E21C 25/68
Machines for making slits combined with equipment for removing
Official title: Machines for making slits combined with equipment for removing, e.g. by loading, material won by other means (slitting machines combined with planing means E21C27/18; removing chippings E21C35/20)
E21C25/68 (Machines for making slits combined with equipment for removing) appears on 29 US grants and 23 published applications in this corpus.
Search patents in E21C- Granted patents
- 29
- Published applications
- 23
- Assignees
- 12
- Inventors
- 49
- Latest grant
- 19 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 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 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 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 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 2 |
| 2015 | 1 | 1 |
| 2016 | 0 | 2 |
| 2017 | 1 | 1 |
| 2018 | 1 | 2 |
| 2019 | 1 | 1 |
| 2020 | 4 | 5 |
| 2021 | 3 | 3 |
| 2022 | 1 | 2 |
| 2023 | 3 | 1 |
| 2024 | 2 | 2 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Systems and methods for automated control of a beam stageloader bootend19 Aug 2025US 12,391,483 B2Joy Global Underground Mining LLC
- Systems and methods for automated control of a beam stageloader bootend19 Aug 2025US 12,391,484 B2Joy Global Underground Mining LLC
- Systems and methods for automated control of a beam stageloader bootend25 Jun 2024US 12,017,858 B2Joy Global Underground Mining LLC
- Systems and methods for automated control of a beam stageloader bootend25 Jun 2024US 12,017,859 B2Joy Global Underground Mining LLC
- Method for rotary clearing in stripping tooth holder of mining machine and rotary clearing device in stripping tooth holder19 Dec 2023US 11,846,188 B2
- Systems and methods for automated control of a beam stageloader bootend19 Sep 2024US 2024/0308774 A1Joy Global Underground Mining LLC
- Systems and methods for automated control of a beam stageloader bootend19 Sep 2024US 2024/0308775 A1Joy Global Underground Mining LLC
- Six-Arm Tunneling and Anchoring Machine30 Nov 2023US 2023/0383651 A1Lang Fang Jing Long Grand Industrial Machinery Co., Ltd.
- Method for Rotary Clearing in Stripping Tooth Holder of Mining Machine and Rotary Clearing Device in Stripping Tooth Holder24 Nov 2022US 2022/0372875 A1
- Machine supporting rock cutting device17 Feb 2022US 2022/0049605 A1Joy Global Underground Mining LLC
Most cited
By later US patents
- Milling machine, in particular surface miner, and method for mining milled material of an open cast surface26US 8,528,988 B2Wirtgen GmbH · 2013
- Highwall mining system with driven conveyor units20US 5,609,397 AThe Broken Hill Proprietary Company Limited · 1997
- Conveyor system for a continuous mining machine17US 4,277,105 A1981
- Milling machine, in particular surface miner, and method for mining milled material of an open cast surface15US 9,126,776 B2Wirtgen GmbH · 2015
- Wire communications channel for a pair of unitized augers7US 4,021,076 AConsolidation Coal Company · 1977