H01H 33/563
Comprising means for monitoring the density of the insulating gas
Official title: {comprising means for monitoring the density of the insulating gas}
H01H33/563 (Comprising means for monitoring the density of the insulating gas) appears on 59 US grants and 49 published applications in this corpus.
Search patents in H01H- Granted patents
- 59
- Published applications
- 49
- Assignees
- 36
- Inventors
- 146
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 2 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 0 | 2 |
| 2015 | 1 | 2 |
| 2016 | 3 | 1 |
| 2017 | 0 | 3 |
| 2018 | 5 | 4 |
| 2019 | 1 | 1 |
| 2020 | 3 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 12 |
| 2023 | 0 | 7 |
| 2024 | 14 | 5 |
| 2025 | 5 | 2 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and apparatus for gas leak detection18 Aug 2026US 12,710,334 B2ABB Schweiz AG
- Gas monitoring system and respective method17 Feb 2026US 12,555,729 B2Hitachi Energy Ltd
- Method for determining a gas quantity in an insulated switchgear10 Feb 2026US 12,546,678 B2Schneider Electric Industries SAS
- Insulating fluid monitoring block and mounting method18 Nov 2025US 12,474,247 B2Siemens Energy Global GmbH & Co. KG
- Gas density relay with online self-checking function, and checking method therefor19 Aug 2025US 12,392,700 B2Shanghai Roye Electric Co., Ltd.
- Simulation verification method and apparatus for gas density relay27 Aug 2026US 2026/0251713 A1Shanghai Roye Electric Co., Ltd.
- Sealed high current switch with internal gas monitor3 Jul 2025US 2025/0216458 A1Honeywell International Inc.
- Method, device, use and installation for gas density monitoring10 Apr 2025US 2025/0116588 A1Trafag AG
- Gas insulated electric apparatus7 Nov 2024US 2024/0372339 A1Hitachi Energy Ltd
- Container for storing and transporting a dielectric insulation medium24 Oct 2024US 2024/0355502 A1Hitachi Energy Ltd
Most cited
By later US patents
- Device for measuring gas density30US 5,421,190 AAsea Brown Boveri AG · 1995
- High voltage transmission switching apparatus with gas monitoring device28US 5,388,451 AConsolidated Electronics Inc. · 1995
- Method and system for monitoring circuit breaker gas pressure16US 5,502,435 A1996
- Method and a system for determining the density of an insulating gas in an electrical apparatus14US 5,693,873 AGEC Alsthom T & D SA · 1997
- Internal fault indicator for power electrical devices13US 6,429,662 B1IFD Corporation · 2002