G21C 17/035
Moderator- or coolant-level detecting devices
Official title: Moderator- or coolant-level detecting devices {(indicating or measuring liquid level in general G01F23/00)}
G21C17/035 (Moderator- or coolant-level detecting devices) appears on 59 US grants and 39 published applications in this corpus.
Search patents in G21C- Granted patents
- 59
- Published applications
- 39
- Assignees
- 34
- Inventors
- 158
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 1 | 5 |
| 2012 | 1 | 2 |
| 2013 | 1 | 8 |
| 2014 | 2 | 6 |
| 2015 | 4 | 2 |
| 2016 | 2 | 0 |
| 2017 | 3 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 2 |
| 2020 | 2 | 4 |
| 2021 | 0 | 2 |
| 2022 | 3 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 2 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System including a bypass pipe that routes some sodium coolant from a primary pump discharge upward to sodium measuring instruments located near a nuclear reactor head25 Aug 2026US 12,718,961 B2TerraPower, LLC
- Fluid level control system for a molten fuel salt sampling tank in a nuclear reactor system14 Apr 2026US 12,603,187 B2Abilene Christian University
- Water level measurement system12 Aug 2025US 12,385,772 B2Korea Hydro & Nuclear Power Co., Ltd.
- Reactor condition controlled check valve permits coolant to flow from a reservoir to an isolation condenser chamber20 May 2025US 12,308,130 B2GE-Hitachi Nuclear Energy Americas LLC
- Radiation resistant circuit device, pressure transmission device, and nuclear power plant measurement system2 Jan 2024US 11,862,631 B2Hitachi, Ltd.
- Nuclear Reactor Fluid Level Control System16 Jan 2025US 2025/0022624 A1Abilene Christian University
- Primary sodium pump bypass instrumentation modules8 Aug 2024US 2024/0266084 A1TerraPower, LLC
- Water level measurement system16 Nov 2023US 2023/0366719 A1Korea Hydro & Nuclear Power Co., Ltd.
- Isolation condenser systems for very simplified boiling water reactors18 Mar 2021US 2021/0082589 A1GE-Hitachi Nuclear Energy Americas LLC
- Radiation Resistant Circuit Device, Pressure Transmission Device, and Nuclear Power Plant Measurement System18 Feb 2021US 2021/0050348 A1Hitachi, Ltd.
Most cited
By later US patents
- Methods and apparatus for time domain reflectometry determination of relative proportion, fluid inventory and turbulence49US 4,786,857 A1988
- Method for electromagnetic ultrasonic conversion for monitoring the fill level and bubble formation in enclosures containing liquid41US 4,934,191 ASiemens Aktiengesellschaft · 1990
- Guide tube inserted liquid level sensor36US 4,449,403 A1984
- Hermetically sealed ultrasonic transducer system34US 5,295,120 AWestinghouse Electric Corp. · 1994
- Ultrasonic liquid level measurement system31US 5,319,972 AWestinghouse Electric Corp. · 1994