E21C 47/04
Conveyor bridges used in co-operation with the winning apparatus
E21C47/04 (Conveyor bridges used in co-operation with the winning apparatus) appears on 15 US grants and 10 published applications in this corpus.
Search patents in E21C- Granted patents
- 15
- Published applications
- 10
- Assignees
- 13
- Inventors
- 27
- Latest grant
- 23 Mar 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 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 | 1 | 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 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 2 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 2 |
| 2019 | 1 | 0 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Feeder23 Mar 2021US 10,954,786 B2MMD Design & Consultancy Limited
- Apparatus and methods for cemented multi-zone completions17 Mar 2020US 10,590,767 B2Weatherford Technology Holdings, LLC
- Excavation utilizing dual hopper system19 Mar 2019US 10,233,616 B2Caterpillar Inc.
- Apparatus and methods for cemented multi-zone completions27 Mar 2018US 9,926,783 B2Weatherford Technology Holdings, LLC
- Mining methods and systems using mobile conveyors29 Sep 2015US 9,145,261 B2Thyssenkrupp Industrial Solutions (USA), Inc.
- Feeder2 May 2024US 2024/0140728 A1Mmd Group Limited
- Feeder2 May 2024US 2024/0140737 A1Mmd Group Limited
- Feeder4 Jun 2020US 2020/0173279 A1MMD Design & Consultancy Limited
- Excavation Utilizing Dual Hopper System28 Jun 2018US 2018/0179737 A1Caterpillar Inc.
- Apparatus and methods for cemented multi-zone completions21 Jun 2018US 2018/0171797 A1Weatherford Technology Holdings, LLC
Most cited
By later US patents
- Cross-pit conveyor16US 4,489,818 AMannesmann Aktiengesellschaft · 1984
- Mobile connecting belt bridge for open pit mining12US 5,404,988 AKrupp Fordertechnik GmbH · 1995
- Surface mining method9US 4,290,651 ADresser Industries, Inc. · 1981
- Apparatus for progessively removing layers of overburden from an inclined side of a cut5US 4,183,586 AThe Research Council of Alberta · 1980
- Cross-pit conveyor4US 4,446,958 ADresser Industries, Inc. · 1984