H01B 17/44
Structural association of insulators with corona rings
H01B17/44 (Structural association of insulators with corona rings) appears on 27 US grants and 20 published applications in this corpus.
Search patents in H01B- Granted patents
- 27
- Published applications
- 20
- Assignees
- 23
- Inventors
- 72
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 3 | 1 |
| 2011 | 0 | 3 |
| 2012 | 0 | 0 |
| 2013 | 2 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 3 |
| 2016 | 1 | 0 |
| 2017 | 1 | 2 |
| 2018 | 1 | 2 |
| 2019 | 3 | 3 |
| 2020 | 0 | 0 |
| 2021 | 3 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Wall bushing29 Jul 2025US 12,374,474 B2Hitachi Energy Ltd
- High-voltage insulators having multiple materials16 May 2023US 11,651,874 B2Lawrence Livermore National Security, LLC
- Integrated insulator seal and shield assemblies1 Nov 2022US 11,488,748 B2Hubbell Incorporated
- High voltage seals and structures having reduced electric fields14 Dec 2021US 11,201,031 B2Varex Imaging Corporation
- Corona protection device31 Aug 2021US 11,107,608 B2Hubbell Incorporated
- Wall bushing21 Sep 2023US 2023/0298784 A1Hitachi Energy Switzerland AG
- Integrated insulator seal and shield assemblies16 Dec 2021US 2021/0391102 A1Hubbell Incorporated
- High-voltage insulators having multiple materials21 Oct 2021US 2021/0327615 A1Lawrence Livermore National Security, LLC
- High-voltage insulator having an arc protection ring26 Dec 2019US 2019/0392965 A1
- High voltage seals and structures having reduced electric fields26 Sep 2019US 2019/0295803 A1Varex Imaging Corporation
Most cited
By later US patents
- Dielectric corona rings10US 4,255,615 AThe United States of America as represented by the Secretary of the Navy · 1981
- Apparatus for preventing coronal discharge9US 5,552,566 AReliable Bethea Power Products, Inc. · 1996
- Apparatus for preventing coronal discharge7US 6,455,782 B1Bethea Power Products · 2002
- Modular guyline insulator6US 4,185,161 AThe United States of America as represented by the Secretary of the Navy · 1980
- Insulator sealing and shielding collar assembly6US 6,984,790 B1Hubbell Incorporated · 2006