B01D 21/0039
Settling tanks provided with contact surfaces
Official title: {Settling tanks provided with contact surfaces, e.g. baffles, particles}
B01D21/0039 (Settling tanks provided with contact surfaces) appears on 1,071 US grants and 771 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,071
- Published applications
- 771
- Assignees
- 627
- Inventors
- 1,809
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 12 | 0 |
| 1978 | 17 | 0 |
| 1979 | 16 | 0 |
| 1980 | 16 | 0 |
| 1981 | 15 | 0 |
| 1982 | 9 | 0 |
| 1983 | 9 | 0 |
| 1984 | 10 | 0 |
| 1985 | 9 | 0 |
| 1986 | 9 | 0 |
| 1987 | 10 | 0 |
| 1988 | 8 | 0 |
| 1989 | 11 | 0 |
| 1990 | 13 | 0 |
| 1991 | 9 | 0 |
| 1992 | 15 | 0 |
| 1993 | 15 | 0 |
| 1994 | 15 | 0 |
| 1995 | 17 | 0 |
| 1996 | 36 | 0 |
| 1997 | 31 | 0 |
| 1998 | 34 | 0 |
| 1999 | 28 | 0 |
| 2000 | 25 | 0 |
| 2001 | 24 | 6 |
| 2002 | 15 | 16 |
| 2003 | 19 | 26 |
| 2004 | 22 | 34 |
| 2005 | 25 | 27 |
| 2006 | 26 | 24 |
| 2007 | 21 | 29 |
| 2008 | 14 | 22 |
| 2009 | 18 | 28 |
| 2010 | 20 | 27 |
| 2011 | 22 | 30 |
| 2012 | 29 | 24 |
| 2013 | 17 | 31 |
| 2014 | 24 | 35 |
| 2015 | 22 | 39 |
| 2016 | 21 | 29 |
| 2017 | 33 | 28 |
| 2018 | 41 | 46 |
| 2019 | 25 | 34 |
| 2020 | 46 | 54 |
| 2021 | 50 | 43 |
| 2022 | 36 | 34 |
| 2023 | 43 | 39 |
| 2024 | 18 | 27 |
| 2025 | 24 | 19 |
| 2026 | 13 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 21/0042Baffles or guide plates548
- B01D 21/0045Plurality of essentially parallel plates406
- B01D 21/0069Making of contact surfaces, structural details, materials therefor138
- B01D 21/0057With counter-current flow direction of liquid and solid particles96
- B01D 21/0051Plurality of tube like channels81
- B01D 21/0066With a meandering flow pattern of liquid or solid particles47
- B01D 21/0063With cross-flow flow direction of liquid and solid particles39
- B01D 21/0048Plurality of plates inclined in alternating directions35
Recent patents
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- Device and method for coalescence separation18 Aug 2026US 12,708,865 B2ENI S. p. A.
- Coalescer plate with phyllotaxis-derived pattern11 Aug 2026US 12,702,938 B2Saudi Arabian Oil Company
- Hydrodynamic separator with multiple settling sump cones8 Oct 2026US 2026/0306971 A1Advanced Drainage Systems, Inc.
- 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
- Systems for Grit Removal1 Oct 2026US 2026/0295473 A1
- Separation of fluids containing solids13 Aug 2026US 2026/0233236 A1World Water Works, Inc.
- Stormwater management system for urban storage and recovery13 Aug 2026US 2026/0234042 A1
Most cited
By later US patents
- Apparatus and method for removing fine particles from a liquid medium by ultrasonic waves175US 4,055,491 A1977
- Apparatus and method for separating blood components123US 4,424,132 AAsahi Kasei Kogyo Kabushiki Kaisha · 1984
- Waste treatment system having integral intrachannel clarifier111US 4,446,018 AArmco Inc. · 1984
- Method for separating components in well fluids77US 5,928,519 A1999
- Oil-water separator73US 4,722,800 AHighland Tank and Manufacturing Company · 1988