E21C 25/20
Machines slitting solely by one or more reciprocating sawing implements or reciprocating
Official title: Machines slitting solely by one or more reciprocating sawing implements or reciprocating cutter chains; Shaker conveyors with cutting means
E21C25/20 (Machines slitting solely by one or more reciprocating sawing implements or reciprocating) appears on 7 US grants and 4 published applications in this corpus.
Search patents in E21C- Granted patents
- 7
- Published applications
- 4
- Assignees
- 4
- Inventors
- 11
- Latest grant
- 1 Jun 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 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 | 0 | 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 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Material-removal systems, cutting tools therefor, and related methods1 Jun 2021US 11,021,953 B1Apergy Bmcs Acquisition Corporation
- Vibrating type hard rock cutting mechanism with function of directional high-speed abrasive jet advanced slitting19 Jan 2021US 10,895,153 B2China University of Mining and Technology
- Material-removal systems, cutting tools therefor, and related methods10 Sep 2019US 10,408,057 B1Apergy Bmcs Acquisition Corporation
- Method and apparatus for creating a planar cavern11 Feb 2014US 8,646,846 B2
- Forming oriented fissures in a subterranean target zone1 Oct 2013US 8,544,544 B2Jimni Development LLC
- Vibrating type hard rock cutting mechanism with function of directional high-speed abrasive jet advanced slitting16 Jul 2020US 2020/0223098 A1China University of Mining and Technology
- Forming oriented fissures in a subterranean target zone6 Dec 2012US 2012/0305318 A1Jimni Development LLC
- Method and apparatus for creating a planar cavern23 Feb 2012US 2012/0043800 A1
- Drilling and opening reservoirs using an oriented fissure1 Apr 2010US 2010/0078220 A1Jimni Development LLC
Most cited
By later US patents
- Oscillating disk thin seam mining machine with steering22US 4,045,088 A1977
- Material-removal systems, cutting tools therefor, and related methods8US 10,408,057 B1Apergy Bmcs Acquisition Corporation · 2019
- Drilling and opening reservoirs using an oriented fissure1US 8,261,820 B2Jimni Development LLC · 2012