E21D 1/10
Preparation of the ground
Official title: Preparation of the ground {(for galleries or tunnels E21D9/001; improving or preserving foundation soil or rock E02D3/00)}
E21D1/10 (Preparation of the ground) appears on 10 US grants and 6 published applications in this corpus.
Search patents in E21D- Granted patents
- 10
- Published applications
- 6
- Assignees
- 15
- Inventors
- 37
- Latest grant
- 30 Aug 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 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 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 2 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Anti-seismic support method for mine shaft30 Aug 2022US 11,428,101 B2China Coal Research Institute
- Artificial ground freezing method and artificial ground freezing system5 Mar 2019US 10,221,537 B2Chemical Grouting Co., Ltd.
- Method and apparatus for artificial ground freezing28 Sep 2004US 6,796,139 B2Layne Christensen Company
- Method for placement of a permeable remediation zone in situ24 Mar 1998US 5,730,550 ABoard of Trustees operating Michigan State University
- Non-entry method of underground excavation in weak or water bearing grounds10 Jan 1995US 5,380,127 ACigar Lake Mining Corporation
- Anti-seismic support method for mine shaft20 Jan 2022US 2022/0018250 A1China Coal Research Institute
- Underground vertical shafts and nuclear reactors using the same2 Jul 2020US 2020/0208517 A1GE-Hitachi Nuclear Energy Americas LLC
- Underground shaft development method19 Mar 2020US 2020/0088030 A1Orica International Pte Ltd
- Method for reducing noise emissions on ground freezing construction sites10 Oct 2019US 2019/0309495 A1Linde Aktiengesellschaft
- Artificial ground freezing method and artificial ground freezing system7 Dec 2017US 2017/0350087 A1Chemical Grouting Co., Ltd.
Most cited
By later US patents
- Method for excavating a large diameter shaft into the earth and at least partially through an oil-bearing formation210US 4,597,444 AAtlantic Richfield Company · 1986
- Method for placement of a permeable remediation zone in situ61US 5,730,550 ABoard of Trustees operating Michigan State University · 1998
- Ground freezing method54US 3,943,722 AUnion Carbide Canada Limited · 1976
- Process for reinforcing geological formations48US 4,113,014 ABayer Aktiengesellschaft · 1978
- Method and apparatus for artificial ground freezing37US 6,796,139 B2Layne Christensen Company · 2004