H01H 33/22
Selection of fluids for arc-extinguishing
H01H33/22 (Selection of fluids for arc-extinguishing) appears on 85 US grants and 95 published applications in this corpus.
Search patents in H01H- Granted patents
- 85
- Published applications
- 95
- Assignees
- 51
- Inventors
- 229
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 2 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 3 |
| 2013 | 1 | 4 |
| 2014 | 4 | 8 |
| 2015 | 1 | 5 |
| 2016 | 11 | 6 |
| 2017 | 2 | 1 |
| 2018 | 4 | 10 |
| 2019 | 4 | 6 |
| 2020 | 5 | 9 |
| 2021 | 9 | 6 |
| 2022 | 7 | 8 |
| 2023 | 6 | 8 |
| 2024 | 6 | 7 |
| 2025 | 4 | 3 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Application of chambered oil fuse16 Jun 2026US 12,658,396 B2Eaton Intelligent Power Limited
- Electrical apparatus, filing apparatus and storage apparatus27 Jan 2026US 12,537,151 B2AGC Inc.
- Electrical switching device25 Nov 2025US 12,482,618 B2Hitachi Energy Ltd
- Electric current knife switch5 Aug 2025US 12,381,054 B2ABB Schweiz AG
- Switch-fuse module8 Apr 2025US 12,272,510 B2ABB Schweiz AG
- Earth switching device17 Sep 2026US 2026/0279704 A1Hyosung Heavy Industries Corporation
- Method for distributing a mixture in a gaseous state30 Jul 2026US 2026/0218856 A1Air Liquide Electronics Systems
- Gas-insulated electrical apparatus comprising heptafluoroisobutyronitrile and heptafluoroisopropyl(trifluoromethyl)ketone9 Jul 2026US 2026/0196378 A1GE Vernova Infrastructure Technology LLC
- Insulating gas used for electrical insulation or arc extinguishing by replacing sf6 gas and electrical device using same5 Feb 2026US 2026/0038709 A1Korea Electro Technology Research Institute
- High voltage circuit-breaker having an optimized contacts design18 Dec 2025US 2025/0385059 A1GE Vernova Infrastructure Technology LLC
Most cited
By later US patents
- Methods and apparatus for reducing data transmission overhead33US 8,441,965 B2Apple Inc. · 2013
- Gaseous insulators for high voltage electrical equipment29US 4,257,905 AThe United States of America as represented by the United States Department of Energy · 1981
- Gas-insulated electric device29US 4,565,901 AMitsubishi Denki Kabushiki Kaisha · 1986
- Dielectric gas selected from binary mixtures of SF.sub.6, SO.sub.2 and CF.sub.3 CFCF.sub.218US 4,288,651 AElectric Power Research Institute, Inc. · 1981
- Gaseous dielectric mixtures for suppressing carbon formation17US 4,071,461 AAllied Chemical Corporation · 1978