E21C 35/14
Equipment for pressing the conveyor towards the working face
E21C35/14 (Equipment for pressing the conveyor towards the working face) appears on 16 US grants and 2 published applications in this corpus.
Search patents in E21C- Granted patents
- 16
- Published applications
- 2
- Assignees
- 12
- Inventors
- 32
- Latest grant
- 19 Feb 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 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 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Longwall optimization control19 Feb 2019US 10,208,592 B2Joy Global Underground Mining LLC
- Method for automatically producing a defined face opening in plow operations in coal mining19 Feb 2013US 8,376,467 B2RAG Aktiengesellschaft
- Methods of controlling the operation of mineral mining installations24 Nov 1987US 4,708,394 AGewerkschaft Eisenhutte Westfalia
- Longwall mineral mining installation21 Jun 1983US 4,389,072 AGewerkschaft Eisenhutte Westfalia
- Self-advancing mineral mining installation including tilting machine support8 Feb 1983US 4,372,618 AUnion Special Corporation
Most cited
By later US patents
- Method for automatically producing a defined face opening in plow operations in coal mining13US 8,376,467 B2RAG Aktiengesellschaft · 2013
- Feed system of a coal getting combine10US 4,025,120 A1977
- Longwall mineral mining installation9US 4,389,072 AGewerkschaft Eisenhutte Westfalia · 1983
- Self-advancing mineral mining installation including tilting machine support6US 4,372,618 AUnion Special Corporation · 1983
- Hydraulic control systems for use with mining apparatus5US 4,046,060 AGewerkschaft Eisenhutte Westfalia · 1977