G21B 1/25
Maintenance
Official title: Maintenance, e.g. repair or remote inspection
G21B1/25 (Maintenance) appears on 31 US grants and 22 published applications in this corpus.
Search patents in G21B- Granted patents
- 31
- Published applications
- 22
- Assignees
- 20
- Inventors
- 84
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 2 | 0 |
| 2017 | 0 | 2 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 3 | 3 |
| 2021 | 0 | 0 |
| 2022 | 3 | 0 |
| 2023 | 1 | 2 |
| 2024 | 0 | 5 |
| 2025 | 5 | 4 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Repairing a surface of a divertor or first wall in a tokamak via deposit of refractory metal while maintaining a vacuum7 Jul 2026US 12,676,244 B2Tokamak Energy Ltd
- Techniques for removing a vacuum vessel from a tokamak and related systems and methods2 Dec 2025US 12,488,904 B2Commonwealth Fusion Systems LLC
- Techniques for automated maintenance of a tokamak and related systems and methods28 Oct 2025US 12,456,555 B2Commonwealth Fusion Systems LLC
- Planar coil stellarator including removable field shaping units21 Oct 2025US 12,451,260 B2Thea Energy, Inc.
- Reactor for producing a nuclear fusion reaction27 May 2025US 12,315,644 B2
- Endoscopic plasma monochromatic light analysis system11 Jun 2026US 2026/0160598 A1
- Planar coil stellarator including removable field shaping units15 Jan 2026US 2026/0018307 A1Thea Energy, Inc.
- Renewable wall for fusion reactors23 Oct 2025US 2025/0329475 A1
- Helical fusion reactor, vacuum vessel of helical fusion reactor, and method for maintaining helical fusion reactor18 Sep 2025US 2025/0292917 A1Helical Fusion Co., Ltd.
- Nuclear fusion methods and systems31 Jul 2025US 2025/0246323 A1
Most cited
By later US patents
- Modular fusion power apparatus using disposable core22US 4,859,399 AFDX Patents Holding Company, N.V. · 1989
- Controlled nuclear fusion apparatus20US 4,363,775 AInternational Nuclear Energy Systems Co. · 1982
- In situ regeneration of the first wall of a deuterium-tritium fusion device16US 4,145,250 AGeneral Atomic Company · 1979
- Remotely replaceable tokamak plasma limiter tiles14US 4,816,205 AUnited States Department of Energy · 1989
- Inertial confinement fusion system which decouples life-limited component from plant availability12US 11,387,007 B2Lawrence Livermore National Security, LLC · 2022