G01R 31/1281
Of liquids or gases
Official title: {of liquids or gases}
G01R31/1281 (Of liquids or gases) appears on 30 US grants and 33 published applications in this corpus.
Search patents in G01R- Granted patents
- 30
- Published applications
- 33
- Assignees
- 43
- Inventors
- 146
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 3 |
| 2015 | 0 | 2 |
| 2016 | 1 | 0 |
| 2017 | 2 | 0 |
| 2018 | 1 | 1 |
| 2019 | 2 | 2 |
| 2020 | 0 | 4 |
| 2021 | 2 | 5 |
| 2022 | 6 | 2 |
| 2023 | 1 | 4 |
| 2024 | 0 | 2 |
| 2025 | 2 | 3 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fault diagnosis apparatus based on fluorescence multivariate correction analysis of transformer oil28 Jul 2026US 12,693,220 B2Hefei Institutes of Physical Science, Chinese Academy of Sciences
- Simultaneous detection method and system for dissolved gas and partial discharge in insulating oil2 Jun 2026US 12,644,825 B2Chongqing University
- Sensor device for monitoring the dielectric strength of a dielectric fluid, in particular a fluid for the thermal conditioning of a battery5 May 2026US 12,618,891 B2ELTEK S.p.A.
- Evaluating performance of X-ray tube18 Feb 2025US 12,228,602 B2Siemens Healthineers AG
- Fault gas detection system for a liquid filled high voltage transformer28 Jan 2025US 12,210,051 B2Siemens Gamesa Renewable Energy A/S
- Handheld device for the detection of electrostatic discharge12 Feb 2026US 2026/0043840 A1
- Parallel electron swarm parameter calculation method taking ion dynamics into consideration, and related apparatus28 Aug 2025US 2025/0271488 A1Xi' An Jiaotong University
- Analysis method24 Jul 2025US 2025/0237687 A1Japan Aerospace Exploration Agency
- Fault diagnosis apparatus based on fluorescence multivariate correction analysis of transformer oil6 Mar 2025US 2025/0076197 A1Hefei Institutes of Physical Science, Chinese Academy of Sciences
- Simultaneous detection method and system for dissolved gas and partial discharge in insulating oil29 Aug 2024US 2024/0288359 A1Chongqing University
Most cited
By later US patents
- VLF Capacitor corona detection58US 4,245,187 AThe United States of America as represented by the Secretary of the Navy · 1981
- Partial-discharge measuring device15US 5,804,972 AAsea Brown Boveri AG · 1998
- Method and apparatus for diagnosing oil-filled electric apparatus14US 4,502,320 AHitachi, Ltd. · 1985
- Methods and apparatus for monitoring the condition of dielectric liquid in electric discharge machining12US 4,392,110 ANational Research Development Corporation · 1983
- System and method for arc detection using a bias RF generator signal8US 11,536,755 B2MKS Instruments, Inc. · 2022