B61D 7/22
Sealing means thereof
B61D7/22 (Sealing means thereof) appears on 49 US grants and 27 published applications in this corpus.
Search patents in B61D- Granted patents
- 49
- Published applications
- 27
- Assignees
- 29
- Inventors
- 90
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 2 | 2 |
| 2012 | 1 | 2 |
| 2013 | 0 | 1 |
| 2014 | 2 | 4 |
| 2015 | 3 | 3 |
| 2016 | 1 | 1 |
| 2017 | 1 | 2 |
| 2018 | 4 | 0 |
| 2019 | 2 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 1 |
| 2022 | 0 | 3 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
| 2025 | 2 | 0 |
| 2026 | 1 | 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
- Hopper car discharge gate seal assembly18 Nov 2025US 12,472,994 B2Trinity Rail Group, LLC
- Hopper car outlet gate mechanical flap to prevent pellet loss4 Nov 2025US 12,459,547 B2Chevron Phillips Chemical Company LP
- Longitudinal door operating mechanism1 Oct 2024US 12,103,571 B2Railcar Innovations, LLC
- Railroad hopper car with flow through structure4 Jul 2023US 11,691,652 B2National Steel Car Limited
- Hopper Car Discharge Gate Seal Assembly5 Mar 2026US 2026/0062036 A1Trinity Rail Group, LLC
- Hopper car outlet gate mechanical flap to prevent pellet loss15 Jan 2026US 2026/0015017 A1Chevron Phillips Chemical Company LP
- Railroad hopper car with flow through structure14 Dec 2023US 2023/0399033 A1National Steel Car Limited
- Hopper car discharge gate seal assembly24 Nov 2022US 2022/0371629 A1Trinity Rail Group, LLC
- Longitudinal door operating mechanism17 Nov 2022US 2022/0363294 A1Railcar Innovations, LLC
Most cited
By later US patents
- Railway hopper car gate valve and operating assembly97US 5,613,446 ATrinity Industries, Inc. · 1997
- Sealing hopper closure assembly85US 3,997,089 AFlorig Equipment Company, Inc. · 1976
- Railway hopper car discharge gate79US 7,367,271 B2Aero Transportation Products, Inc. · 2008
- Hopper discharge unit with sliding gate28US 4,342,267 AEvans Products Company · 1982
- Railroad hopper car with self-contained discharge system25US 4,617,868 AMiner Enterprises, Inc. · 1986