F27B 3/08
Heated electrically, with or without any other source of heat
Official title: heated electrically, with or without any other source of heat
F27B3/08 (Heated electrically, with or without any other source of heat) appears on 446 US grants and 339 published applications in this corpus.
Search patents in F27B- Granted patents
- 446
- Published applications
- 339
- Assignees
- 292
- Inventors
- 1,028
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 6 | 0 |
| 1983 | 12 | 0 |
| 1984 | 7 | 0 |
| 1985 | 11 | 0 |
| 1986 | 6 | 0 |
| 1987 | 10 | 0 |
| 1988 | 6 | 0 |
| 1989 | 12 | 0 |
| 1990 | 8 | 0 |
| 1991 | 5 | 0 |
| 1992 | 9 | 0 |
| 1993 | 14 | 0 |
| 1994 | 10 | 0 |
| 1995 | 14 | 0 |
| 1996 | 14 | 0 |
| 1997 | 9 | 0 |
| 1998 | 13 | 0 |
| 1999 | 15 | 0 |
| 2000 | 9 | 0 |
| 2001 | 7 | 5 |
| 2002 | 20 | 8 |
| 2003 | 9 | 6 |
| 2004 | 7 | 10 |
| 2005 | 4 | 6 |
| 2006 | 2 | 2 |
| 2007 | 2 | 7 |
| 2008 | 2 | 8 |
| 2009 | 4 | 7 |
| 2010 | 6 | 8 |
| 2011 | 6 | 12 |
| 2012 | 8 | 15 |
| 2013 | 5 | 13 |
| 2014 | 9 | 15 |
| 2015 | 4 | 19 |
| 2016 | 14 | 20 |
| 2017 | 11 | 11 |
| 2018 | 16 | 12 |
| 2019 | 14 | 14 |
| 2020 | 9 | 20 |
| 2021 | 11 | 22 |
| 2022 | 20 | 16 |
| 2023 | 13 | 15 |
| 2024 | 15 | 20 |
| 2025 | 12 | 28 |
| 2026 | 2 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Converter device and electric power supply apparatus4 Aug 2026US 12,698,937 B2Danieli Automation S.P.A.
- Non-water cooled consumable electrode vacuum arc furnace for continuous process14 Jul 2026US 12,680,758 B2
- Carbon dioxide emission reduction system for electric arc furnaces utilizing algae for carbon dioxide absorbtion16 Sep 2025US 12,416,055 B1CIX Inc.
- High-efficiency photonic furnaces for metal production26 Aug 2025US 12,398,954 B2Limelight Steel Inc.
- Heating element, a system and method for melting materials using said heating element29 Jul 2025US 12,372,301 B2Glassflake Ltd.
- Hearth mixture for disposing on the hearth bottom of an electric arc furnace, use of a hearth mixture for disposing on the hearth bottom of an electric arc furnace, electric arc furnace, method for disposing a hearth mixture on the hearth bottom of an electric arc furnace and use of magnesia spinel used in a lining of a cement rotary kiln24 Sep 2026US 2026/0287256 A1Refractory Intellectual Property GmbH & Co.KG
- 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
- System to produce green steel through electric arc furnace with very low ghg emission intensity16 Jul 2026US 2026/0201487 A1Saarloha Advanced Materials Private Limited
- Refractory lining disposed on the bottom of a metallurgical unit for holding a molten metal, method of providing a refractory lining disposed on the bottom of a metallurgical unit for holding a molten metal, and metallurgical unit for holding a molten metal2 Jul 2026US 2026/0185774 A1Refractory Intellectual Property GmbH & Co.KG
- A method for manufacturing pig iron in an electrical smelting furnace and associated furnace25 Jun 2026US 2026/0176708 A1
Most cited
By later US patents
- Method for producing hydrocarbon gas from waste126US 5,395,405 AMolten Metal Technology, Inc. · 1995
- Method and apparatus for injection of a liquid waste into a molten bath124US 5,436,210 AMolten Metal Technology, Inc. · 1995
- Feed processing employing dispersed molten droplets114US 5,744,117 AMolten Metal Technology, Inc. · 1998
- Method and system for injection of a vaporizable material into a molten bath112US 5,679,132 AMolten Metal Technology, Inc. · 1997
- Molten metal treatment furnace with level control and method112US 6,503,292 B2Alcoa Inc. · 2003