E21F 5/00
Means or methods for preventing, binding, depositing, or removing dust
Official title: Means or methods for preventing, binding, depositing, or removing dust {(in combination with mining machines E21C35/22)}; Preventing explosions or fires (dams E21F17/103; applying liquids or other fluent materials to surfaces in general B05)
E21F5/00 (Means or methods for preventing, binding, depositing, or removing dust) appears on 159 US grants and 150 published applications in this corpus.
Search patents in E21F- Granted patents
- 159
- Published applications
- 150
- Assignees
- 126
- Inventors
- 455
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 8 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 2 |
| 2004 | 2 | 4 |
| 2005 | 1 | 4 |
| 2006 | 1 | 0 |
| 2007 | 1 | 4 |
| 2008 | 0 | 3 |
| 2009 | 0 | 0 |
| 2010 | 2 | 4 |
| 2011 | 1 | 3 |
| 2012 | 3 | 5 |
| 2013 | 6 | 11 |
| 2014 | 4 | 9 |
| 2015 | 5 | 11 |
| 2016 | 9 | 14 |
| 2017 | 9 | 13 |
| 2018 | 6 | 6 |
| 2019 | 8 | 11 |
| 2020 | 9 | 13 |
| 2021 | 7 | 6 |
| 2022 | 6 | 7 |
| 2023 | 6 | 1 |
| 2024 | 4 | 9 |
| 2025 | 3 | 6 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21F 5/02Means or methods for preventing, binding, depositing, or removing dust: by wetting64
- E21F 5/20Drawing-off or depositing dust32
- E21F 5/08Rock dusting of mines30
- E21F 5/18Impregnating walls, or the like, with liquids for binding dust10
- E21F 5/14Fluid barriers or rock dusters made to work by, or at the7
- E21F 5/16Layers of hygroscopic or other salts deposited on floors, walls, or the4
Recent patents
- Method for coal seam gas seepage displacement, seepage water locking and dust reduction22 Sep 2026US 12,742,389 B2Hunan University of Science and Technology
- Smart dust suppression system that sprays atomized water through a fan24 Mar 2026US 12,582,934 B2
- Water dispensing management for autonomous machines17 Jun 2025US 12,331,644 B2Caterpillar Inc.
- Fire-prevention and extinguishing material for plugging air leakage in underground barrier pillar of coal mine and use method thereof10 Jun 2025US 12,326,087 B1China University of Mining and Technology
- Efficient biodegradable dust suppressant for open-pit mine and preparation method therefor14 Jan 2025US 12,195,663 B2Shandong University of Science and Technology
- Method for coal seam gas seepage displacement, seepage water locking and dust reduction23 Apr 2026US 2026/0110250 A1Hunan University of Science and Technology
- Dust detection and mitigation on worksites16 Apr 2026US 2026/0103983 A1Caterpillar Inc.
- Intelligent automatic coal powder receiving device and method based on prevention and control of rock bursts in coal mines2 Apr 2026US 2026/0092527 A1Shandong University of Science and Technology
- Immobilized mining microbial accelerator based on biosurfactant bacteria and preparation method thereof23 Oct 2025US 2025/0327019 A1Shandong University of Science and Technology
- Management system of workplace and method for managing workplace31 Jul 2025US 2025/0244774 A1Komatsu Ltd.
Most cited
By later US patents
- Method of sealing interior mine surface with a fire retardant hydrophilic polyurethane foam and resulting product128US 4,237,182 AW. R. Grace & Co. · 1980
- Dust control115US 4,417,992 ANalco Chemical Company · 1983
- Filter element support member51US 4,171,963 ADonaldson Company, Inc. · 1979
- Local dust extraction system for an excavation machine51US 9,267,266 B2Vermeer Manufacturing Company · 2016
- Apparatus and method for dust control by condensation enlargement48US 4,497,641 AColorado School of Mines · 1985