E21D 23/0091
At the junction with the working face
Official title: {at the junction with the working face}
E21D23/0091 (At the junction with the working face) appears on 13 US grants and 7 published applications in this corpus.
Search patents in E21D- Granted patents
- 13
- Published applications
- 7
- Assignees
- 7
- Inventors
- 27
- Latest grant
- 12 Jan 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 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 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 3 |
| 2015 | 3 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Automated support of a gate entry for underground full extraction mining12 Jan 2021US 10,890,068 B2
- Mining systems11 Apr 2017US 9,617,852 B2Seneca Industries Inc.
- Mining systems21 Apr 2015US 9,010,870 B2Seneca Industries Inc.
- Mining methods and equipment24 Mar 2015US 8,985,699 B2Seneca Industries Inc.
- Mining systems with guidance systems24 Mar 2015US 8,985,700 B2Seneca Industries Inc.
- Automated support of a gate entry for underground full extraction mining18 Jun 2020US 2020/0190982 A1
- Mining systems21 Sep 2017US 2017/0268335 A1Seneca Industries Inc.
- Mining systems6 Aug 2015US 2015/0218943 A1Seneca Industries Inc.
- Mining methods and equipment18 Sep 2014US 2014/0265519 A1Seneca Industries Inc.
- Mining methods and equipment18 Sep 2014US 2014/0265522 A1Seneca Industries Inc.
Most cited
By later US patents
- Self-advancing mine roof supports5US 4,505,517 ADobson Park Industries Limited · 1985
- Walking mine support3US 4,183,700 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1980
- Supporting apparatus for the protection of mine gate crossings3US 4,416,566 ATatabanyai Szenbanyak · 1983
- Roof prop apparatus and method for longwall mining2US 4,094,154 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1978
- Apparatus, system, and method for supporting a gate entry for underground full extraction mining2US 7,331,735 B22008