E21D 21/0066
Anchoring-bolts formed by a bundle of radially arranged rigid elements
Official title: {Anchoring-bolts formed by a bundle of radially arranged rigid elements}
E21D21/0066 (Anchoring-bolts formed by a bundle of radially arranged rigid elements) appears on 13 US grants and 14 published applications in this corpus.
Search patents in E21D- Granted patents
- 13
- Published applications
- 14
- Assignees
- 8
- Inventors
- 21
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 3 |
| 2009 | 0 | 2 |
| 2010 | 0 | 1 |
| 2011 | 2 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 3 | 2 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Screwing-in system for inserting a threaded rod into soil10 Feb 2026US 12,546,220 B2Spinnanker GmbH
- Groutable rock anchor assembly5 Nov 2019US 10,465,515 B2Ncm Innovations (Pty) Ltd.
- Grout delivery system9 Jul 2019US 10,344,593 B2Ncm Innovations (Pty) Ltd.
- Method and system of coal mine roof stabilization12 Feb 2019US 10,202,848 B2REI, Inc.
- Method and system of coal mine roof stabilization30 Aug 2016US 9,429,017 B2REI, Inc.
- Screwing-in system for inserting a threaded rod into soil11 Jul 2024US 2024/0229646 A9Spinnanker GmbH
- Screwing-in system for inserting a threaded rod into a substrate25 Apr 2024US 2024/0133296 A1Spinnanker GmbH
- Method and system of coal mine roof stabilization23 May 2019US 2019/0153862 A1REI, Inc.
- Groutable rock anchor assembly4 Apr 2019US 2019/0100998 A1Ncm Innovations (Pty) Ltd.
- Grout delivery system11 Oct 2018US 2018/0291737 A1Ncm Innovations (Pty) Ltd.
Most cited
By later US patents
- Reinforcing member29US 6,779,950 B1Quantax PTY LTD · 2004
- Self drilling rock bolt17US 7,896,580 B2Sandvik Intellectual Property AB · 2011
- Packaging arrangements for rock stabilizer sets10US 6,257,802 B1International Rollforms Inc. · 2001
- Hollow bars and method of manufacture9US 5,803,671 A1998
- Rock bolt and method of use5US 6,929,424 B2Romtech Limited · 2005