B61D 7/20
Sliding
Official title: sliding
B61D7/20 (Sliding) appears on 87 US grants and 47 published applications in this corpus.
Search patents in B61D- Granted patents
- 87
- Published applications
- 47
- Assignees
- 40
- Inventors
- 107
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 2 |
| 2002 | 5 | 3 |
| 2003 | 2 | 2 |
| 2004 | 0 | 0 |
| 2005 | 1 | 3 |
| 2006 | 1 | 1 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 3 |
| 2010 | 5 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 2 | 2 |
| 2014 | 2 | 1 |
| 2015 | 0 | 4 |
| 2016 | 3 | 1 |
| 2017 | 0 | 1 |
| 2018 | 2 | 5 |
| 2019 | 3 | 1 |
| 2020 | 1 | 4 |
| 2021 | 3 | 2 |
| 2022 | 1 | 2 |
| 2023 | 3 | 4 |
| 2024 | 2 | 0 |
| 2025 | 1 | 0 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Railroad hopper car with flow through structure25 Aug 2026US 12,715,484 B2National Steel Car Limited
- Opening stop device for railway freight car door outlet gates24 Mar 2026US 12,583,488 B2A. Stucki Company
- Hopper car discharge gate seal assembly18 Nov 2025US 12,472,994 B2Trinity Rail Group, LLC
- Longitudinal door operating mechanism1 Oct 2024US 12,103,571 B2Railcar Innovations, LLC
- Discharge gate arrangements for railroad hopper cars2 Jul 2024US 12,024,211 B2Gunderson LLC
- Devices and systems for articulating an outlet gate door24 Sep 2026US 2026/0285377 A1Transportation IP Holdings, LLC
- Hopper Car Discharge Gate Seal Assembly5 Mar 2026US 2026/0062036 A1Trinity Rail Group, LLC
- Automatic discharge sliding door mechanism for railroad hopper cars21 Dec 2023US 2023/0406365 A1
- Railroad hopper car with flow through structure14 Dec 2023US 2023/0399033 A1National Steel Car Limited
- Discharge gate arrangements for railroad hopper cars5 Oct 2023US 2023/0311955 A1Gunderson LLC
Most cited
By later US patents
- Powered hopper door107US 4,359,176 A1982
- Railway hopper car gate valve and operating assembly97US 5,613,446 ATrinity Industries, Inc. · 1997
- Hopper gate actuating mechanism84US 3,933,100 AACF Industries, Incorporated · 1976
- Gate assembly for a railroad hopper car82US 6,263,803 B1Miner Enterprises, Inc. · 2001
- Gate assembly for a railroad hopper car81US 6,412,422 B2Miner Enterprises, Inc. · 2002