E01B 27/022
By devices moving on the track with or without spreading or levelling
Official title: {by devices moving on the track with or without spreading or levelling}
E01B27/022 (By devices moving on the track with or without spreading or levelling) appears on 28 US grants and 18 published applications in this corpus.
Search patents in E01B- Granted patents
- 28
- Published applications
- 18
- Assignees
- 19
- Inventors
- 48
- Latest grant
- 20 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 4 |
| 2018 | 3 | 3 |
| 2019 | 2 | 2 |
| 2020 | 3 | 2 |
| 2021 | 0 | 0 |
| 2022 | 2 | 1 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- One-piece rail boot with integrated flangeway former20 May 2025US 12,305,338 B1Polycorp Ltd.
- Railcar ballast delivery gate15 Nov 2022US 11,498,593 B2Loram Technologies, Inc.
- Track-lifting and ballast-spreading apparatus9 Aug 2022US 11,408,131 B2Herzog Railroad Services, Inc.
- Road rail stoneblower1 Sep 2020US 10,760,221 B2Harsco Technologies LLC
- Aggregate train and methods of loading and unloading21 Jul 2020US 10,717,451 B2Georgetown Rail Equipment Company
- Lock with floating nest29 Jun 2023US 2023/0203760 A1Progress Rail Services Corporation
- Track ballast levelling apparatus3 Nov 2022US 2022/0349128 A1System 7 Ballast Regulator GmbH
- Track-lifting and ballast-spreading apparatus29 Oct 2020US 2020/0340187 A1Herzog Railroad Services, Inc.
- Railcar ballast delivery gate13 Aug 2020US 2020/0255037 A1Montana Hydraulics, L.L.C.
- Machine for repairing a ballast bed with two screening machines, and method for repairing a ballast bed21 Nov 2019US 2019/0352855 A1Matisa Materiel Industriel S.A.
Most cited
By later US patents
- Railroad material cart98US 6,155,175 AERS Industries, Inc. · 2000
- Railroad hopper car with ballast distributing blades and remote control system25US 5,657,700 AHerzog Contracting Corp. · 1997
- Ballast delivery and computation system and method24US 9,175,998 B2Georgetown Rail Equipment Company · 2015
- Railroad hopper car with ballast distributing blade and hopper door and blade control apparatus and method17US 5,423,268 AHerzog Contracting Corp. · 1995
- Ballast delivery and computation system and method14US 8,875,635 B2Georgetown Rail Equipment Company · 2014