G21C 7/117
Clusters of control rods
Official title: Clusters of control rods; Spider construction
G21C7/117 (Clusters of control rods) appears on 97 US grants and 56 published applications in this corpus.
Search patents in G21C- Granted patents
- 97
- Published applications
- 56
- Assignees
- 31
- Inventors
- 168
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 13 | 0 |
| 1988 | 4 | 0 |
| 1989 | 9 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 0 | 1 |
| 2012 | 0 | 5 |
| 2013 | 4 | 5 |
| 2014 | 3 | 4 |
| 2015 | 1 | 2 |
| 2016 | 5 | 4 |
| 2017 | 2 | 1 |
| 2018 | 4 | 5 |
| 2019 | 5 | 3 |
| 2020 | 3 | 2 |
| 2021 | 2 | 2 |
| 2022 | 4 | 2 |
| 2023 | 2 | 5 |
| 2024 | 3 | 2 |
| 2025 | 4 | 3 |
| 2026 | 0 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Control rod remote holdout mechanism30 Dec 2025US 12,512,228 B2BWXT Advanced Technologies LLC
- Control rod remote disconnect mechanism7 Oct 2025US 12,437,886 B2BWXT Advanced Technologies LLC
- Control rod remote holdout mechanism13 May 2025US 12,300,396 B2BWXT Advanced Technologies LLC
- Control rod remote disconnect mechanism6 May 2025US 12,293,846 B2BWXT Advanced Technologies LLC
- Control rods for light water reactors31 Dec 2024US 12,183,474 B2Westinghouse Electric Corp.
- Control rod remote disconnect mechanism11 Jun 2026US 2026/0162838 A1BWXT Advanced Technologies LLC
- Control rod fixing mechanism for control rod assembly using bolted tight fit4 Jun 2026US 2026/0155266 A1Kepco Nuclear Fuel Co., Ltd.
- Control rod assembly with enhanced control rod worth21 May 2026US 2026/0142043 A1Kepco Nuclear Fuel Co., Ltd.
- Control rod assembly with enhanced control rod worth using 28 neutron absorber rods21 May 2026US 2026/0142044 A1Kepco Nuclear Fuel Co., Ltd.
- Control rod assembly with enhanced control rod worth using highly enriched b4c21 May 2026US 2026/0142045 A1Kepco Nuclear Fuel Co., Ltd.
Most cited
By later US patents
- Reconstitutable control assembly having removable control rods with detachable split upper end plugs33US 5,141,711 AWestinghouse Electric Corp. · 1992
- Light water reactor core and fuel assembly31US 6,512,805 B1Hitachi, Ltd. · 2003
- Guide tube flow diffuser29US 4,231,843 AWestinghouse Electric Corp. · 1980
- Displacer rod for use in a mechanical spectral shift reactor26US 4,432,934 AWestinghouse Electric Corp. · 1984
- Rod cluster having improved vane configuration25US 4,863,678 AWestinghouse Electric Corp. · 1989