B23K 11/04
Flash butt welding
B23K11/04 (Flash butt welding) appears on 135 US grants and 115 published applications in this corpus.
Search patents in B23K- Granted patents
- 135
- Published applications
- 115
- Assignees
- 97
- Inventors
- 321
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 2 |
| 2002 | 2 | 1 |
| 2003 | 1 | 5 |
| 2004 | 3 | 6 |
| 2005 | 6 | 1 |
| 2006 | 1 | 2 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 4 |
| 2011 | 0 | 4 |
| 2012 | 0 | 7 |
| 2013 | 5 | 7 |
| 2014 | 3 | 2 |
| 2015 | 3 | 6 |
| 2016 | 5 | 10 |
| 2017 | 3 | 6 |
| 2018 | 5 | 1 |
| 2019 | 2 | 5 |
| 2020 | 5 | 8 |
| 2021 | 5 | 6 |
| 2022 | 5 | 4 |
| 2023 | 6 | 4 |
| 2024 | 6 | 4 |
| 2025 | 5 | 9 |
| 2026 | 4 | 9 |
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
- Power cable system having different conductor connecting part, and power cable connection method having different conductors3 Mar 2026US 12,567,519 B2Ls Cable & System Ltd.
- Flash butt welding member and flash butt welding method for providing wheel rim weld part with excellent formability3 Feb 2026US 12,539,554 B2Posco
- Automated geometry and crowning apparatus for use of mobile electric flash-butt welding of railroad rails and rail inserts11 Nov 2025US 12,466,008 B2One Rail Group, LLC
- 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
- Method for increasing hardened layer thickness of a rail head of a flash welded joint of a steel rail and a steel rail16 Jul 2026US 2026/0200019 A1Chengdu Advanced Metal Materials Industry Technology Research Institute Co., Ltd.
- A welding and heat treatment method for a steel rail with deep hardened layer and a steel rail25 Jun 2026US 2026/0176712 A1Chengdu Advanced Metal Materials
Most cited
By later US patents
- Welding quality decision apparatus and welding machine provided with the same75US 6,153,848 AMitsubishi Denki Kabushiki Kaisha · 2000
- Welding assurance control techniques50US 5,367,138 AAutomation International Corp. · 1994
- Flash welding process for field joining of tubulars for expandable applications49US 6,935,429 B2Weatherford/Lamb, Inc. · 2005
- Method and apparatus for expanding a welded connection48US 6,935,430 B2Weatherford/Lamb, Inc. · 2005
- Method and apparatus for flash butt welding railway rails28US 5,270,514 AChemetron-Railway Products, Inc. · 1993