E01B 7/24
Heating of switches
E01B7/24 (Heating of switches) appears on 43 US grants and 34 published applications in this corpus.
Search patents in E01B- Granted patents
- 43
- Published applications
- 34
- Assignees
- 29
- Inventors
- 69
- Latest grant
- 14 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 2 |
| 2014 | 2 | 2 |
| 2015 | 0 | 0 |
| 2016 | 2 | 2 |
| 2017 | 1 | 0 |
| 2018 | 0 | 3 |
| 2019 | 0 | 4 |
| 2020 | 6 | 5 |
| 2021 | 3 | 3 |
| 2022 | 2 | 1 |
| 2023 | 3 | 3 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rail switch heater14 Jan 2025US 12,195,927 B2Backer EHP Inc.
- Edge weather abatement using hyperlocal weather and train activity inputs2 Jan 2024US 11,859,350 B2Norfolk Southern Corporation
- Rail switch heater15 Aug 2023US 11,725,347 B2Backer EHP Inc.
- Braided stainless steel jacketed flexible heating cable20 Jun 2023US 11,683,864 B1Thermal-Flex Systems, Inc.
- Edge weather abatement using hyperlocal weather and train activity inputs25 Apr 2023US 11,634,871 B2Norfolk Southern Corporation
- Rail switch heating peak current mitigation18 Jun 2026US 2026/0173216 A1
- Track switch heater and control system8 Jan 2026US 2026/0009188 A1
- Rail switch heater24 Apr 2025US 2025/0129550 A1Backer EHP Inc.
- Rail switch heater30 Nov 2023US 2023/0383474 A1Backer EHP Inc.
- Edge weather abatement using hyperlocal weather and train activity inputs6 Jul 2023US 2023/0212827 A1Norfolk Southern Corporation
Most cited
By later US patents
- Railroad switch heater34US 4,391,425 A1983
- Rail track heaters33US 4,429,845 AEmerson Electric Co. · 1984
- Rail heating apparatus23US 5,004,190 ABylin Heating Systems, Inc. · 1991
- Railroad switch heater19US 4,195,805 A1980
- Heating cable assembly and connector for railroad switch heating system19US 5,941,482 AThermal-Flex Systems, Inc. · 1999