C21C 5/527
Charging of the electric furnace
Official title: {Charging of the electric furnace}
C21C5/527 (Charging of the electric furnace) appears on 220 US grants and 223 published applications in this corpus.
Search patents in C21C- Granted patents
- 220
- Published applications
- 223
- Assignees
- 141
- Inventors
- 506
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 5 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 1 |
| 2002 | 6 | 1 |
| 2003 | 2 | 3 |
| 2004 | 3 | 4 |
| 2005 | 2 | 1 |
| 2006 | 0 | 3 |
| 2007 | 2 | 7 |
| 2008 | 3 | 11 |
| 2009 | 1 | 9 |
| 2010 | 9 | 11 |
| 2011 | 14 | 15 |
| 2012 | 5 | 15 |
| 2013 | 9 | 11 |
| 2014 | 8 | 9 |
| 2015 | 10 | 11 |
| 2016 | 10 | 6 |
| 2017 | 7 | 5 |
| 2018 | 5 | 7 |
| 2019 | 4 | 3 |
| 2020 | 5 | 8 |
| 2021 | 5 | 7 |
| 2022 | 3 | 13 |
| 2023 | 4 | 4 |
| 2024 | 8 | 20 |
| 2025 | 16 | 21 |
| 2026 | 3 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Biocarbon pellets with adjustable grindability index16 Jun 2026US 12,655,362 B2Carbon Technology Holdings, LLC
- Iron containing pellets14 Apr 2026US 12,601,029 B2Binding Solutions Ltd
- Method of producing molten iron using electric furnace including video device3 Mar 2026US 12,566,029 B2Jfe Steel Corporation
- Hot metal production from DRI with electric arc heating16 Dec 2025US 12,497,668 B2Kobe Steel, Ltd.
- Method for manufacturing molten iron with electric arc furnace9 Dec 2025US 12,492,439 B2Jfe Steel Corporation
- Method for producing molten iron13 Aug 2026US 2026/0234740 A1Jfe Steel Corporation
- Method for producing molten iron6 Aug 2026US 2026/0226569 A1Jfe Steel Corporation
- System to produce green steel through electric arc furnace with very low ghg emission intensity16 Jul 2026US 2026/0201487 A1Saarloha Advanced Materials Private Limited
- Apparatus for producing a metallic product and use of an apparatus2 Jul 2026US 2026/0183834 A1SMS group GmbH
- Stabilized Agglomerated Compositions Made Using Byproducts from Steelmaking Operations25 Jun 2026US 2026/0176436 A1S. A. Lhoist Recherche et Developpement
Most cited
By later US patents
- Scrap melter and impeller113US 6,723,276 B12004
- Reclaiming and utilizing discarded and newly formed coke breeze, coal fines, and blast furnace revert materials, and related methods28US 5,487,764 ACovol Technologies, Inc. · 1996
- Process for producing an iron melt26US 5,611,838 AVoest-Alpine Industrieanlagenbau GmbH · 1997
- Metallurgical vessel24US 5,332,199 AFuchs Systemtechnik GmbH · 1994
- Treatment of polyvinylchloride19US 5,698,759 A1997