F27B 3/085
Arc furnaces
Official title: {Arc furnaces}
F27B3/085 (Arc furnaces) appears on 364 US grants and 275 published applications in this corpus.
Search patents in F27B- Granted patents
- 364
- Published applications
- 275
- Assignees
- 245
- Inventors
- 888
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 10 | 0 |
| 1984 | 7 | 0 |
| 1985 | 7 | 0 |
| 1986 | 5 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 10 | 0 |
| 1990 | 8 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 13 | 0 |
| 1994 | 10 | 0 |
| 1995 | 13 | 0 |
| 1996 | 13 | 0 |
| 1997 | 8 | 0 |
| 1998 | 10 | 0 |
| 1999 | 13 | 0 |
| 2000 | 6 | 0 |
| 2001 | 6 | 5 |
| 2002 | 18 | 4 |
| 2003 | 5 | 6 |
| 2004 | 7 | 10 |
| 2005 | 4 | 4 |
| 2006 | 1 | 2 |
| 2007 | 1 | 4 |
| 2008 | 1 | 5 |
| 2009 | 4 | 7 |
| 2010 | 5 | 4 |
| 2011 | 3 | 7 |
| 2012 | 6 | 12 |
| 2013 | 2 | 11 |
| 2014 | 4 | 12 |
| 2015 | 3 | 17 |
| 2016 | 10 | 19 |
| 2017 | 10 | 7 |
| 2018 | 16 | 9 |
| 2019 | 12 | 12 |
| 2020 | 7 | 15 |
| 2021 | 9 | 18 |
| 2022 | 17 | 13 |
| 2023 | 9 | 15 |
| 2024 | 13 | 16 |
| 2025 | 8 | 24 |
| 2026 | 2 | 17 |
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.
- 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.
- Methods for preheating metal-containing pellets20 May 2025US 12,305,926 B2Air Products and Chemicals, Inc.
- DC plasma electric arc furnace for processing solid waste, method of processing solid waste, and products formed from DC plasma electric arc furnace13 May 2025US 12,298,077 B2
- 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 and apparatus for injection of a liquid waste into a molten bath124US 5,436,210 AMolten Metal Technology, Inc. · 1995
- Method and apparatus for producing a product in a regenerator furnace from impure waste containing a non-gasifiable impurity110US 5,640,709 AMolten Metal Technology, Inc. · 1997
- Method and apparatus for producing a product in a regenerator furnace from impure waste containing a non-gasifiable impurity108US 5,640,706 AMolten Metal Technology, Inc. · 1997
- Process and apparatus for melting a furnace charge87US 5,166,950 AL'Air Liquide, Societe Anonyme pour Etude et l'Exploitation des Procedes · 1992
- Methods and apparatus for improved energy efficient control of an electric arc furnace fume extraction system80US 6,748,004 B2Air Liquide America Corporation · 2004