G21C 7/22
By displacement of a fluid or fluent neutron-absorbing material
Official title: by displacement of a fluid or fluent neutron-absorbing material {, e.g. by adding neutron-absorbing material to the coolant}
G21C7/22 (By displacement of a fluid or fluent neutron-absorbing material) appears on 54 US grants and 44 published applications in this corpus.
Search patents in G21C- Granted patents
- 54
- Published applications
- 44
- Assignees
- 25
- Inventors
- 141
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 3 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 2 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 4 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 2 | 1 |
| 2017 | 1 | 5 |
| 2018 | 3 | 3 |
| 2019 | 1 | 1 |
| 2020 | 4 | 4 |
| 2021 | 1 | 2 |
| 2022 | 5 | 2 |
| 2023 | 3 | 3 |
| 2024 | 3 | 5 |
| 2025 | 1 | 4 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Nuclear reactor and method for control thereof22 Sep 2026US 12,744,130 B2
- Nuclear reactor system inside a borehole28 Apr 2026US 12,614,643 B2Deep Fission, Inc.
- Passive chemical injection system for controlling a nuclear reaction by delivering a neutron-absorbing chemical into a containment vessel27 Jan 2026US 12,537,110 B2NuScale Power, LLC
- Heat exchanger in a borehole receives heat through a rock formation from another borehole which includes a nuclear reactor11 Nov 2025US 12,469,612 B2Deep Fission, Inc.
- Controlling a power output of a nuclear reaction using chemical injection24 Sep 2024US 12,100,523 B2NuScale Power, LLC
- Temperature activated passive shutdown device for a nuclear reactor16 Jul 2026US 2026/0204443 A1Moltex Energy Ltd
- Drillhole nuclear reactor14 Aug 2025US 2025/0259757 A1Deep Fission, Inc.
- Nuclear reactor shutdown system and method of nuclear reactor shutdown5 Jun 2025US 2025/0182917 A1Mitsubishi Heavy Industries, Ltd.
- Gadolinium oxide nano particles in coolant for reactivity control8 May 2025US 2025/0149193 A1Westinghouse Electric Corp.
- Method for controlling a pressurized water reactor, computer program product and control system8 May 2025US 2025/0149197 A1Framatome
Most cited
By later US patents
- Nuclear reactor control method and apparatus26US 8,416,908 B22013
- Reactivity control system and method25US 5,130,078 AGeneral Electric Company · 1992
- Neutron reflector assembly for dynamic spectrum shifting22US 10,734,122 B2TerraPower, LLC · 2020
- Molten fuel nuclear reactor with neutron reflecting coolant21US 10,867,710 B2TerraPower, LLC · 2020
- Boron control system for a nuclear power plant11US 4,225,390 AWestinghouse Electric Corp. · 1980