G21C 13/073
Closures for reactor-vessels
Official title: Closures for reactor-vessels, e.g. rotatable
G21C13/073 (Closures for reactor-vessels) appears on 99 US grants and 37 published applications in this corpus.
Search patents in G21C- Granted patents
- 99
- Published applications
- 37
- Assignees
- 48
- Inventors
- 162
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 8 | 0 |
| 1978 | 11 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 8 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 10 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 4 | 6 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 3 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 2 | 3 |
| 2014 | 0 | 1 |
| 2015 | 2 | 2 |
| 2016 | 1 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 3 |
| 2019 | 2 | 2 |
| 2020 | 2 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 3 |
| 2025 | 2 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Integrated head package10 Mar 2026US 12,573,514 B2Rolls-Royce Smr Limited
- 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
- Nuclear reactor facility integrated with passive air cooling system21 Jan 2025US 12,205,728 B2GE-Hitachi Nuclear Energy Americas LLC
- Method of heating primary coolant outside of primary coolant loop during a reactor startup operation13 Feb 2024US 11,901,088 B2Smr Inventec, LLC
- 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
- Nuclear steam supply and start-up system, passively-cooled spent nuclear fuel pool system and method therefor, component cooling water system for nuclear power plant, passive reactor cooling system, steam generator for nuclear steam supply system8 Aug 2024US 2024/0266083 A1Smr Inventec, LLC
- Integrated head package18 Jan 2024US 2024/0021331 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
- Modular head assembly and method of retrofitting existing nuclear reactor facilities32US 4,678,623 AWestinghouse Electric Corp. · 1987
- Control rod and/or instrument tree assembly29US 4,045,283 ACombustion Engineering, Inc. · 1977
- Reactor stud hole plug unit23US 4,312,708 AThaxton, Inc. · 1982