E21D 15/32
By a deformable collar or clamping means applied symmetrically inside a locking
Official title: by a deformable collar {or clamping means applied symmetrically inside a locking ring}
E21D15/32 (By a deformable collar or clamping means applied symmetrically inside a locking) appears on 9 US grants and 9 published applications in this corpus.
Search patents in E21D- Granted patents
- 9
- Published applications
- 9
- Assignees
- 6
- Inventors
- 14
- Latest grant
- 4 Nov 2008
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 2 | 2 |
| 2007 | 0 | 2 |
| 2008 | 4 | 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 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Yieldable prop having a restraint arrangement4 Nov 2008US 7,445,408 B2Jennmar Corporation
- Yieldable prop having a yield section24 Jun 2008US 7,390,147 B2Jennmar Corporation
- Yieldable prop22 Apr 2008US 7,360,971 B2Jennmar Corporation
- Yieldable prop26 Feb 2008US 7,334,968 B2Jennmar Corporation
- Yieldable prop having a yield section14 Nov 2006US 7,134,810 B2Jennmar Corporation
- Improved prop assemblies25 Jul 2024US 2024/0247506 A1R.J. Goldspink Pty Limited
- Yieldable Prop Having A Yield Section15 Mar 2007US 2007/0059109 A1Jennmar Corporation
- Yieldable prop having a yield section8 Feb 2007US 2007/0031197 A1Jennmar Corporation
- Support column assembly14 Dec 2006US 2006/0278476 A1
- Support column collet assembly21 Sep 2006US 2006/0207210 A1
Most cited
By later US patents
- Support prop15US 5,720,581 ADorbyl Limited · 1998
- Resilienty compressible support column for use in a mine12US 5,564,867 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1996
- Mine prop7US 5,314,161 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1994
- Yieldable prop having a yield section4US 7,134,810 B2Jennmar Corporation · 2006
- Yieldable prop4US 7,334,968 B2Jennmar Corporation · 2008