B01D 21/186
With two or more scrapers fixed at different heights on a central
Official title: {with two or more scrapers fixed at different heights on a central rotating shaft}
B01D21/186 (With two or more scrapers fixed at different heights on a central) appears on 10 US grants and 8 published applications in this corpus.
Search patents in B01D- Granted patents
- 10
- Published applications
- 8
- Assignees
- 5
- Inventors
- 16
- Latest grant
- 9 Jul 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 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 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 2 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Treatment device and method9 Jul 2024US 12,030,060 B2FSM Frankenberger GmbH
- Clarifier with submerged effluent launder and launder sweeper system17 May 2022US 11,331,601 B2Ovivo Inc.
- Method for recycling of oil based drilling fluid contaminated with water and water contaminated with oil based drilling fluid16 Mar 2010US 7,678,280 B2M - I L. L. C.
- Method for recycling of oil based drilling fluid contaminated with water and water contaminated with oil based drilling fluid24 Mar 2009US 7,507,344 B2M - I L. L. C.
- Apparatus for production, withdrawal and transfer of highly viscous slurry6 Jan 2009US 7,473,376 B2Alcan International Limited
- Treatment device and method3 Aug 2023US 2023/0241622 A1FSM Frankenberger GmbH
- Clarifier with Submerged Effluent Launder and Launder Sweeper System28 Oct 2021US 2021/0331091 A1Ovivo Inc.
- Method for recycling of oil based drilling fluid contaminated with water and water contaminated with oil based drilling fluid23 Jul 2009US 2009/0184055 A1M - I L. L. C.
- Apparatus for recycling of oil based drilling fluid contaminated with water and water contaminated with oil based drilling fluid13 Mar 2008US 2008/0061003 A1M - I L. L. C.
- Apparatus for production, withdrawal and transfer of highly viscous slurry1 Mar 2007US 2007/0045202 A1Alcan International Limited
Most cited
By later US patents
- Method for recycling of oil based drilling fluid contaminated with water and water contaminated with oil based drilling fluid28US 6,881,349 B2M - I L. L. C. · 2005
- Weir cleaning apparatus and method13US 5,720,890 A1998
- Apparatus for cleaning water treatment tank surfaces10US 6,016,924 A2000
- Apparatus for superflocculating and thickening a sludge7US 4,347,135 AFives-Cail Babcock · 1982
- Apparatus for recycling of oil-based drilling fluid contaminated with water and water contaminated with oil based drilling fluid5US 7,300,578 B2M - I L. L. C. · 2007