F27D 1/1816
Removable covers specially adapted for arc furnaces
Official title: {Removable covers specially adapted for arc furnaces}
F27D1/1816 (Removable covers specially adapted for arc furnaces) appears on 97 US grants and 36 published applications in this corpus.
Search patents in F27D- Granted patents
- 97
- Published applications
- 36
- Assignees
- 61
- Inventors
- 170
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 0 | 0 |
| 1989 | 5 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 1 |
| 2002 | 2 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 2 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 2 |
| 2014 | 2 | 4 |
| 2015 | 0 | 2 |
| 2016 | 4 | 1 |
| 2017 | 2 | 1 |
| 2018 | 2 | 2 |
| 2019 | 2 | 2 |
| 2020 | 3 | 3 |
| 2021 | 1 | 0 |
| 2022 | 1 | 2 |
| 2023 | 2 | 2 |
| 2024 | 1 | 2 |
| 2025 | 2 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Spray-cooled furnace roof with gravity drain14 Oct 2025US 12,442,596 B2Systems Spray-Cooled, Inc.
- Metallurgical furnace having an integrated off-gas hood6 May 2025US 12,292,237 B2Systems Spray-Cooled, Inc.
- Split roof for a metallurgical furnace10 Dec 2024US 12,163,738 B2Systems Spray-Cooled, Inc.
- Metallurgical furnace having an integrated off-gas hood14 Nov 2023US 11,815,313 B2Systems Spray-Cooled, Inc.
- Drain pump for a spray-cooled metallurgical furnace23 May 2023US 11,656,028 B2Systems Spray-Cooled, Inc.
- Spray-cooled furnace roof with gravity drain22 Jan 2026US 2026/0022890 A1Systems Spray-Cooled, Inc.
- Melt transportation apparatus and melt transportation method19 Sep 2024US 2024/0307953 A1Posco
- Metallurgical furnace having an integrated off-gas hood8 Feb 2024US 2024/0044580 A1Systems Spray-Cooled, Inc.
- Spray-cooled furnace roof with gravity drain7 Sep 2023US 2023/0280096 A1Systems Spray-Cooled, Inc.
- Side-supported cantilever furnace roof8 Jun 2023US 2023/0175779 A1Systems Spray-Cooled, Inc.
Most cited
By later US patents
- Vessel for metal smelting furnace39US 4,207,060 ADemag Aktiengesellschaft · 1980
- Furnace cooling system and method38US 4,715,042 AUnion Carbide Corporation · 1987
- Cooling system and method for molten material handling vessels33US 4,815,096 AUnion Carbide Corporation · 1989
- Furnace cooling system and method28US 4,813,055 AUnion Carbide Corporation · 1989
- Cooling system for furnace roof having a removable delta26US 5,115,184 AUCAR Carbon Technology Corporation · 1992