E01B 11/44
Non-dismountable rail joints
Official title: Non-dismountable rail joints; Welded joints (welding methods B23K)
E01B11/44 (Non-dismountable rail joints) appears on 54 US grants and 34 published applications in this corpus.
Search patents in E01B- Granted patents
- 54
- Published applications
- 34
- Assignees
- 44
- Inventors
- 108
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 2 |
| 2003 | 0 | 1 |
| 2004 | 2 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 2 | 2 |
| 2016 | 0 | 0 |
| 2017 | 1 | 3 |
| 2018 | 1 | 3 |
| 2019 | 1 | 0 |
| 2020 | 1 | 4 |
| 2021 | 0 | 2 |
| 2022 | 1 | 1 |
| 2023 | 1 | 2 |
| 2024 | 3 | 1 |
| 2025 | 2 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Welded rail29 Sep 2026US 12,747,483 B2Nippon Steel Corporation
- Welded rail9 Jun 2026US 12,649,964 B2Nippon Steel Corporation
- Welding unit for welding rails of a track22 Apr 2025US 12,281,448 B2Plasser & Theurer Export Von Bahnbaumaschinen Gesellschaft M. B. H.
- Frog for switches and crossings8 Apr 2025US 12,270,157 B2Vossloh Cogifer
- Method for sealing a casting mould for aluminothermic rail weldings29 Oct 2024US 12,128,496 B2Goldschmidt Holding GmbH
- Manufacturing method of flash butt welded rail1 Oct 2026US 2026/0295710 A1Nippon Steel Corporation
- Zero Emission Railroad Tracks Welder17 Sep 2026US 2026/0273646 A1
- Method and device for welding components, which can be travelled upon, of a track by flash butt welding23 Jul 2026US 2026/0208283 A1Voestalpine Railway Systems GmbH
- Rail grinding machine and method thereof18 Sep 2025US 2025/0290254 A1Sperling Railway Services, Inc.
- Welded rail24 Apr 2025US 2025/0129460 A1Nippon Steel Corporation
Most cited
By later US patents
- Method and system for welding railroad rails64US 6,278,074 B1Lincoln Global.Inc. · 2001
- Method and system for welding railroad rails25US 5,773,779 AThe Lincoln Electric Company · 1998
- Rail welding apparatus incorporating rail restraining device, weld containment device and weld delivery unit23US 6,396,020 B1Holland Company · 2002
- Mobile rail welding machine22US 4,272,664 AFranz Plasser Bahnbaumaschinen-Industriegesellschaft m. b. H. · 1981
- Method and system for welding railroad rails20US 5,877,468 AThe Lincoln Electric Company · 1999