E21D 9/0671
With means for consolidating the rock in front of the shield by
Official title: {with means for consolidating the rock in front of the shield by injection of consolidating substances through boreholes}
E21D9/0671 (With means for consolidating the rock in front of the shield by) appears on 5 US grants and 3 published applications in this corpus.
Search patents in E21D- Granted patents
- 5
- Published applications
- 3
- Assignees
- 5
- Inventors
- 14
- Latest grant
- 7 May 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 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 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 2 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Mechanical tunneling apparatus and process for tunnel in quicksand stratum7 May 2024US 11,976,558 B2Shandong University
- Barrier forming apparatus15 Aug 2017US 9,732,612 B2
- Foaming composition26 Nov 2002US 6,485,233 B1MBT Holding AG
- Method of building underground cavern and tunneling machine2 Jun 1992US 5,118,220 AKabushiki Kaisha Kematsu Seisakusho
- Method and device for driving a tunnel30 May 1989US 4,834,580 AAtlas Copco Aktiebolag
Most cited
By later US patents