E21F 13/002
Crushing devices specifically for conveying in mines
Official title: {Crushing devices specifically for conveying in mines}
E21F13/002 (Crushing devices specifically for conveying in mines) appears on 26 US grants and 16 published applications in this corpus.
Search patents in E21F- Granted patents
- 26
- Published applications
- 16
- Assignees
- 24
- Inventors
- 76
- Latest grant
- 4 Oct 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 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 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 3 |
| 2014 | 0 | 2 |
| 2015 | 4 | 2 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 1 |
| 2020 | 2 | 1 |
| 2021 | 0 | 1 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Automatic coal mining machine and fluidized coal mining method4 Nov 2021US 2021/0340870 A1China University of Mining and Technology, Beijing
- Auxiliary Transportation and Support System Used after Rapid Excavation2 Jul 2020US 2020/0208519 A1Lang Fang Jing Long Grand Industrial Machinery Co., Ltd.
- Feeder breaker with reduced fines generation10 Jan 2019US 2019/0009279 A1Joy Global Underground Mining LLC
- Conveyor system for mining equipment6 Dec 2018US 2018/0347359 A1Joy Global Underground Mining LLC
Most cited
By later US patents
- Apparatus for hydraulically transporting solids33US 3,931,999 AContinental Oil Company · 1976
- Feeder/crusher machine15US 4,418,872 ABaker Mine Services, Inc. · 1983
- Apparatus for the underground operation of a movable mining machine11US 4,758,049 AVoest-Alpine Aktiengesellschaft · 1988
- Conveyor system for mining equipment8US 10,550,694 B2Joy Global Underground Mining LLC · 2020
- Feeder crusher7US 4,073,445 AS & S Corporation · 1978