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E21D 1/12

By freezing

Official title: by freezing {(freezing of foundation soil E02D3/115)}

E21D1/12 (By freezing) appears on 7 US grants and 3 published applications in this corpus.

Search patents in E21D

Granted patents: 7
Published applications: 3
Assignees: 10
Inventors: 19
Latest grant: 5 Mar 2019

Filings by year

E21D 1/12: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	1	0
1977	0	0
1978	0	0
1979	0	0
1980	0	0
1981	0	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

By publication year. Applications have been published since 2001.

Subgroups

Granted patents

E21D 1/14Freezing apparatus3

Recent patents

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
Method for excavating a large diameter shaft into the earth and at least partially through an oil-bearing formation1 Jul 1986US 4,597,444 AAtlantic Richfield Company

Most cited

By later US patents