H01H 33/302
For fluid insulated switchgear, wherein the insulating fluid is also the working
Official title: {for fluid insulated switchgear, wherein the insulating fluid is also the working fluid}
H01H33/302 (For fluid insulated switchgear, wherein the insulating fluid is also the working) appears on 6 US grants and 4 published applications in this corpus.
Search patents in H01H- Granted patents
- 6
- Published applications
- 4
- Assignees
- 8
- Inventors
- 15
- Latest grant
- 12 Mar 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 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 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 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 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Hydraulic drive for a switchgear12 Mar 2019US 10,229,799 B2Hitachi, Ltd.
- Pulsed interrupter and method of operation9 Jun 2015US 9,054,530 B2General Atomics
- Operating mechanism for high-voltage circuit-breakers28 Sep 1999US 5,959,274 AGEC Alsthom T & D SA
- Gas insulated high-voltage circuit breaker with pneumatic operating mechanism16 Feb 1993US 5,187,339 AMerlin Gerin
- Arc shorting device31 Aug 1982US 4,347,414 ANorthern Engineering Industries plc
- High voltage circuit breaker with particle trap5 Dec 2024US 2024/0404773 A1Hitachi Energy Ltd
- Manipulator for gas-insulated switchgear12 Sep 2024US 2024/0304405 A1Hyosung Heavy Industries Corporation
- Switchgear driving device25 Jan 2018US 2018/0025867 A1Hitachi, Ltd.
- Pulsed interrupter and method of operation30 Oct 2014US 2014/0321013 A1General Atomics
Most cited
By later US patents