E01B 3/10
Composite sleepers
E01B3/10 (Composite sleepers) appears on 16 US grants and 28 published applications in this corpus.
Search patents in E01B- Granted patents
- 16
- Published applications
- 28
- Assignees
- 12
- Inventors
- 50
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 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 | 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 | 1 |
| 2003 | 1 | 2 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 2 | 1 |
| 2015 | 1 | 2 |
| 2016 | 0 | 4 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 3 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| 2026 | 2 | 4 |
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
- Wood with strengthening coating24 Feb 2026US 12,559,647 B2Tough By Nature, LLC
- Assembled bamboo sleeper and preparation method thereof21 Jan 2025US 12,203,224 B2Hunan Taohuajiang Bamboo Science & Technology Co., Ltd.
- Polymer-based railroad tie having enhanced ballast interaction28 Mar 2023US 11,613,851 B2Rutgers, The State University of New Jersey
- Bamboo railroad tie manufacturing system29 Oct 2019US 10,456,959 B2TieBam, Inc.
- Timber rail crosstie preservation24 Sep 2026US 2026/0286618 A1Copper Care Wood Preservatives, Inc.
- Polymer-based railroad tie having enhanced ballast interaction24 Sep 2026US 2026/0286620 A1Rutgers, The State University of New Jersey
- Application of a highly modified asphalt binder for protection from water intrusion into wooden railroad ties9 Apr 2026US 2026/0098385 A1Heritage Research Group
- Extruded pvc glass fiber reinforced railroad tie with enhanced thermal and mechanical stability29 Jan 2026US 2026/0028781 A1
- Wood coating and method4 Sep 2025US 2025/0277130 A1Tough By Nature, LLC
Most cited
By later US patents
- Synthetic railroad crosstie23US 4,083,491 AThe Dow Chemical Company · 1978
- Railroad tie19US 3,943,818 A1976
- Composite railroad ties with optional integral conduit16US 6,659,362 B12003
- Structural members fabricated from waste materials and method of making the same9US 7,172,136 B22007
- Engineered railroad ties8US 7,011,253 B2Polywood Inc. · 2006