G21C 3/18
Internal spacers or other non-active material within the casing
Official title: Internal spacers or other non-active material within the casing, e.g. compensating for expansion of fuel rods or for compensating excess reactivity (interlayers G21C3/20)
G21C3/18 (Internal spacers or other non-active material within the casing) appears on 100 US grants and 63 published applications in this corpus.
Search patents in G21C- Granted patents
- 100
- Published applications
- 63
- Assignees
- 49
- Inventors
- 217
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 9 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 9 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 0 | 2 |
| 2003 | 0 | 2 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 5 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 2 | 2 |
| 2013 | 0 | 3 |
| 2014 | 3 | 1 |
| 2015 | 2 | 1 |
| 2016 | 2 | 4 |
| 2017 | 2 | 3 |
| 2018 | 0 | 2 |
| 2019 | 3 | 1 |
| 2020 | 2 | 7 |
| 2021 | 3 | 6 |
| 2022 | 10 | 9 |
| 2023 | 4 | 5 |
| 2024 | 2 | 0 |
| 2025 | 2 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fuel cladding covered by a mesh4 Aug 2026US 12,700,515 B2Westinghouse Electric Corp.
- Method of forming a unitary nuclear fuel segment by heat bonding a thermally conductive layer deposited on a first fuel layer to a thermally conductive layer deposited on a second fuel layer13 Jan 2026US 12,525,368 B2Westinghouse Electric Corp.
- Fuel rod having heat transfer liquid filling the gap between fuel pellets and cladding tube9 Sep 2025US 12,412,672 B2Westinghouse Electric Corp.
- Passive reactivity control in a nuclear fission reactor8 Apr 2025US 12,272,466 B2TerraPower, LLC
- Fission reactor with segmented cladding bodies having cladding arms with involute curve shape5 Nov 2024US 12,136,497 B2BWXT Advanced Technologies LLC
- Nuclear fuel assembly and a method of manufacture thereof28 May 2026US 2026/0148872 A1Westinghouse Electric Corp.
- Coupon Sampler, System and Methods of Use Thereof30 Jan 2025US 2025/0035537 A1Abilene Christian University
- Nuclear fuel element16 Jan 2025US 2025/0022621 A1TerraPower, LLC
- Fission Reactor with Segmented Cladding Bodies Having Cladding Arms with Involute Curve Shape16 Jan 2025US 2025/0022622 A1BWXT Advanced Technologies LLC
- Fuel cladding covered by a mesh16 Nov 2023US 2023/0368931 A1Westinghouse Electric Corp.
Most cited
By later US patents
- Method for making fuel cladding having zirconium barrier layers and inner liners35US 5,383,228 AGeneral Electric Company · 1995
- Nuclear fuel assembly34US 6,275,557 B1ABB Atom AB · 2001
- Nuclear reactor core having nuclear fuel and composite burnable absorber arranged for power peaking and moderator temperature coefficient control27US 5,075,075 AWestinghouse Electric Corp. · 1991
- Fuel assembly for nuclear reactor26US 5,068,082 AKabushiki Kaisha Toshiba · 1991
- Nuclear fuel rod containing a hybrid gadolinium oxide, boron carbide burnable absorber25US 4,671,927 AWestinghouse Electric Corp. · 1987