E21F 5/10
Devices for rock dusting
E21F5/10 (Devices for rock dusting) appears on 18 US grants and 13 published applications in this corpus.
Search patents in E21F- Granted patents
- 18
- Published applications
- 13
- Assignees
- 12
- Inventors
- 29
- Latest grant
- 17 Nov 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 2 | 4 |
| 2014 | 1 | 0 |
| 2015 | 3 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 2 |
| 2020 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Mine safety system and method17 Nov 2020US 10,837,281 B2Real Innovations Australia Pty Ltd
- Apparatus for dispersing explosion prevention mixture28 May 2019US 10,300,827 B2
- Method and apparatus for applying rock dust to a mine wall11 Sep 2018US 10,071,269 B2Rusmar Incorporated
- Method and apparatus for applying rock dust to a mine wall5 Jan 2016US 9,228,435 B2Rusmar Incorporated
- Utility mine scoop and mine duster20 Oct 2015US 9,163,503 B1
- Apparatus for mixing and applying particulate matter and foam17 Dec 2020US 2020/0391062 A1Rusmar Incorporated
- Apparatus for dispersing explosion prevention mixture17 Oct 2019US 2019/0316468 A1Strata Equipment, LLC
- Mine safety system and method23 May 2019US 2019/0153864 A1Real Innovations Australia Pty Ltd
- Apparatus for dispersing explosion prevention mixture29 Sep 2016US 2016/0281504 A1A. L. Lee Corporation
- Method and apparatus for applying rock dust to a mine wall30 Apr 2015US 2015/0114671 A1Rusmar Incorporated
Most cited
By later US patents