H05B 7/20
Direct heating by arc discharge, i.e. where at least one end of
Official title: Direct heating by arc discharge, i.e. where at least one end of the arc directly acts on the material to be heated, including additional resistance heating by arc current flowing through the material to be heated
H05B7/20 (Direct heating by arc discharge, i.e. where at least one end of) appears on 52 US grants and 43 published applications in this corpus.
Search patents in H05B- Granted patents
- 52
- Published applications
- 43
- Assignees
- 49
- Inventors
- 146
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 3 |
| 2015 | 0 | 2 |
| 2016 | 1 | 5 |
| 2017 | 2 | 3 |
| 2018 | 3 | 2 |
| 2019 | 2 | 3 |
| 2020 | 3 | 5 |
| 2021 | 2 | 0 |
| 2022 | 6 | 6 |
| 2023 | 1 | 0 |
| 2024 | 2 | 2 |
| 2025 | 3 | 4 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Converter device and electric power supply apparatus4 Aug 2026US 12,698,937 B2Danieli Automation S.P.A.
- Method and device for regenerating granular activated carbon by arc initiation and discharge11 Nov 2025US 12,466,736 B2Zhejiang Qizheng Environmental Protection Technology Co. Ltd
- Video analysis-based algorithm for triggering power cutback in vacuum arc remelting17 Jun 2025US 12,332,611 B2Titanium Metals Corporation
- Electric arc grill25 Feb 2025US 12,232,649 B1
- Split roof for a metallurgical furnace10 Dec 2024US 12,163,738 B2Systems Spray-Cooled, Inc.
- Electromagnetic reactor9 Jul 2026US 2026/0197910 A1
- Apparatus for producing a metallic product and use of an apparatus2 Jul 2026US 2026/0183834 A1SMS group GmbH
- Electric furnace equipment and method for manufacturing molten metal8 Jan 2026US 2026/0009096 A1Posco
- A system and method for bottom electrode compound bottom blowing of multi-media of DC electric arc furnace23 Oct 2025US 2025/0327143 A1Cisdi Thermal & Environmental Engineering Co., Ltd
- Operating method for an arc furnace10 Apr 2025US 2025/0119991 A1Primetals Technologies Germany GmbH
Most cited
By later US patents
- Method and device for producing three-dimensional bodies79US 5,786,562 AArcam AB · 1998
- Inductively coupled plasma arc device33US 8,904,749 B2Foret Plasma Labs, LLC · 2014
- High purity silicon production by arc heater reduction of silicon intermediates20US 4,102,764 AWestinghouse Electric Corp. · 1978
- Arc melting and casting method and apparatus thereof18US 4,762,165 AKabushiki Kaisha Morita Seisakusho · 1988
- Polyphase arc heater system17US 4,013,867 AWestinghouse Electric Corp. · 1977