E21C 35/22
Equipment for preventing the formation of, or for removal of, dust
Official title: Equipment for preventing the formation of, or for removal of, dust (picks with arrangement of fluid-spraying nozzles E21C35/187; {removing dust while drilling E21B21/011})
E21C35/22 (Equipment for preventing the formation of, or for removal of, dust) appears on 166 US grants and 72 published applications in this corpus.
Search patents in E21C- Granted patents
- 166
- Published applications
- 72
- Assignees
- 90
- Inventors
- 277
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 8 | 0 |
| 1985 | 10 | 0 |
| 1986 | 8 | 0 |
| 1987 | 11 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 0 |
| 2002 | 4 | 2 |
| 2003 | 0 | 2 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 1 |
| 2010 | 2 | 3 |
| 2011 | 1 | 1 |
| 2012 | 0 | 4 |
| 2013 | 1 | 2 |
| 2014 | 2 | 6 |
| 2015 | 3 | 5 |
| 2016 | 5 | 7 |
| 2017 | 4 | 5 |
| 2018 | 6 | 1 |
| 2019 | 3 | 3 |
| 2020 | 4 | 8 |
| 2021 | 5 | 4 |
| 2022 | 4 | 4 |
| 2023 | 3 | 0 |
| 2024 | 2 | 3 |
| 2025 | 2 | 3 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cutter head for mining machine12 Aug 2025US 12,385,395 B2Joy Global Underground Mining LLC
- Method and apparatus for removing debris from a drill hole during drilling1 Jul 2025US 12,345,106 B2
- Homogenizer, rock drilling rig and method of sampling12 Nov 2024US 12,139,979 B2Sandvik Mining and Construction Oy
- Gas-liquid spray dust settlement system for fully mechanized mining face16 Jan 2024US 11,873,719 B2Anhui University of Science and Technology
- Method for removing material from a rock wall15 Aug 2023US 11,725,512 B2Joy Global Underground Mining LLC
- Method for monitoring dust collector performance, a dust collecting arrangement of a drilling apparatus and a rock drilling rig23 Apr 2026US 2026/0110226 A1Sandvik Mining and Construction Oy
- Filter system for removing dust particles from underground mining and methods of use thereof29 Jan 2026US 2026/0028909 A1
- Management system of work site and method for managing work site6 Nov 2025US 2025/0339870 A1Komatsu Ltd.
- Management system of workplace and method for managing workplace31 Jul 2025US 2025/0244774 A1Komatsu Ltd.
- Dust mitigation system9 Jan 2025US 2025/0012188 A1Epiroc Drilling Solutions, LLC
Most cited
By later US patents
- Local dust extraction system for an excavation machine51US 9,267,266 B2Vermeer Manufacturing Company · 2016
- Nozzle for supplying a liquid to a rotating tool40US 5,826,478 AAndreas Stihl AG & CO.KG · 1998
- Dust control system and method of operation38US 4,380,353 APeabody Coal Company · 1983
- Blower and dust collecting machine and method of operation28US 4,348,057 AB & J Manufacturing Company · 1982
- Rotary cutter for gouging out ore from mine faces25US 4,647,112 ACharbonnages de France · 1987