E21B 21/07
For treating dust-laden gaseous fluids
Official title: for treating dust-laden gaseous fluids
E21B21/07 (For treating dust-laden gaseous fluids) appears on 41 US grants and 23 published applications in this corpus.
Search patents in E21B- Granted patents
- 41
- Published applications
- 23
- Assignees
- 23
- Inventors
- 70
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 2 |
| 2002 | 0 | 0 |
| 2003 | 2 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 3 |
| 2011 | 3 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 3 |
| 2014 | 0 | 1 |
| 2015 | 3 | 1 |
| 2016 | 1 | 4 |
| 2017 | 1 | 0 |
| 2018 | 2 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 2 | 3 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device for preventing abrupt blockage in blooie line of gas drilling15 Apr 2025US 12,276,166 B2Southwest Petroleum University
- Inlet tube, rock drilling rig and method of sampling24 Dec 2024US 12,173,570 B2Sandvik Mining and Construction Oy
- Homogenizer, rock drilling rig and method of sampling12 Nov 2024US 12,139,979 B2Sandvik Mining and Construction Oy
- Drilling apparatus and method for collecting research sample6 Jul 2021US 11,053,794 B2Erimek Oy
- Automatic dust suppression system and method11 Dec 2018US 10,151,199 B2Joy Global Surface Mining Inc
- 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
- Device for preventing abrupt blockage in blooie line of gas drilling15 Feb 2024US 2024/0052713 A1Southwest Petroleum University
- Homogenizer, rock drilling rig and method of sampling4 Jan 2024US 2024/0003206 A1Sandvik Mining and Construction Oy
- Inlet tube, rock drilling rig and method of sampling4 Jan 2024US 2024/0003207 A1Sandvik Mining and Construction Oy
- Drilling apparatus and method for collecting research sample25 Jul 2019US 2019/0226338 A1Erimek Oy
Most cited
By later US patents
- Well drilling system with closed circulation of gas drilling fluid and fire suppression apparatus114US 5,890,549 A1999
- Dust conveying and collecting system and method51US 4,434,861 A1984
- Apparatus and method for geological drilling and coring41US 3,968,845 A1976
- Industrial vacuum cleaner38US 4,284,422 A1981
- Method and a machine of obtaining samples from the ground to determine its composition32US 4,332,301 A1982