E01B 3/44
Made from other materials only if the material is essential
Official title: made from other materials only if the material is essential
E01B3/44 (Made from other materials only if the material is essential) appears on 68 US grants and 88 published applications in this corpus.
Search patents in E01B- Granted patents
- 68
- Published applications
- 88
- Assignees
- 52
- Inventors
- 185
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 2 | 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 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 5 |
| 2004 | 4 | 6 |
| 2005 | 1 | 6 |
| 2006 | 1 | 2 |
| 2007 | 2 | 2 |
| 2008 | 1 | 2 |
| 2009 | 0 | 2 |
| 2010 | 2 | 4 |
| 2011 | 2 | 3 |
| 2012 | 1 | 5 |
| 2013 | 5 | 6 |
| 2014 | 3 | 7 |
| 2015 | 3 | 5 |
| 2016 | 4 | 4 |
| 2017 | 5 | 3 |
| 2018 | 1 | 1 |
| 2019 | 2 | 4 |
| 2020 | 5 | 4 |
| 2021 | 0 | 3 |
| 2022 | 3 | 2 |
| 2023 | 2 | 4 |
| 2024 | 2 | 4 |
| 2025 | 2 | 0 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Bridge for a rail vehicle and method for assembling a bridge beam on such a bridge8 Sep 2026US 12,729,487 B2Vossloh Fastening Systems GmbH
- Polymer-based railroad tie having enhanced ballast interaction2 Jun 2026US 12,644,232 B2Rutgers, The State University of New Jersey
- Natural fiber composite construction materials10 Mar 2026US 12,571,217 B2
- Railroad sleeper and process for manufacturing a railroad sleeper1 Jul 2025US 12,344,998 B2Braskem S/A
- 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 interaction24 Sep 2026US 2026/0286620 A1Rutgers, The State University of New Jersey
- Railroad tie elements and related methods2 Apr 2026US 2026/0092413 A1Evertrak LLC
- Extruded pvc glass fiber reinforced railroad tie with enhanced thermal and mechanical stability29 Jan 2026US 2026/0028781 A1
- Curable resin material, resin molded body, and method for producing resin molded body14 Nov 2024US 2024/0376250 A1Sekisui Chemical Co., Ltd.
- Method for producing a shaped body from plastic waste and natural fibres9 May 2024US 2024/0149537 A1
Most cited
By later US patents
- Reinforced molded lignocellulosic crosstie and railway assembly110US 4,150,790 ADant & Russell, Inc. · 1979
- Composite material and synthetic sleeper using the composite material62US 6,605,343 B1Sekisui Chemical Co., Ltd. · 2003
- Composite building materials from recyclable waste42US 5,916,932 ARutgers, The State University · 1999
- Composite building materials from recyclable waste40US 5,789,477 ARutgers, The State University · 1998
- Railroad ties made of recycled tire fragments27US 5,238,734 A1993