E21D 15/502
Prop bodies characterised by their shape
Official title: Prop bodies characterised by their shape, e.g. of specified cross-section
E21D15/502 (Prop bodies characterised by their shape) appears on 8 US grants and 7 published applications in this corpus.
Search patents in E21D- Granted patents
- 8
- Published applications
- 7
- Assignees
- 7
- Inventors
- 19
- Latest grant
- 8 Feb 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 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 | 1 |
| 2014 | 1 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 2 |
| 2021 | 2 | 1 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Adjustable lattice girder8 Feb 2022US 11,242,750 B2FCI Holdings Delaware, Inc.
- Mine roof support, pre-installation assembly for same, and method of installation5 Oct 2021US 11,136,887 B2Burrell Mining Products, Inc.
- Underground support28 Sep 2021US 11,131,189 B2FCI Holdings Delaware, Inc.
- Apparatus and method for pre-loading mechanical constant-resistance single prop20 Aug 2019US 10,385,692 B2China University of Mining and Technology
- Mine roof support5 Sep 2017US 9,752,435 B2Setevox (Pty) Ltd
- Adjustable Lattice Girder27 May 2021US 2021/0156251 A1FCI Holdings Delaware, Inc.
- Mine roof support, pre-installation assembly for same, and method of installation15 Oct 2020US 2020/0325776 A1Burrell Mining Products, Inc.
- Underground Support4 Jun 2020US 2020/0173280 A1FCI Holdings Delaware, Inc.
- Apparatus and method for pre-loading mechanical constant-resistance single prop21 Mar 2019US 2019/0085690 A1China University of Mining and Technology
- Mine roof support23 Jul 2015US 2015/0204192 A1Setevox (Pty) Ltd
Most cited
By later US patents