E21D 23/066
Pivoted cantilever extensions therefor
Official title: {Pivoted cantilever extensions therefor}
E21D23/066 (Pivoted cantilever extensions therefor) appears on 20 US grants and 6 published applications in this corpus.
Search patents in E21D- Granted patents
- 20
- Published applications
- 6
- Assignees
- 12
- Inventors
- 34
- Latest grant
- 19 Feb 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 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 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 2 |
| 2018 | 0 | 0 |
| 2019 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Longwall optimization control19 Feb 2019US 10,208,592 B2Joy Global Underground Mining LLC
- Roof support monitoring for longwall system22 Jan 2019US 10,184,338 B2Joy Global Underground Mining LLC
- Roof support monitoring for longwall system22 Aug 2017US 9,739,148 B2Joy MM Delaware, Inc.
- Coal caving cycle30 Jun 2015US 9,068,452 B2Yancoal Technology Development PTY Ltd
- Mining system with drilling, loading, conveyor, and support1 Feb 2005US 6,848,748 B2DBT GmbH
- Roof support monitoring for longwall system23 Nov 2017US 2017/0335688 A1Joy MM Delaware, Inc.
- Longwall optiminzation control8 Jun 2017US 2017/0159431 A1Joy MM Delaware, Inc.
- Roof support monitoring for longwall system3 Mar 2016US 2016/0061036 A1Joy MM Delaware, Inc.
- Coal caving cycle25 Jul 2013US 2013/0187436 A1Yancoal Technology Development PTY Ltd
- Extraction machine for underground ore extraction operations and a method of extracting output products in underground ore extraction operations7 Aug 2003US 2003/0146655 A1DBT GmbH
Most cited
By later US patents
- Shield structure10US 4,020,640 AVereinigte Osterreichische Eisen- und Stahlwerke-Alpine Montan Aktiengesellschaft · 1977
- Mine working apparatus7US 4,269,546 AHuwood Limited · 1981
- Multi-part roof-contacting structures of mine roof supports7US 4,755,084 AGewerkschaft Eisenhutte Westfalia · 1988
- Shield-carrying roof support unit6US 4,197,035 AVereinigte Osterreichische Eisen- und Stahlwerke-Alpine Montan Aktiengesellschaft · 1980
- Hydraulic roof-support frame4US 4,266,892 AHermann Hemscheidt Maschinenfabrik GmbH & Co. · 1981