E21C 25/02
Machines slitting solely by one or more percussive tools moved through the
Official title: Machines slitting solely by one or more percussive tools moved through the seam
E21C25/02 (Machines slitting solely by one or more percussive tools moved through the) appears on 6 US grants and 9 published applications in this corpus.
Search patents in E21C- Granted patents
- 6
- Published applications
- 9
- Assignees
- 3
- Inventors
- 10
- Latest grant
- 19 Dec 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 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 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 2 |
| 2017 | 0 | 2 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 2 |
| 2022 | 0 | 1 |
| 2023 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- 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
- Mining or construction vehicle21 Feb 2023US 11,585,154 B2Epiroc Rock Drills Aktiebolag
- Non-concentric protruding shaft fixed bearing reciprocating impact part for implementing reciprocating impact part non-concentric protruding shaft fixed bearing method3 Sep 2019US 10,400,597 B2
- Hydraulic resonant breaking hammer8 Apr 2014US 8,690,261 B2
- Method for removing hard rock and concrete by the combination use of impact hammers and small charge blasting14 Nov 2000US 6,145,933 ARockTek Limited
- Method for Rotary Clearing in Stripping Tooth Holder of Mining Machine and Rotary Clearing Device in Stripping Tooth Holder24 Nov 2022US 2022/0372875 A1
- Reciprocating impact bevel tooth discharging shovel of reciprocating impact mining machine13 May 2021US 2021/0140316 A1
- Mining or construction vehicle28 Jan 2021US 2021/0025237 A1Epiroc Rock Drills Aktiebolag
- Reciprocating impact slack-drop/rotating/raking multifunctional power shaft12 Jan 2017US 2017/0009579 A1
- Non-concentric protruding shaft fixed bearing reciprocating impact part for implementing reciprocating impact part non-concentric protruding shaft fixed bearing method5 Jan 2017US 2017/0002656 A1
Most cited
By later US patents
- Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting15US 5,803,550 ABolinas Technologies, Inc. · 1998
- Method for removing hard rock and concrete by the combination use of impact hammers and small charge blasting7US 6,145,933 ARockTek Limited · 2000
- Hydraulic resonant breaking hammer1US 8,690,261 B22014