B01D 21/00
Separation of suspended solid particles from liquids by sedimentation
Official title: Separation of suspended solid particles from liquids by sedimentation ({separation of ores or the like by sedimentation B03B5/48 - B03B5/60} ; differential sedimentation B03D3/00; {purification of water, waste water, sewage or sludge C02F, e.g.} devices for separating or removing fatty or oily substances or similar floating material from water, waste water or sewage C02F1/40)
B01D21/00 (Separation of suspended solid particles from liquids by sedimentation) appears on 5,365 US grants and 4,625 published applications in this corpus.
Search patents in B01D- Granted patents
- 5,365
- Published applications
- 4,625
- Assignees
- 2,888
- Inventors
- 9,578
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 79 | 0 |
| 1977 | 59 | 0 |
| 1978 | 57 | 0 |
| 1979 | 64 | 0 |
| 1980 | 53 | 0 |
| 1981 | 49 | 0 |
| 1982 | 61 | 0 |
| 1983 | 42 | 0 |
| 1984 | 39 | 0 |
| 1985 | 39 | 0 |
| 1986 | 28 | 0 |
| 1987 | 44 | 0 |
| 1988 | 39 | 0 |
| 1989 | 54 | 0 |
| 1990 | 65 | 0 |
| 1991 | 76 | 0 |
| 1992 | 64 | 0 |
| 1993 | 59 | 0 |
| 1994 | 84 | 0 |
| 1995 | 92 | 0 |
| 1996 | 118 | 0 |
| 1997 | 128 | 0 |
| 1998 | 133 | 0 |
| 1999 | 109 | 0 |
| 2000 | 112 | 0 |
| 2001 | 108 | 30 |
| 2002 | 76 | 98 |
| 2003 | 91 | 89 |
| 2004 | 72 | 113 |
| 2005 | 71 | 107 |
| 2006 | 72 | 120 |
| 2007 | 81 | 111 |
| 2008 | 69 | 109 |
| 2009 | 71 | 109 |
| 2010 | 83 | 111 |
| 2011 | 84 | 180 |
| 2012 | 93 | 160 |
| 2013 | 121 | 235 |
| 2014 | 131 | 215 |
| 2015 | 154 | 272 |
| 2016 | 186 | 252 |
| 2017 | 226 | 266 |
| 2018 | 234 | 298 |
| 2019 | 220 | 258 |
| 2020 | 250 | 299 |
| 2021 | 273 | 301 |
| 2022 | 239 | 237 |
| 2023 | 202 | 216 |
| 2024 | 174 | 176 |
| 2025 | 148 | 162 |
| 2026 | 89 | 101 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 21/24Feed or discharge mechanisms for settling tanks2,359
- B01D 21/26Separation of sediment aided by centrifugal force or centripetal force1,826
- B01D 21/0039Settling tanks provided with contact surfaces1,071
- B01D 21/30Control equipment1,028
- B01D 21/02Settling tanks with single outlets for the separated liquid966
- B01D 21/01Separation of suspended solid particles from liquids by sedimentation: using flocculating agents828
- B01D 21/0012Settling tanks making use of filters769
- B01D 21/28Mechanical auxiliary equipment for acceleration of sedimentation410
All 23 subgroupsShow fewer
- B01D 21/003Sedimentation tanks provided with a plurality of compartments separated by a partition367
- B01D 21/0003Making of sedimentation devices, structural details thereof364
- B01D 21/0006Settling tanks provided with means for cleaning and maintenance341
- B01D 21/10Settling tanks with multiple outlets for the separated liquids330
- B01D 21/0087Settling tanks provided with means for ensuring a special flow pattern275
- B01D 21/0009Settling tanks making use of electricity or magnetism270
- B01D 21/0018Provided with a pump mounted in or on a settling tank222
- B01D 21/18Construction of the scrapers or the driving mechanisms for settling tanks216
- B01D 21/0024Inlets or outlets provided with regulating devices188
- B01D 21/009Heating or cooling mechanisms specially adapted for settling tanks173
- B01D 21/0084Enhancing liquid-particle separation using the flotation principle134
- B01D 21/0027Floating sedimentation devices80
- B01D 21/0093Mechanisms for taking out of action one or more units of a47
- B01D 21/0015Controlling the inclination of settling devices30
- B01D 21/0096Safety mechanisms specially adapted for settling tanks21
Recent patents
- System and method for processing a slurry29 Sep 2026US 12,747,645 B2Flowback Fluids LLC
- Recovery tank22 Sep 2026US 12,740,683 B2SharkNinja Operating LLC
- circCDK13-enriched engineered small extracellular vesicle (E-sEV), and preparation method and use thereof22 Sep 2026US 12,740,945 B2Chinese Pla General Hospital
- Removal device15 Sep 2026US 12,734,466 B2Aalberts hfc B.V.
- Apparatus and process for separating components of a multiphase hydrocarbon stream15 Sep 2026US 12,734,531 B2Omv Downstream GmbH
- Hydrodynamic separator with multiple settling sump cones8 Oct 2026US 2026/0306971 A1Advanced Drainage Systems, Inc.
- Method for producing dried solid, and dried solid8 Oct 2026US 2026/0308365 A1Yokogawa Electric 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
- Systems for Grit Removal1 Oct 2026US 2026/0295473 A1
- Methods and systems for organic recovery in solvent extraction1 Oct 2026US 2026/0295474 A1Freeport Minerals Corporation
Most cited
By later US patents
- Robust system for screening mail for biological agents1,080US 6,887,710 B2MesoSystems Technology, Inc. · 2005
- Apparatus and method for separating particles from a cyclonic fluid flow270US 6,251,296 B1G. B. D. Corp. · 2001
- Enhanced yield platelet collection systems and methods216US 5,370,802 ABaxter International Inc. · 1994
- Particle handling apparatus for handling particles in fluid by acoustic radiation pressure211US 6,216,538 B1Hitachi, Ltd. · 2001
- Particle handling method by acoustic radiation force and apparatus therefore207US 5,902,489 AHitachi, Ltd. · 1999