E21C 29/00
Propulsion of machines for slitting or completely freeing the mineral from the
Official title: Propulsion of machines for slitting or completely freeing the mineral from the seam
E21C29/00 (Propulsion of machines for slitting or completely freeing the mineral from the) appears on 233 US grants and 112 published applications in this corpus.
Search patents in E21C- Granted patents
- 233
- Published applications
- 112
- Assignees
- 105
- Inventors
- 355
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 10 | 0 |
| 1978 | 17 | 0 |
| 1979 | 10 | 0 |
| 1980 | 13 | 0 |
| 1981 | 15 | 0 |
| 1982 | 10 | 0 |
| 1983 | 9 | 0 |
| 1984 | 8 | 0 |
| 1985 | 7 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 4 |
| 2005 | 1 | 3 |
| 2006 | 1 | 3 |
| 2007 | 4 | 2 |
| 2008 | 1 | 2 |
| 2009 | 2 | 0 |
| 2010 | 1 | 3 |
| 2011 | 1 | 7 |
| 2012 | 3 | 9 |
| 2013 | 5 | 3 |
| 2014 | 3 | 4 |
| 2015 | 6 | 6 |
| 2016 | 4 | 6 |
| 2017 | 5 | 16 |
| 2018 | 1 | 9 |
| 2019 | 15 | 2 |
| 2020 | 10 | 9 |
| 2021 | 5 | 5 |
| 2022 | 6 | 5 |
| 2023 | 4 | 4 |
| 2024 | 3 | 6 |
| 2025 | 5 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Guide shoe for mining machine23 Jun 2026US 12,662,939 B2Joy Global Underground Mining LLC
- Rackbar rotation limit24 Mar 2026US 12,584,409 B2Joy Global Underground Mining LLC
- Method and system for mining23 Sep 2025US 12,421,802 B2Novamera Inc.
- Guide shoe for mining machine5 Aug 2025US 12,378,883 B2Joy Global Underground Mining LLC
- Mine material processing apparatus including gas spring wheel assemblies and related methods3 Jun 2025US 12,319,090 B2Gacw Incorporated
- Guide shoe for mining machine2 Apr 2026US 2026/0092521 A1Joy Global Underground Mining LLC
- Roadheader and cutter head therefor9 Oct 2025US 2025/0314172 A1Sandvik Mining and Construction Oy
- Systems And Methods For Non-Contact Boring27 Feb 2025US 2025/0067176 A1Phoenix Boring, Inc.
- Method and system for mining10 Oct 2024US 2024/0337161 A1Novamera Inc.
- A cutting head assembly19 Sep 2024US 2024/0309761 A1Optima Mining Systems Pty Ltd
Most cited
By later US patents
- Method and a device for tensioning endless drive belts45US 5,641,058 AWestfalia Becorit Industrietechnik GmbH · 1997
- Rack device for a mining machine37US 4,082,361 AGebr. Eickhoff, Maschinenfabrik und Eisengiesserei m.b.H. · 1978
- Support for movable segments in a rack for a drum cutter mining machine32US 4,155,600 AGebr. Eickhoff, Maschinenfabrik und Eisengiesserei m.b.H. · 1979
- Mining machine having rectangular thrust transmitting conveyor column27US 4,014,574 ABrowning & Bushman · 1977
- Chain drive or return arrangement and chain assembly and sprocket employed therein22US 8,038,558 B2DBT GmbH · 2011