G21D 3/04
Safety arrangements
Official title: Safety arrangements (emergency protection of reactor G21C9/00)
G21D3/04 (Safety arrangements) appears on 348 US grants and 368 published applications in this corpus.
Search patents in G21D- Granted patents
- 348
- Published applications
- 368
- Assignees
- 131
- Inventors
- 1,004
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 8 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 10 | 0 |
| 1988 | 2 | 0 |
| 1989 | 6 | 0 |
| 1990 | 1 | 0 |
| 1991 | 7 | 0 |
| 1992 | 3 | 0 |
| 1993 | 10 | 0 |
| 1994 | 9 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 5 |
| 2003 | 4 | 4 |
| 2004 | 4 | 2 |
| 2005 | 2 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 3 |
| 2008 | 1 | 4 |
| 2009 | 3 | 3 |
| 2010 | 3 | 11 |
| 2011 | 2 | 7 |
| 2012 | 5 | 17 |
| 2013 | 4 | 42 |
| 2014 | 9 | 29 |
| 2015 | 12 | 25 |
| 2016 | 15 | 31 |
| 2017 | 31 | 15 |
| 2018 | 20 | 33 |
| 2019 | 27 | 15 |
| 2020 | 23 | 23 |
| 2021 | 21 | 19 |
| 2022 | 20 | 9 |
| 2023 | 11 | 20 |
| 2024 | 6 | 15 |
| 2025 | 7 | 14 |
| 2026 | 8 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of synthesizing reactor core power distribution for reactor core protection system based on in-core instrument signal using ordinary kriging method12 May 2026US 12,626,830 B2Kepco Nuclear Fuel Co., Ltd.
- Distributed modular nuclear power plant layout architecture12 May 2026US 12,626,831 B2GE-Hitachi Nuclear Energy Americas LLC
- Offshore and marine vessel-based nuclear reactor configuration, deployment and operation5 May 2026US 12,620,501 B2Energie propre Prodigy Ltee / Prodigy Clean Energy Ltd.
- Nuclear reactor protection systems and methods7 Apr 2026US 12,597,529 B2NuScale Power, LLC
- Component interface module with enhanced user convenience24 Mar 2026US 12,585,247 B2Korea Hydro & Nuclear Power Co., Ltd.
- Nuclear reactor protection systems and methods1 Oct 2026US 2026/0301980 A1NuScale Power, LLC
- Safety protection system and test method27 Aug 2026US 2026/0252037 A1Mitsubishi Electric Corporation
- Valve set for safety of nuclear power plant, pressure relief valve set, discharge valve set, and isolation valve27 Aug 2026US 2026/0253755 A1China Nuclear Power Engineering Co., Ltd.
- Containment vacuum breaker13 Aug 2026US 2026/0237532 A1NuScale Power, LLC
- Method and apparatus for measuring activity concentration in the primary circuit of the high temperature gas-cooled reactor30 Jul 2026US 2026/0221299 A1Tsinghua University
Most cited
By later US patents
- Method and apparatus for automatic abnormal events monitor in operating plants243US 4,060,716 ARockwell International Corporation · 1977
- Plant malfunction diagnostic method90US 5,023,045 ADoryokuro Kakunenryo Kaihatsu Jigyodan · 1991
- Complex article tagging with maintenance related information77US 6,859,757 B2Sap SE · 2005
- Generating an integrated graphic display of the safety status of a complex process plant75US 4,675,147 AWestinghouse Electic Corp. · 1987
- Information display system75US 5,859,885 AWestinghouse Electric Corp. · 1999