E01B 3/18
Composite sleepers
E01B3/18 (Composite sleepers) appears on 6 US grants and 7 published applications in this corpus.
Search patents in E01B- Granted patents
- 6
- Published applications
- 7
- Assignees
- 5
- Inventors
- 10
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 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 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 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 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Polymer-based railroad tie having enhanced ballast interaction2 Jun 2026US 12,644,232 B2Rutgers, The State University of New Jersey
- Polymer-based railroad tie having enhanced ballast interaction28 Mar 2023US 11,613,851 B2Rutgers, The State University of New Jersey
- Composite railway sleeper17 Mar 2020US 10,590,610 B2Greenrail Group S.R.L.
- Composite railway sleeper4 Jul 2017US 9,695,554 B2GREENRAIL S.r.l.
- Method of manufacturing railway sleepers25 Aug 1981US 4,285,115 AArbed S.A.
- Steel monoblock sleeper and method for producing same1 Oct 2026US 2026/0297856 A1Baupoly AG
- Polymer-based railroad tie having enhanced ballast interaction24 Sep 2026US 2026/0286620 A1Rutgers, The State University of New Jersey
- Extruded pvc glass fiber reinforced railroad tie with enhanced thermal and mechanical stability29 Jan 2026US 2026/0028781 A1
- Polymer-based railroad tie having enhanced ballast interaction27 Jul 2023US 2023/0235516 A1Rutgers, The State University of New Jersey
- Polymer-based railroad tie having enhanced ballast interaction10 Sep 2020US 2020/0283962 A1Rutgers, The State University of New Jersey
Most cited
By later US patents
- Composite railroad cross tie with rail support blocks7US 4,113,177 A1978
- Method of manufacturing railway sleepers4US 4,285,115 AArbed S.A. · 1981
- Polymer-based railroad tie having enhanced ballast interaction1US 11,613,851 B2Rutgers, The State University of New Jersey · 2023
- Composite railway sleeper1US 9,695,554 B2GREENRAIL S.r.l. · 2017