E21D 21/0073
Anchoring-bolts having an inflatable sleeve
Official title: {Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid}
E21D21/0073 (Anchoring-bolts having an inflatable sleeve) appears on 26 US grants and 29 published applications in this corpus.
Search patents in E21D- Granted patents
- 26
- Published applications
- 29
- Assignees
- 19
- Inventors
- 70
- Latest grant
- 4 Aug 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 2 | 3 |
| 2007 | 1 | 6 |
| 2008 | 3 | 3 |
| 2009 | 0 | 2 |
| 2010 | 1 | 1 |
| 2011 | 5 | 1 |
| 2012 | 1 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 1 |
| 2015 | 2 | 2 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 3 |
| 2019 | 1 | 3 |
| 2020 | 2 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Sock anchor unit4 Aug 2020US 10,731,331 B2
- Rock anchor inflation and draining system2 Jun 2020US 10,669,849 B2Nevada Industrial LLC
- Self-draining rock anchor23 Apr 2019US 10,267,148 B1Nevada Industrial LLC
- Ground reinforcement structure and construction method thereof14 Aug 2018US 10,047,491 B2Kolon Global Corporation
- Expandable bolt with shielded tip23 Jun 2015US 9,062,547 B2FCI Holdings Delaware, Inc.
- Anchor Arrangement17 Oct 2024US 2024/0344457 A1Mohlalefi (Pty) Ltd.
- Sock anchor unit28 Nov 2019US 2019/0360193 A1
- Rock anchor inflation and draining system11 Jul 2019US 2019/0211675 A1Nevada Industrial LLC
- Expandable rock bolt with indicator of clamping30 May 2019US 2019/0162068 A1
- Shear and tensile reinforcement for inflatable bolt21 Jun 2018US 2018/0171800 A1Epiroc Canada Inc.
Most cited
By later US patents
- Method and installation apparatus for rock bolting121US 4,423,986 AAtlas Copco Aktiebolag · 1984
- Rock bolt system and method of rock bolting108US 5,335,736 ACommonwealth Scientific and Industrial Research Organisation · 1994
- Expansion bolt and mine roof reinforcement25US 4,954,017 AThe Curators of the University of Missouri · 1990
- Anchor device with an elastic expansion sleeve17US 7,465,128 B22008
- Earth anchoring expansion body having folded sheet metal casing13US 4,487,528 AAtlas Copco Aktibolag · 1984