G21C 13/06
Sealing-plugs
Official title: Sealing-plugs (for pressure vessels in general F16J13/00)
G21C13/06 (Sealing-plugs) appears on 225 US grants and 75 published applications in this corpus.
Search patents in G21C- Granted patents
- 225
- Published applications
- 75
- Assignees
- 94
- Inventors
- 393
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 11 | 0 |
| 1978 | 13 | 0 |
| 1979 | 3 | 0 |
| 1980 | 8 | 0 |
| 1981 | 5 | 0 |
| 1982 | 9 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 10 | 0 |
| 1987 | 20 | 0 |
| 1988 | 8 | 0 |
| 1989 | 9 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 10 | 0 |
| 1994 | 9 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 4 | 7 |
| 2004 | 1 | 1 |
| 2005 | 1 | 2 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 3 |
| 2011 | 0 | 1 |
| 2012 | 0 | 4 |
| 2013 | 2 | 4 |
| 2014 | 1 | 3 |
| 2015 | 5 | 7 |
| 2016 | 2 | 2 |
| 2017 | 2 | 3 |
| 2018 | 4 | 7 |
| 2019 | 6 | 7 |
| 2020 | 5 | 4 |
| 2021 | 5 | 4 |
| 2022 | 5 | 2 |
| 2023 | 3 | 3 |
| 2024 | 2 | 5 |
| 2025 | 2 | 3 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Closure head lifting device for a nuclear reactor19 May 2026US 12,633,428 B2Rolls-Royce Smr Limited
- Integrated head package10 Mar 2026US 12,573,514 B2Rolls-Royce Smr Limited
- Fission product trap for salt pipe and pump shaft seals and methods of use thereof24 Feb 2026US 12,562,289 B2
- Nuclear power generation system17 Feb 2026US 12,555,695 B2Rolls-Royce Smr Limited
- Passively-cooled spent nuclear fuel pool system30 Dec 2025US 12,512,230 B2Smr Inventec, LLC
- Fission product trap for salt pipe and pump shaft seals and methods of use thereof21 May 2026US 2026/0142046 A1
- Method for refurbishing a nuclear power plant initially comprising at least one light-water nuclear reactor (lwr), in particular a pressurised water reactor (pwr) or a boiling water reactor (bwr), with at least one integrated modular nuclear reactor (smr)18 Sep 2025US 2025/0292924 A1Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Containment isolation test fixture for leak rate testing27 Mar 2025US 2025/0104880 A1NuScale Power, LLC
- Small nuclear reactor apparatus and operation method thereof6 Feb 2025US 2025/0046478 A1Korea Hydro & Nuclear Power Co., Ltd.
- Nuclear power plant system12 Sep 2024US 2024/0300061 A1Rolls-Royce Smr Limited
Most cited
By later US patents
- Ultrasonic dip seal maintenance system51US 4,116,766 AThe United States of America as represented by the Department of Energy · 1978
- Sealed head access area enclosure43US 4,078,968 AThe United States Government as represented by the U. S. Department of Energy · 1978
- Plugging apparatus39US 4,393,899 ATokyo Shibaura Denki Kabushiki Kaisha · 1983
- Nozzle dam translocating system36US 4,959,192 ATennesse Valley Authority · 1990
- Nozzle dam remote installation system and technique36US 5,042,861 ATennessee Valley Authority · 1991