H02H 7/24
Emergency protective circuit arrangements specially adapted for specific types of electric machines
Official title: for spark-gap arresters
H02H7/24 (Emergency protective circuit arrangements specially adapted for specific types of electric machines) appears on 14 US grants and 7 published applications in this corpus.
Search patents in H02H- Granted patents
- 14
- Published applications
- 7
- Assignees
- 13
- Inventors
- 32
- Latest grant
- 20 Jun 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 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 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 2 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Protection of a surge arrester with a better protection against failure from thermal overload in case of a temporary overvoltage in an electrical grid line20 Jun 2023US 11,682,899 B2Hitachi Energy Switzerland AG
- Protection of a surge arrester with a better protection against failure from thermal overload in case of a temporary overvoltage in an electrical grid line3 May 2022US 11,322,934 B2Hitachi Energy Switzerland AG
- Disconnection and switch-over device for overvoltage protection, particularly for DC systems26 Oct 2021US 11,159,013 B2Dehn SE
- Transient overvoltage protection system31 Dec 2019US 10,523,001 B2Citel
- Arrester bypass devices10 Jan 2017US 9,543,745 B2Cooper Technologies Company
- Protection of a surge arrester with a better protection against failure from thermal overload in case of a temporary overvoltage in an electrical grid line4 Aug 2022US 2022/0247170 A1Hitach Energy Switzerland AG
- Disconnection and switch-over device for overvoltage protection, particularly for dc systems20 Feb 2020US 2020/0059089 A1Dehn SE
- Transient overvoltage protection system17 May 2018US 2018/0138697 A1
- Protection of a surge arrester with a better protection against failure from thermal overload in case of a temporary overvoltage in an electrical grid line15 Mar 2018US 2018/0076617 A1Hitachi Energy Switzerland AG
- Arrester Bypass Devices19 Feb 2015US 2015/0049405 A1Cooper Technologies Company
Most cited
By later US patents
- Overvoltage protector30US 4,068,277 ATII Corporation · 1978
- Printed circuit fuse29US 4,477,857 AGTE Network Systems Incorporated · 1984
- Current-limiting surge arrester disconnector22US 4,710,847 A1987
- Surge absorber for protection of communication equipment connected to communication lines10US 5,247,273 AMitsubishi Materials Corporation · 1993
- Electrical components incorporating a temperature responsive device8US 4,717,902 ADubilier PLC · 1988