting process with full combustion25 Jun 2024US 12,018,340 B2Tata Steel Nederland Technology B.V.
- Gasifier for organic solid waste by injection into molten iron and slag bath24 Oct 2023US 11,795,407 B2
- Flash ironmaking drop tube furnace system4 Oct 2022US 11,459,626 B2American Iron and Steel Institute
- Method for the recovery of zinc9 Aug 2022US 11,408,054 B2Tata Steel Nederland Technology B.V.
- A method for manufacturing pig iron in an electrical smelting furnace and associated furnace25 Jun 2026US 2026/0176708 A1
- Direct bath smelting process with fast quench of molten material in hot offgas22 Aug 2024US 2024/0279757 A1Nucor Corporation
- Apparatus for the production of molten iron29 Dec 2022US 2022/0411888 A1Tata Steel Ijmuiden B.V.
- Plasma induced fuming furnace8 Dec 2022US 2022/0389536 A1Aurubis Beerse
- Flash ironmaking drop tube furnace system23 Dec 2021US 2021/0395844 A1American Iron and Steel Institute
Most cited
By later US patents
- Method of producing metals and metal alloys78US 6,267,799 B1Technological Resources Pty. Limited · 2001
- Method of producing metals and metal alloys45US 6,083,296 ATechnological Resources Pty. Limited · 2000
- Process of producing molten metals42US 6,143,054 ATechnological Resources Pty. Limited · 2000
- Direct smelting apparatus and process39US 6,379,424 B1Technological Resources Pty. Limited · 2002
- Direct smelting process39US 6,428,603 B1Technological Resources Pty. Limited · 2002