G21C 7/00
Control of nuclear reaction
G21C7/00 (Control of nuclear reaction) appears on 1,221 US grants and 811 published applications in this corpus.
Search patents in G21C- Granted patents
- 1,221
- Published applications
- 811
- Assignees
- 289
- Inventors
- 2,354
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 38 | 0 |
| 1977 | 20 | 0 |
| 1978 | 30 | 0 |
| 1979 | 14 | 0 |
| 1980 | 15 | 0 |
| 1981 | 24 | 0 |
| 1982 | 18 | 0 |
| 1983 | 20 | 0 |
| 1984 | 24 | 0 |
| 1985 | 12 | 0 |
| 1986 | 34 | 0 |
| 1987 | 62 | 0 |
| 1988 | 40 | 0 |
| 1989 | 41 | 0 |
| 1990 | 21 | 0 |
| 1991 | 37 | 0 |
| 1992 | 30 | 0 |
| 1993 | 33 | 0 |
| 1994 | 20 | 0 |
| 1995 | 18 | 0 |
| 1996 | 17 | 0 |
| 1997 | 11 | 0 |
| 1998 | 22 | 0 |
| 1999 | 15 | 0 |
| 2000 | 13 | 0 |
| 2001 | 15 | 3 |
| 2002 | 13 | 13 |
| 2003 | 12 | 9 |
| 2004 | 12 | 11 |
| 2005 | 8 | 14 |
| 2006 | 2 | 13 |
| 2007 | 5 | 22 |
| 2008 | 9 | 24 |
| 2009 | 8 | 21 |
| 2010 | 9 | 37 |
| 2011 | 7 | 42 |
| 2012 | 15 | 38 |
| 2013 | 24 | 63 |
| 2014 | 32 | 27 |
| 2015 | 19 | 31 |
| 2016 | 35 | 50 |
| 2017 | 48 | 44 |
| 2018 | 36 | 45 |
| 2019 | 43 | 29 |
| 2020 | 44 | 41 |
| 2021 | 44 | 44 |
| 2022 | 42 | 44 |
| 2023 | 33 | 38 |
| 2024 | 28 | 38 |
| 2025 | 28 | 31 |
| 2026 | 21 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G21C 7/06Control of nuclear reaction: by application of neutron-absorbing material, i.e. material with841
- G21C 7/36Control circuits140
- G21C 7/02Control of nuclear reaction: by using self-regulating properties of reactor materials100
- G21C 7/26Control of nuclear reaction: by displacement of the moderator or parts thereof57
- G21C 7/32Control of nuclear reaction: by varying flow of coolant through the core48
- G21C 7/30Control of nuclear reaction: by displacement of the reactor fuel or fuel43
- G21C 7/28Control of nuclear reaction: by displacement of the reflector or parts thereof38
- G21C 7/005Flux flattening17
All 9 subgroupsShow fewer
Recent patents
- Nuclear reactor and method for control thereof22 Sep 2026US 12,744,130 B2
- Nuclear reactor core with rotating fuel modules and related systems15 Sep 2026US 12,738,386 B2Jacksonville University
- Nuclear reactors having liquid metal alloy fuels and/or moderators4 Aug 2026US 12,700,513 B2
- Fuel element with multi-smear density fuel4 Aug 2026US 12,700,514 B2TerraPower, LLC
- Control rod damping system7 Jul 2026US 12,676,246 B2NuScale Power, LLC
- Apparatus for controlling nuclear reactor and method thereof1 Oct 2026US 2026/0301979 A1Korea Atomic Energy Research Institute
- Nuclear reactor protection systems and methods1 Oct 2026US 2026/0301980 A1NuScale Power, LLC
- A method of operating a molten salt reactor24 Sep 2026US 2026/0290633 A1Saltfoss Energy Aps
- Malfunction prevention valve and nuclear equipment comprising same24 Sep 2026US 2026/0290634 A1Korea Atomic Energy Research Institute
- Molten salt reactor and molten salt reactor system17 Sep 2026US 2026/0279605 A1Iucf-Hyu (Industry-University Cooperation Foundation Hanyang
Most cited
By later US patents
- Underground nuclear power station using self-regulating heat-pipe controlled reactors98US 4,851,183 AThe United States of America as represented by the United States Department of Energy · 1989
- Method and apparatus for preventing relative rotation of tube members in a control rod drive mechanism96US 6,275,556 B1Westinghouse Electric Corp. · 2001
- Plant monitoring and diagnosing method and system, as well as plant equipped with the system63US 5,817,958 AHitachi, Ltd. · 1998
- Method for monitoring the emplacement of a transportable element and the tightness of its joint with a fixed structure, and the use of this method51US 5,182,076 AFramatome · 1993
- Control cell nuclear reactor core49US 4,285,769 AGeneral Electric Company · 1981