F27D 2099/0023
Dc arc heating
Official title: {DC arc heating}
F27D2099/0023 (Dc arc heating) appears on 23 US grants and 9 published applications in this corpus.
Search patents in F27D- Granted patents
- 23
- Published applications
- 9
- Assignees
- 17
- Inventors
- 56
- Latest grant
- 15 Aug 2017
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 2 |
| 2002 | 2 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 2 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Process and arrangement for extracting a metal from slag a containing said metal15 Aug 2017US 9,733,016 B2SMS group GmbH
- Method and device for the continuous production of steel using metal charge material8 May 2012US 8,172,922 B2SMS Siemag Aktiengesellschaft
- Method for the continuous or discontinuous extraction of a metal or several metals from a slag that contains the metal or a compound of the metal17 Apr 2012US 8,157,884 B2SMS Siemag Aktiengesellschaft
- Method and device for the continuous production of steel using metal charge material1 Mar 2011US 7,897,100 B2SMS Siemag Aktiengesellschaft
- Concentric electrode DC arc systems and their use in processing waste materials28 Jun 2005US 6,912,354 B2Electro-Petroleum, Inc.
- Dual electrode dc arc furnace13 Nov 2025US 2025/0347465 A1
- Method to supply electric power to furnaces for melting and/or heating metal materials, and corresponding apparatus15 May 2025US 2025/0155195 A1Danieli Automation S.P.A.
- Method and device for the continuous production of steel using metal charge material2 Jun 2011US 2011/0126672 A1SMS Siemag Aktiengesellschaft
- Method for the continuous or discontinuous extraction of a metal or several metals from a slag that contains the metal or a compound of the metal8 Oct 2009US 2009/0249919 A1SMS Siemag Aktiengesellschaft
- Process and Arrangement for Extracting a Metal from Slag a Containing Said Metal27 Aug 2009US 2009/0211398 A1SMS Demag AG
Most cited
By later US patents
- Concentric electrode DC arc systems and their use in processing waste materials35US 5,673,285 AElectro-Pyrolysis, Inc. · 1997
- Direct current electric arc furnace34US 5,526,374 AMannesmann Aktiengesellschaft · 1996
- Work support for vacuum electric furnaces14US 4,246,434 AAbar Corporation · 1981
- DC arc furnace14US 5,590,152 AIshikawajima-Harima Jukogyo Kabushiki Kaisha · 1996
- Apparatus for preheating and charging scrap materials12US 5,513,206 AIshikawajima-Harima Jukogyo Kabushiki Kaisha · 1996