F27D 21/0028
Devices for monitoring the level of the melt
Official title: {Devices for monitoring the level of the melt}
F27D21/0028 (Devices for monitoring the level of the melt) appears on 67 US grants and 86 published applications in this corpus.
Search patents in F27D- Granted patents
- 67
- Published applications
- 86
- Assignees
- 69
- Inventors
- 219
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 3 | 7 |
| 2004 | 4 | 2 |
| 2005 | 0 | 1 |
| 2006 | 0 | 5 |
| 2007 | 0 | 2 |
| 2008 | 1 | 1 |
| 2009 | 3 | 2 |
| 2010 | 1 | 2 |
| 2011 | 1 | 6 |
| 2012 | 1 | 1 |
| 2013 | 3 | 2 |
| 2014 | 2 | 2 |
| 2015 | 0 | 8 |
| 2016 | 5 | 3 |
| 2017 | 2 | 6 |
| 2018 | 2 | 1 |
| 2019 | 3 | 7 |
| 2020 | 5 | 1 |
| 2021 | 2 | 5 |
| 2022 | 3 | 5 |
| 2023 | 1 | 3 |
| 2024 | 2 | 7 |
| 2025 | 4 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Liquid level detection method and detection apparatus for the same, molten material liquid level detection method and detection apparatus for the same, and method for operating vertical furnace24 Mar 2026US 12,584,690 B2Jfe Steel Corporation
- Residual liquid amount detection method and detection apparatus for the same, residual molten material amount detection method and detection apparatus for the same, and method for operating vertical furnace17 Mar 2026US 12,577,629 B2Jfe Steel Corporation
- Metal material supply device2 Dec 2025US 12,487,030 B2Aisin Takaoka Co., Ltd.
- Refill system with improved utilization rate of ultra-thin glass production process16 Sep 2025US 12,415,741 B2Dowooinsys Co., Ltd.
- Sensor controlled launder flow27 May 2025US 12,311,434 B2Pyrotek, Inc.
- Method for measuring molten material level in blast furnace, device for measuring molten material level in blast furnace, and blast furnace operation method30 Jul 2026US 2026/0218322 A1Jfe Steel Corporation
- Molten material height detection method, molten material height detection apparatus, and method for manufacturing molten material30 Jul 2026US 2026/0219092 A1Jfe Steel Corporation
- Method for determining batch thickness in an all-electric glass tank26 Mar 2026US 2026/0084996 A1Schott AG
- System for the Measurement of the Copper Percentage in White Metal in a Smelting Furnace20 Nov 2025US 2025/0354949 A1Codelcotec SPA
- Electric heating devices and methods for kilns of substrate glass20 Mar 2025US 2025/0093105 A1Caihong Display Devices Co., Ltd.
Most cited
By later US patents
- Molten metal treatment furnace with level control and method112US 6,503,292 B2Alcoa Inc. · 2003
- Molten metal dosing furnace with metal treatment and level control and method101US 6,500,228 B1Alcoa Inc. · 2002
- Instantaneous slag thickness measuring device21US 5,781,008 AAMEPA Engineering GmbH · 1998
- Controlled magnesium melt process, system and components therefor20US 5,643,528 AMusket System Design and Control Inc. · 1997
- Measuring the thickness of materials19US 6,166,681 AUSX Corporation · 2000