B01D 21/18
Construction of the scrapers or the driving mechanisms for settling tanks
B01D21/18 (Construction of the scrapers or the driving mechanisms for settling tanks) appears on 216 US grants and 90 published applications in this corpus.
Search patents in B01D- Granted patents
- 216
- Published applications
- 90
- Assignees
- 116
- Inventors
- 301
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 10 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 6 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 11 | 0 |
| 1996 | 11 | 0 |
| 1997 | 9 | 0 |
| 1998 | 13 | 0 |
| 1999 | 8 | 0 |
| 2000 | 8 | 0 |
| 2001 | 10 | 1 |
| 2002 | 6 | 3 |
| 2003 | 3 | 5 |
| 2004 | 2 | 7 |
| 2005 | 3 | 2 |
| 2006 | 2 | 4 |
| 2007 | 6 | 6 |
| 2008 | 2 | 2 |
| 2009 | 2 | 4 |
| 2010 | 4 | 2 |
| 2011 | 4 | 5 |
| 2012 | 3 | 3 |
| 2013 | 0 | 5 |
| 2014 | 2 | 1 |
| 2015 | 3 | 7 |
| 2016 | 5 | 2 |
| 2017 | 6 | 2 |
| 2018 | 1 | 2 |
| 2019 | 1 | 1 |
| 2020 | 2 | 8 |
| 2021 | 9 | 7 |
| 2022 | 2 | 1 |
| 2023 | 3 | 1 |
| 2024 | 1 | 5 |
| 2025 | 2 | 1 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Roller for chain and scraper assembly3 Feb 2026US 12,539,473 B2Evoqua Water Technologies LLC
- Bearing wear monitoring device for circular clarifier drive5 Aug 2025US 12,378,993 B2Evoqua Water Technologies LLC
- Large-flux ultra-fine grid system with non-rotating screen plates28 Jan 2025US 12,208,345 B2North China Municipal Engineering Design & Research Institute Co., Ltd.
- Treatment device and method9 Jul 2024US 12,030,060 B2FSM Frankenberger GmbH
- Systems and processes for removing pollutants from water, reducing greenhouse gas emissions, and reducing aquatic ecosystem destruction27 Jun 2023US 11,685,682 B1
- 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
- Sludge treatment device18 Jun 2026US 2026/0166591 A1Suido Kiko Kaisha, Ltd.
- Non-metallic conveyor chain having improved durability, and sludge removal facility including same24 Jul 2025US 2025/0236467 A1Linkon Technology Co., Ltd.
- Shearing device, arrangement and use19 Dec 2024US 2024/0416261 A1Metso Finland Oy
Most cited
By later US patents
- Device for separating a blood component from blood or plasma94US 5,738,784 AE. R. Squibb & Sons, Inc. · 1998
- Apparatus and method for separation of solids from liquid82US 5,814,230 A1998
- Conveyor chain and transverse member monitoring apparatus73US 10,807,804 B2Brentwood Industries, Inc. · 2020
- Apparatus for water purification by culturing and harvesting attached algal communities72US 5,527,456 A1996
- Centrifuge tube and adaptor71US 5,422,018 AApplied Imaging Corporation · 1995