E01B 3/38
Longitudinal sleepers
Official title: Longitudinal sleepers; Longitudinal sleepers integral or combined with tie-rods; Combined longitudinal and transverse sleepers; Layers of concrete supporting both rails
E01B3/38 (Longitudinal sleepers) appears on 23 US grants and 8 published applications in this corpus.
Search patents in E01B- Granted patents
- 23
- Published applications
- 8
- Assignees
- 18
- Inventors
- 30
- Latest grant
- 10 Aug 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for manufacturing a railway track support, associated railway track support and railway installation10 Aug 2021US 11,085,153 B2Alstom Transport Technologies
- Modular railroad track assembly4 Jul 2017US 9,695,553 B2
- Longitudinal sleeper and damping railway system thereof20 May 2014US 8,727,229 B2Qingdao Nianxin Environment Tech Co., Ltd.
- Prefabricated plinth for supporting a railway track1 Oct 2013US 8,544,763 B2Concrete Systems, Inc.
- Making fixed railway track5 Jan 2010US 7,641,127 B2Hain, Uwe & Hain, Silke
- Method for manufacturing a railway track support, associated railway track support and railway installation6 Dec 2018US 2018/0347119 A1Alstom Transport Technologies
- Support for a panel of a section of guided transport track31 May 2018US 2018/0148896 A1Systra
- Modular railroad track assembly24 Mar 2016US 2016/0083910 A1
- Longitudinal sleeper and damping railway system thereof15 Nov 2012US 2012/0286056 A1Qingdao Nianxin Environment Tech Co., Ltd.
- Prefabricated plinth for supporting a railway track15 Sep 2011US 2011/0220730 A1Concrete Systems, Inc.
Most cited
By later US patents
- Device for fastening a railway track on sleepers disposed end to end21US 4,216,904 A1980
- Reinforcing device for an element of prestressed concrete9US 3,948,010 A1976
- Railroad tie cover7US 4,356,968 AStedef S.A. · 1982
- Railroad track rail6US 4,079,889 AThe Raymond Lee Organization, Inc. · 1978
- Railroad tie cover6US 4,489,884 AStedef S.A. · 1984