E21D 15/30
By means expanded or contracted by pressure applied through the medium of
Official title: by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber {(setting props E21D15/588, E21D15/589)}
E21D15/30 (By means expanded or contracted by pressure applied through the medium of) appears on 4 US grants and 3 published applications in this corpus.
Search patents in E21D- Granted patents
- 4
- Published applications
- 3
- Assignees
- 3
- Inventors
- 5
- Latest grant
- 5 Oct 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 1 | 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 | 0 |
| 2019 | 0 | 2 |
| 2020 | 2 | 1 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Mine roof support, pre-installation assembly for same, and method of installation5 Oct 2021US 11,136,887 B2Burrell Mining Products, Inc.
- Mine roof support, pre-installation assembly for same, and method of installation3 Nov 2020US 10,822,948 B2Burrell Mining Products, Inc.
- Load support drum with resilient core member15 Sep 2020US 10,774,641 B2Micon
- Prestressing of mine props23 Sep 1997US 5,669,739 AHL&H Timber Products (Proprietary) Limited
- Mine roof support, pre-installation assembly for same, and method of installation15 Oct 2020US 2020/0325776 A1Burrell Mining Products, Inc.
- Mine roof support, pre-installation assembly for same, and method of installation4 Jul 2019US 2019/0203597 A1Burrell Mining Products, Inc.
- Load support drum with resilient core member24 Jan 2019US 2019/0024508 A1Micon
Most cited
By later US patents