E21F 5/14
Fluid barriers or rock dusters made to work by, or at the
Official title: Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions
E21F5/14 (Fluid barriers or rock dusters made to work by, or at the) appears on 7 US grants and 2 published applications in this corpus.
Search patents in E21F- Granted patents
- 7
- Published applications
- 2
- Assignees
- 5
- Inventors
- 15
- Latest grant
- 7 Apr 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Combined automatic anti-explosion method for gas drainage pipeline7 Apr 2020US 10,612,379 B2China University of Mining and Technology
- Explosion protection system9 Apr 2019US 10,252,092 B2Lepl G. Tsulukidze Mining Institute
- Explosion suppression system9 Jun 1992US 5,119,877 AThe United States of America as represented by the Secretary of the Interior
- Passive explosion barrier for mines18 Aug 1981US 4,284,144 AThe United States of America as represented by the Secretary of the Interior
- Trigger device for explosion barrier6 Nov 1979US 4,173,140 AThe United States of America as represented by the Secretary of the Interior
Most cited
By later US patents
- Explosion suppression system6US 5,119,877 AThe United States of America as represented by the Secretary of the Interior · 1992
- Trigger device for explosion barrier5US 4,173,140 AThe United States of America as represented by the Secretary of the Interior · 1979
- Pressure sensitive explosion barrier2US 3,958,644 AThe United States of America as represented by the Secretary of the Interior · 1976
- Passive explosion barrier2US 3,960,217 AThe United States of America as represented by the Secretary of the Interior · 1976
- Explosion protection system1US 10,252,092 B2Lepl G. Tsulukidze Mining Institute · 2019