B61D 7/24
Opening or closing means
B61D7/24 (Opening or closing means) appears on 256 US grants and 150 published applications in this corpus.
Search patents in B61D- Granted patents
- 256
- Published applications
- 150
- Assignees
- 88
- Inventors
- 291
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 13 | 0 |
| 1981 | 11 | 0 |
| 1982 | 10 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 7 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 2 |
| 2002 | 3 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 4 |
| 2005 | 3 | 6 |
| 2006 | 6 | 12 |
| 2007 | 4 | 9 |
| 2008 | 5 | 3 |
| 2009 | 4 | 1 |
| 2010 | 6 | 12 |
| 2011 | 8 | 8 |
| 2012 | 8 | 6 |
| 2013 | 8 | 8 |
| 2014 | 7 | 9 |
| 2015 | 7 | 7 |
| 2016 | 6 | 6 |
| 2017 | 5 | 4 |
| 2018 | 6 | 11 |
| 2019 | 9 | 8 |
| 2020 | 10 | 10 |
| 2021 | 4 | 5 |
| 2022 | 2 | 6 |
| 2023 | 8 | 4 |
| 2024 | 2 | 3 |
| 2025 | 5 | 1 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- System and apparatus for providing supplemental securement of doors of bottom dump material transport containers3 Feb 2026US 12,539,891 B1
- Hopper car outlet gate mechanical flap to prevent pellet loss4 Nov 2025US 12,459,547 B2Chevron Phillips Chemical Company LP
- Method and cast components for cold formed center sill rail car modification programs and railcars formed thereby4 Nov 2025US 12,459,549 B2Jac Operations, Inc.
- Devices and systems for articulating an outlet gate door24 Sep 2026US 2026/0285377 A1Transportation IP Holdings, LLC
- Cast components for cold formed center sill rail car modification programs26 Feb 2026US 2026/0054753 A1
- Hopper car outlet gate mechanical flap to prevent pellet loss15 Jan 2026US 2026/0015017 A1Chevron Phillips Chemical Company LP
- Improved Automatic Hatch System for Trough Loaded Hopper Railcars9 Oct 2025US 2025/0313240 A1
- Method of repurposing small cube covered hopper railcars and modified railcars formed thereby2 May 2024US 2024/0140497 A1
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
- Manual railroad hopper car door actuating mechanism97US 6,955,127 B22005
- Railcar unloading system93US 8,379,927 B2Concept Systems Limited · 2013
- Railcar with discharge control system90US 7,051,661 B2TRN Business Trust · 2006