H01H 33/91
The arc-extinguishing fluid being air or gas
Official title: the arc-extinguishing fluid being air or gas
H01H33/91 (The arc-extinguishing fluid being air or gas) appears on 227 US grants and 121 published applications in this corpus.
Search patents in H01H- Granted patents
- 227
- Published applications
- 121
- Assignees
- 81
- Inventors
- 440
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 4 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 9 | 0 |
| 1981 | 12 | 0 |
| 1982 | 7 | 0 |
| 1983 | 8 | 0 |
| 1984 | 10 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 8 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 3 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 3 |
| 2009 | 0 | 1 |
| 2010 | 2 | 2 |
| 2011 | 2 | 4 |
| 2012 | 3 | 1 |
| 2013 | 2 | 7 |
| 2014 | 4 | 10 |
| 2015 | 9 | 12 |
| 2016 | 13 | 7 |
| 2017 | 7 | 8 |
| 2018 | 9 | 8 |
| 2019 | 8 | 8 |
| 2020 | 7 | 7 |
| 2021 | 8 | 9 |
| 2022 | 5 | 6 |
| 2023 | 4 | 6 |
| 2024 | 4 | 4 |
| 2025 | 7 | 3 |
| 2026 | 1 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Circuit breaker comprising an improved gas flow management9 Jun 2026US 12,651,716 B2GE Vernova Infrastructure Technology LLC
- Electrical switching device25 Nov 2025US 12,482,618 B2Hitachi Energy Ltd
- High voltage circuit-breaker26 Aug 2025US 12,400,816 B2Hitachi Energy Ltd
- Electric current knife switch5 Aug 2025US 12,381,054 B2ABB Schweiz AG
- Compressed gas switch3 Jun 2025US 12,322,935 B2Siemens Energy Global GmbH & Co. KG
- Switchgear16 Jul 2026US 2026/0204500 A1Mitsubishi Electric Corporation
- Self-blast circuit breaker and auxiliary nozzle therefor25 Jun 2026US 2026/0179865 A1Mitsubishi Electric Power Products, Inc.
- Circuit breaker device28 May 2026US 2026/0148916 A1Kabushiki Kaisha Toshiba
- High voltage circuit-breaker30 Apr 2026US 2026/0120986 A1Hitachi Energy Ltd
- High voltage circuit-breaker30 Apr 2026US 2026/0120987 A1Hitachi Energy Ltd
Most cited
By later US patents
- Gas-blast electrical circuit breaker82US 5,095,183 AMerlin Gerin · 1992
- Grounding switch gear device22US 5,543,597 AHitachi, Ltd. · 1996
- Gas-dielectric high-tension interrupter of the arc-puffer type22US 5,723,840 AAnsaldo Industria S.p.A. · 1998
- Gas blast circuit breaker19US 3,941,962 ASprecher & Schuh AG · 1976
- SF6 puffer recloser19US 5,059,753 ACooper Industries, Inc. · 1991