G21C
Nuclear reactors
Official title: NUCLEAR REACTORS (fusion reactors, hybrid fission-fusion reactors G21B; nuclear explosives G21J)
G21C (Nuclear reactors) appears on 9,960 US grants and 5,542 published applications in this corpus.
Search patents in G21C- Granted patents
- 9,960
- Published applications
- 5,542
- Assignees
- 1,675
- Inventors
- 15,176
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 297 | 0 |
| 1977 | 262 | 0 |
| 1978 | 271 | 0 |
| 1979 | 145 | 0 |
| 1980 | 189 | 0 |
| 1981 | 229 | 0 |
| 1982 | 181 | 0 |
| 1983 | 155 | 0 |
| 1984 | 164 | 0 |
| 1985 | 181 | 0 |
| 1986 | 240 | 0 |
| 1987 | 491 | 0 |
| 1988 | 323 | 0 |
| 1989 | 289 | 0 |
| 1990 | 221 | 0 |
| 1991 | 277 | 0 |
| 1992 | 276 | 0 |
| 1993 | 314 | 0 |
| 1994 | 296 | 0 |
| 1995 | 201 | 0 |
| 1996 | 182 | 0 |
| 1997 | 175 | 0 |
| 1998 | 193 | 0 |
| 1999 | 161 | 0 |
| 2000 | 86 | 0 |
| 2001 | 136 | 27 |
| 2002 | 138 | 113 |
| 2003 | 128 | 133 |
| 2004 | 92 | 109 |
| 2005 | 89 | 121 |
| 2006 | 47 | 142 |
| 2007 | 52 | 139 |
| 2008 | 62 | 150 |
| 2009 | 65 | 200 |
| 2010 | 91 | 262 |
| 2011 | 103 | 261 |
| 2012 | 121 | 284 |
| 2013 | 188 | 347 |
| 2014 | 263 | 283 |
| 2015 | 196 | 259 |
| 2016 | 219 | 267 |
| 2017 | 261 | 255 |
| 2018 | 230 | 279 |
| 2019 | 258 | 208 |
| 2020 | 271 | 311 |
| 2021 | 227 | 254 |
| 2022 | 236 | 275 |
| 2023 | 190 | 235 |
| 2024 | 199 | 257 |
| 2025 | 162 | 187 |
| 2026 | 137 | 184 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- G21C 3/00Reactor fuel elements and their assemblies2,776
- G21C 17/00Monitoring2,347
- G21C 19/00Arrangements for treating, for handling, or for facilitating the handling of, fuel2,257
- G21C 15/00Cooling arrangements within the pressure vessel containing the core1,368
- G21C 7/00Control of nuclear reaction1,221
- G21C 13/00Pressure vessels1,208
- G21C 1/00Reactor types1,091
- G21C 9/00Emergency protection arrangements structurally associated with the reactor757
All 12 main groupsShow fewer
Recent patents
- Steel plate composite wall panel structures, such as for use in nuclear reactor buildings, and associated systems and methods6 Oct 2026US 12,753,602 B2NuScale Power, LLC
- Real-time change detection monitoring using isotopic ratio signatures6 Oct 2026US 12,754,332 B2UT-Battelle, LLC
- Sulfur blanket6 Oct 2026US 12,755,853 B2Beam Alpha, Inc.
- In-vessel natural circulation alkali metal reactor system, purification system, and associated methods6 Oct 2026US 12,755,855 B2Oklo Inc.
- Fission product extraction system and methods of use thereof6 Oct 2026US 12,755,856 B2Abilene Christian University
- Sintering additives for improved microstructure control8 Oct 2026US 2026/0308070 A1UT-Battelle, LLC
- Neutron radiation shielding material, shielding material for semiconductor device, package for semiconductor device, shielding material for nuclear reactor, nuclear reactor containment vessel, nuclear reactor building, shielding material for nuclear fusion reactor, nuclear fusion reactor, and nuclear fusion reactor building8 Oct 2026US 2026/0311898 A1Dexerials Corporation
- Leak containment and support housing system8 Oct 2026US 2026/0311899 A1
- Method calibrating power monitors for molten salt reactors at low power8 Oct 2026US 2026/0311900 A1Abilene Christian University
- Nuclear reactor loading system and methods of use thereof8 Oct 2026US 2026/0311901 A1Abilene Christian University
Most cited
By later US patents
- Plant maintenance with predictive diagnostics387US 5,311,562 AWestinghouse Electric Corp. · 1994
- Gas cooled nuclear reactor346US 4,504,439 AHochtemperatur-Reaktorbau GmbH · 1985
- Flexible cable243US 5,174,164 AWestinghouse Electric Corp. · 1992
- Modular observation crawler and sensing instrument and method for operating same200US 6,450,104 B1North Carolina State University · 2002
- Alkali metal leak detection method and apparatus188US 3,969,077 AVarian Associates, Inc. · 1976