E01B 3/20
Sleeper construction for special purposes
Official title: Sleeper construction for special purposes, e.g. with openings for ballast working (sleepers for shiftable track for heavy loads E01B23/12)
E01B3/20 (Sleeper construction for special purposes) appears on 10 US grants and 6 published applications in this corpus.
Search patents in E01B- Granted patents
- 10
- Published applications
- 6
- Assignees
- 8
- Inventors
- 27
- Latest grant
- 7 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method, apparatus and system for lifting railroad structures7 Jan 2025US 12,188,185 B2Enerpac Tool Group Corp.
- Adjustable device for railway to cross active faults23 May 2023US 11,655,595 B1Institute of Geology and Geophysics, Chinese Academy of Sciences
- Automated railroad tie unloading18 Jan 2022US 11,225,758 B1Union Pacific Railroad Company
- Train rail track structure systems9 May 2017US 9,644,323 B2
- Rail system for jacking tower23 Jun 2015US 9,062,419 B2Konecranes PLC
- Method, apparatus and system for lifting railroad structures13 Mar 2025US 2025/0084593 A1Enerpac Tool Group Corp.
- Method, Apparatus and System for Lifting Railroad Structures19 Oct 2023US 2023/0332359 A1Enerpac Tool Group Corp.
- Train Rail Track Structure Systems30 Jun 2016US 2016/0186384 A1
- Rail system for jacking tower18 Sep 2014US 2014/0263685 A1Konecranes PLC
- Sleeper22 Nov 2007US 2007/0267511 A1
Most cited
By later US patents
- Rail cross-tie for LIM transit system17US 5,314,115 ABombardier Inc. · 1994
- Railroad tie10US 5,104,039 ACXT Incorporated · 1992
- Rail support system4US 5,605,281 ABWG Butzbacher Weichenbau GmbH · 1997
- Railway sleeper2US 4,203,549 A1980
- Turnout/crossover section for railway track1US 7,604,205 B2Scott-Track Limited · 2009