B01D 21/06
With rotating scrapers
Official title: with rotating scrapers
B01D21/06 (With rotating scrapers) appears on 151 US grants and 99 published applications in this corpus.
Search patents in B01D- Granted patents
- 151
- Published applications
- 99
- Assignees
- 118
- Inventors
- 303
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 8 | 0 |
| 1978 | 6 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 9 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 7 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 2 |
| 2002 | 4 | 2 |
| 2003 | 2 | 4 |
| 2004 | 3 | 7 |
| 2005 | 3 | 5 |
| 2006 | 2 | 3 |
| 2007 | 6 | 9 |
| 2008 | 2 | 2 |
| 2009 | 6 | 3 |
| 2010 | 1 | 4 |
| 2011 | 2 | 6 |
| 2012 | 1 | 2 |
| 2013 | 4 | 8 |
| 2014 | 5 | 6 |
| 2015 | 1 | 6 |
| 2016 | 5 | 0 |
| 2017 | 2 | 5 |
| 2018 | 2 | 5 |
| 2019 | 1 | 0 |
| 2020 | 2 | 6 |
| 2021 | 5 | 2 |
| 2022 | 3 | 1 |
| 2023 | 1 | 3 |
| 2024 | 1 | 4 |
| 2025 | 1 | 0 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Headrace system13 Jan 2026US 12,522,518 B2Utsunomiya Kogyo Co., Ltd.
- Wastewater heat exchange system16 Sep 2025US 12,415,149 B2SHARC Energy Systems Inc.
- Clarifier with improved energy dissipating inlet26 Nov 2024US 12,151,186 B2Ovivo Inc.
- Clarifier with independent sump scraper drive16 May 2023US 11,648,493 B2Kadant Black Clawson LLC
- Flocculation and sedimentation apparatus9 Aug 2022US 11,406,919 B2Organo Corporation
- System for cleaning equipment intended to be placed in a solid/liquid separation settler, and associated installation and method1 Oct 2026US 2026/0295472 A1Suez International
- Rotary scraper and method for discharging foreign matter having high specific gravity in gypsum slurry13 Aug 2026US 2026/0233127 A1Tokuyama Corporation
- High-rate settling clarifier with increased turn down capabilities30 Apr 2026US 2026/0116795 A1Suez International
- Method, apparatus, and system to optimize flocculation of solid particles in a settling vessel26 Mar 2026US 2026/0084080 A1
- Shearing device, arrangement and use19 Dec 2024US 2024/0416261 A1Metso Finland Oy
Most cited
By later US patents
- Process and apparatus for the chemical-mechanical treatment and purification of ground waters, surface waters and effluents69US 4,388,195 APassavant-Werke Michelbacher Hutte · 1983
- Deep bed thickener/clarifiers with enhanced liquid removal63US 6,758,978 B1GL&V Management Hungary Kft · 2004
- Thickener control system60US 4,226,714 AThe Anaconda Company · 1980
- Method and installation for treating an untreated flow by simple sedimentation after ballasting with fine sand50US 6,010,631 AOmnium de Traitement et de Valorisation (OTV) · 2000
- Tube settler module42US 4,346,005 ACrane Co. · 1982