G21C 7/12
Means for moving control elements to desired position
Official title: Means for moving control elements to desired position (dropping rods in an emergency G21C9/02)
G21C7/12 (Means for moving control elements to desired position) appears on 323 US grants and 202 published applications in this corpus.
Search patents in G21C- Granted patents
- 323
- Published applications
- 202
- Assignees
- 105
- Inventors
- 691
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 7 | 0 |
| 1978 | 12 | 0 |
| 1979 | 4 | 0 |
| 1980 | 6 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 6 | 0 |
| 1985 | 4 | 0 |
| 1986 | 7 | 0 |
| 1987 | 11 | 0 |
| 1988 | 8 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 13 | 0 |
| 1992 | 11 | 0 |
| 1993 | 8 | 0 |
| 1994 | 10 | 0 |
| 1995 | 8 | 0 |
| 1996 | 8 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 3 |
| 2003 | 1 | 2 |
| 2004 | 0 | 0 |
| 2005 | 1 | 2 |
| 2006 | 0 | 1 |
| 2007 | 1 | 4 |
| 2008 | 1 | 0 |
| 2009 | 1 | 2 |
| 2010 | 0 | 6 |
| 2011 | 0 | 4 |
| 2012 | 1 | 9 |
| 2013 | 4 | 26 |
| 2014 | 6 | 11 |
| 2015 | 3 | 14 |
| 2016 | 9 | 14 |
| 2017 | 16 | 7 |
| 2018 | 15 | 14 |
| 2019 | 18 | 8 |
| 2020 | 12 | 13 |
| 2021 | 8 | 11 |
| 2022 | 17 | 16 |
| 2023 | 10 | 10 |
| 2024 | 5 | 7 |
| 2025 | 11 | 12 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Nuclear reactor and method of opening a nuclear reactor16 Jun 2026US 12,658,331 B2Rolls-Royce Smr Limited
- Integrated head package10 Mar 2026US 12,573,514 B2Rolls-Royce Smr Limited
- Control rod remote holdout mechanism30 Dec 2025US 12,512,228 B2BWXT Advanced Technologies LLC
- Nuclear reactor head, nuclear reactor comprising such a nuclear reactor head and method of maintaining a nuclear reactor16 Dec 2025US 12,500,005 B2Framatome
- Control rod remote disconnect mechanism7 Oct 2025US 12,437,886 B2BWXT Advanced Technologies LLC
- Control rod remote disconnect mechanism11 Jun 2026US 2026/0162838 A1BWXT Advanced Technologies LLC
- Nuclear reactor core architecture with enhanced heat transfer and safety9 Apr 2026US 2026/0100291 A1Loki Mmr Inc.
- Control rod apparatus for small modular reactor, and small modular reactor comprising same19 Mar 2026US 2026/0081044 A1Dunedin Energy Systems Limited
- Abnormality detection device, abnormality detection method, and program for control rod drive device5 Mar 2026US 2026/0066143 A1Hitachi GE Vernova Nuclear Energy, Ltd.
- Control rod drive mechanism with drive shaft hold out mechanism12 Feb 2026US 2026/0045378 A1NuScale Power, LLC
Most cited
By later US patents
- Method and apparatus for preventing relative rotation of tube members in a control rod drive mechanism96US 6,275,556 B1Westinghouse Electric Corp. · 2001
- Nuclear reactor internals construction and failed fuel rod detection system41US 3,940,311 AWestinghouse Electric Corp. · 1976
- Mechanical design of a light water breeder reactor33US 3,957,575 AThe United States of America as represented by the United States Energy Research and Development Administration · 1976
- 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