C21C 5/4653
Tapholes
Official title: {Tapholes; Opening or plugging thereof}
C21C5/4653 (Tapholes) appears on 123 US grants and 77 published applications in this corpus.
Search patents in C21C- Granted patents
- 123
- Published applications
- 77
- Assignees
- 85
- Inventors
- 296
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 2 |
| 2002 | 5 | 2 |
| 2003 | 2 | 2 |
| 2004 | 3 | 3 |
| 2005 | 1 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 6 |
| 2008 | 0 | 5 |
| 2009 | 6 | 3 |
| 2010 | 1 | 5 |
| 2011 | 3 | 5 |
| 2012 | 5 | 4 |
| 2013 | 3 | 2 |
| 2014 | 5 | 2 |
| 2015 | 2 | 1 |
| 2016 | 1 | 2 |
| 2017 | 1 | 3 |
| 2018 | 2 | 2 |
| 2019 | 2 | 2 |
| 2020 | 1 | 3 |
| 2021 | 4 | 1 |
| 2022 | 2 | 6 |
| 2023 | 2 | 3 |
| 2024 | 3 | 0 |
| 2025 | 2 | 3 |
| 2026 | 0 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Material grinding end effector assembly, subassemblies thereof, and methods for utilizing the same21 Oct 2025US 12,447,539 B2Edw. C. Levy Co.
- Method of heating up furnace bottom, and burner lance used in the method25 Mar 2025US 12,259,184 B2Jfe Steel Corporation
- 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
- Slag blocking device for a metallurgical vessel23 Jul 2026US 2026/0208261 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
- Material grinding end effector assembly, subassemblies thereof, and methods for utilizing the same18 Jun 2026US 2026/0166634 A1Edw. C. Levy Co.
- A method for manufacturing pig iron in an electrical smelting furnace and associated electrical smelting furnace12 Feb 2026US 2026/0043100 A1
- A method for manufacturing pig iron in an electrical smelting furnace and associated electrical smelting furnace29 Jan 2026US 2026/0028687 A1
Most cited
By later US patents
- Electromagnetic valve for controlling the flow of molten, magnetic material55US 5,765,730 AAmerican Iron and Steel Institute · 1998
- Slag retaining device for use in converters, ladles, or the like19US 4,709,903 A1987
- Apparatus and method for tapping a molten metal bath15US 5,939,016 AQuantum Catalytics, L.L.C. · 1999
- Process for tapping a steel-making converter14US 4,010,936 AAikoh Co., Ltd. · 1977
- 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