E01B 3/28
Made from concrete or from natural or artificial stone
Official title: made from concrete or from natural or artificial stone (manufacture B28)
E01B3/28 (Made from concrete or from natural or artificial stone) appears on 135 US grants and 112 published applications in this corpus.
Search patents in E01B- Granted patents
- 135
- Published applications
- 112
- Assignees
- 114
- Inventors
- 293
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 5 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 4 |
| 2004 | 2 | 4 |
| 2005 | 0 | 5 |
| 2006 | 2 | 1 |
| 2007 | 2 | 1 |
| 2008 | 0 | 6 |
| 2009 | 1 | 5 |
| 2010 | 4 | 6 |
| 2011 | 2 | 3 |
| 2012 | 3 | 7 |
| 2013 | 4 | 3 |
| 2014 | 3 | 3 |
| 2015 | 4 | 4 |
| 2016 | 2 | 8 |
| 2017 | 7 | 5 |
| 2018 | 4 | 8 |
| 2019 | 5 | 5 |
| 2020 | 4 | 2 |
| 2021 | 3 | 7 |
| 2022 | 2 | 7 |
| 2023 | 2 | 3 |
| 2024 | 4 | 7 |
| 2025 | 5 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Nonwoven fabric-integrated sleeper pad using rubber pad embedded with stiffener and methods of manufacturing and constructing the same22 Sep 2026US 12,742,294 B2Korea Railroad Research Institute
- Polymeric composite, product with polymer composite, dry process for preparing polymer composite, process for preparing a sleeper5 May 2026US 12,617,722 B2Sileto Technologies LLC
- Ballastless track section for a rail vehicle21 Oct 2025US 12,448,736 B2Systra
- Railroad sleeper and process for manufacturing a railroad sleeper1 Jul 2025US 12,344,998 B2Braskem S/A
- Turnout arrangement with elastically supported turnout bases18 Mar 2025US 12,252,847 B2PORR Bau GmbH
- Under sleeper pad16 Jul 2026US 2026/0201653 A1Getzner Werkstoffe Holding GmbH
- Direct Fixation Block Assembly15 Jan 2026US 2026/0015802 A1voestalpine Railway Systems Nortrak LLC
- Polymeric Composite, Product with Polymer Composite, Dry Process for Preparing Polymer Composite, Process for Preparing a Sleeper14 Aug 2025US 2025/0257009 A1Sileto Technologies LLC
- Method and system for structural diagnosis of concrete railway sleepers14 Aug 2025US 2025/0258058 A1Sol Solution
- Track17 Jul 2025US 2025/0230611 A1Tdi Greenway Technologies Ltd.
Most cited
By later US patents
- Structural members32US 5,573,348 A1996
- Device for monitoring the condition of the superstructure especially of fixed railroad tracks32US 7,023,539 B2Pfleiderer Infrastrukturtechnik GmbH & Co. KG · 2006
- Composite railway tie and method of manufacture thereof26US 5,609,295 AGreen Track Inc. · 1997
- Synthetic railroad crosstie23US 4,083,491 AThe Dow Chemical Company · 1978
- Railway track hold-down hardware21US 4,179,067 A1979