E21D 1/14
Freezing apparatus
E21D1/14 (Freezing apparatus) appears on 3 US grants and 1 published applications in this corpus.
Search patents in E21D- Granted patents
- 3
- Published applications
- 1
- Assignees
- 5
- Inventors
- 7
- Latest grant
- 10 Jan 1995
Filings by 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 | 0 | 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 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 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 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Non-entry method of underground excavation in weak or water bearing grounds10 Jan 1995US 5,380,127 ACigar Lake Mining Corporation
- Ice-filled structure and tunnelling method for the egress and launching of deep-based missiles14 Feb 1984US 4,431,349 AE. I. Du Pont de Nemours and Company
- Ground freezing method16 Mar 1976US 3,943,722 AUnion Carbide Canada Limited
Most cited
By later US patents
- Ground freezing method54US 3,943,722 AUnion Carbide Canada Limited · 1976
- Ice-filled structure and tunnelling method for the egress and launching of deep-based missiles5US 4,431,349 AE. I. Du Pont de Nemours and Company · 1984
- Non-entry method of underground excavation in weak or water bearing grounds3US 5,380,127 ACigar Lake Mining Corporation · 1995