F27D 3/1536
Devices for plugging tap holes
Official title: {Devices for plugging tap holes, e.g. plugs stoppers}
F27D3/1536 (Devices for plugging tap holes) appears on 75 US grants and 58 published applications in this corpus.
Search patents in F27D- Granted patents
- 75
- Published applications
- 58
- Assignees
- 61
- Inventors
- 179
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 5 |
| 2003 | 3 | 2 |
| 2004 | 2 | 4 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 5 |
| 2011 | 3 | 7 |
| 2012 | 2 | 3 |
| 2013 | 2 | 2 |
| 2014 | 2 | 1 |
| 2015 | 4 | 2 |
| 2016 | 2 | 3 |
| 2017 | 1 | 4 |
| 2018 | 3 | 3 |
| 2019 | 2 | 2 |
| 2020 | 3 | 2 |
| 2021 | 2 | 2 |
| 2022 | 1 | 3 |
| 2023 | 2 | 2 |
| 2024 | 5 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Manipulator arm, and manipulator comprising a manipulator arm25 Nov 2025US 12,480,712 B2Tmt Tapping-Measuring-Technology Sarl
- Tap hole plug gun31 Dec 2024US 12,181,222 B2Tmt Tapping-Measuring-Technology Sarl
- Device and method for filling a tap hole of an electric arc furnace with refractory filling material26 Nov 2024US 12,152,283 B2Badische Stahl-Engineering GmbH
- Sliding closure for a metallurgical vessel30 Apr 2024US 11,969,785 B2Refractory Intellectual Property GmbH & Co.KG
- Casting furnace featuring submerged, mechanical control of liquid level9 Apr 2024US 11,951,535 B1Zhejiang Hailiang Co., Ltd.
- Manipulator arm, and manipulator comprising a manipulator arm13 Feb 2025US 2025/0052499 A1Tmt Tapping-Measuring-Technology Sarl
- Device and method for filling a tap hole of an electric arc furnace with refractory filling material24 Aug 2023US 2023/0265534 A1Badische Stahl-Engineering GmbH
- Sliding closure for a metallurgical vessel9 Feb 2023US 2023/0042291 A1Refractory Intellectual Property GmbH & Co.KG
- Steelmaking taphole slag retardant device3 Nov 2022US 2022/0349653 A1Jdss Ltd.
- Taphole plugging gun30 Jun 2022US 2022/0205722 A1Tmt Tapping-Measuring-Technology Sarl
Most cited
By later US patents
- Slag retaining device for use in converters, ladles, or the like19US 4,709,903 A1987
- Method and apparatus for preventing the inclusion of slag into the molten steel tapped from a converter14US 4,431,169 AKurosaki Refractories Co., Ltd. · 1984
- Device for introducing gas into molten metal in controlled streams12US 4,538,795 A1985
- Device for introducing gas into molten metal11US 4,632,367 A1986
- Induction melting furnace with metered discharge9US 6,819,704 B2Inductotherm Corp. · 2004