F27D 11/08
Heating by electric discharge
Official title: Heating by electric discharge, e.g. arc discharge
F27D11/08 (Heating by electric discharge) appears on 256 US grants and 238 published applications in this corpus.
Search patents in F27D- Granted patents
- 256
- Published applications
- 238
- Assignees
- 181
- Inventors
- 646
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 8 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 12 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 4 | 1 |
| 2003 | 2 | 4 |
| 2004 | 2 | 2 |
| 2005 | 4 | 2 |
| 2006 | 0 | 6 |
| 2007 | 7 | 0 |
| 2008 | 1 | 6 |
| 2009 | 0 | 3 |
| 2010 | 2 | 6 |
| 2011 | 1 | 4 |
| 2012 | 3 | 7 |
| 2013 | 1 | 6 |
| 2014 | 4 | 6 |
| 2015 | 4 | 19 |
| 2016 | 2 | 21 |
| 2017 | 11 | 18 |
| 2018 | 18 | 22 |
| 2019 | 13 | 10 |
| 2020 | 15 | 22 |
| 2021 | 14 | 9 |
| 2022 | 18 | 10 |
| 2023 | 8 | 9 |
| 2024 | 10 | 14 |
| 2025 | 3 | 25 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Remelting plant for metals, and method for remelting metals8 Sep 2026US 12,729,415 B2ALD Vacuum Technologies GmbH
- Fabrication of metallic parts by additive manufacturing25 Aug 2026US 12,715,033 B2Elmet Technologies, Inc.
- Non-water cooled consumable electrode vacuum arc furnace for continuous process14 Jul 2026US 12,680,758 B2
- Recombinant virus, composition comprising the same, and uses thereof21 Apr 2026US 12,607,406 B2Academia Sinica
- Power supply device and power supply method for direct current electric arc furnace31 Mar 2026US 12,592,626 B2
- Apparatus for determining energized state of electric arc furnace, operation method for electric arc furnace, and electric arc furnace23 Jul 2026US 2026/0210632 A1Jfe Steel Corporation
- Recombinant virus, composition comprising the same, and uses thereof9 Jul 2026US 2026/0194298 A1Academia Sinica
- Method of smelting steel and method of producing steel30 Apr 2026US 2026/0117332 A1Jfe Steel Corporation
- Pressure ring assembly with wedge connector19 Mar 2026US 2026/0078957 A1
- Electric furnace equipment and method for manufacturing molten metal8 Jan 2026US 2026/0009096 A1Posco
Most cited
By later US patents
- Segmented electric furnace102US 5,132,984 ANorton Company · 1992
- Apparatus for the decomposition of hazardous materials and the like61US 4,431,612 AElectro-Petroleum, Inc. · 1984
- Electromechanical attachment of inert electrode to a current conductor37US 6,264,810 B1Alcoa Inc. · 2001
- Direct current electric arc furnace34US 5,526,374 AMannesmann Aktiengesellschaft · 1996
- Improved arc reactor with advanceable electrode32US 5,046,145 AHydro-Quebec · 1991