E21D 11/34
Joints between vertical props and horizontal top bars
Official title: Joints between vertical props and horizontal top bars (end caps forming part of the props E21D15/54 {; retaining plates on caps for engaging the tops of pit-props E21D17/10})
E21D11/34 (Joints between vertical props and horizontal top bars) appears on 5 US grants and 3 published applications in this corpus.
Search patents in E21D- Granted patents
- 5
- Published applications
- 3
- Assignees
- 5
- Inventors
- 8
- Latest grant
- 12 Jun 2012
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 1 | 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 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Mine roof and rib support with reinforced channel12 Jun 2012US 8,197,160 B2FCI Holdings Delaware, Inc.
- Mine roof and rib support device14 Sep 2010US 7,794,181 B2FCI Holdings Delaware, Inc.
- Cap shoe22 Sep 1992US 5,149,044 ABochumer Eisenhutte Heintzmann GmbH & Co. KG
- Non-crosslinked polyether-ketones which can be processed by a thermoplastic method, and their preparation24 Feb 1987US 4,645,819 ABASF SE
- Beam coupling20 May 1986US 4,589,795 ACaledonian Mining Co. Ltd.
Most cited
By later US patents
- Non-crosslinked polyether-ketones which can be processed by a thermoplastic method, and their preparation7US 4,645,819 ABASF SE · 1987
- Mine roof and rib support device3US 7,794,181 B2FCI Holdings Delaware, Inc. · 2010
- Mine roof and rib support with reinforced channel3US 8,197,160 B2FCI Holdings Delaware, Inc. · 2012
- Beam coupling1US 4,589,795 ACaledonian Mining Co. Ltd. · 1986