B03D
Flotation
Official title: FLOTATION; DIFFERENTIAL SEDIMENTATION (sedimentation in general B01D21/00; in combination with other separation of solids B03B; sink-float separation B03B5/28; detergents, soaps C11D)
B03D (Flotation) appears on 2,475 US grants and 1,520 published applications in this corpus.
Search patents in B03D- Granted patents
- 2,475
- Published applications
- 1,520
- Assignees
- 1,262
- Inventors
- 4,230
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 40 | 0 |
| 1977 | 33 | 0 |
| 1978 | 49 | 0 |
| 1979 | 41 | 0 |
| 1980 | 79 | 0 |
| 1981 | 88 | 0 |
| 1982 | 64 | 0 |
| 1983 | 48 | 0 |
| 1984 | 68 | 0 |
| 1985 | 79 | 0 |
| 1986 | 65 | 0 |
| 1987 | 53 | 0 |
| 1988 | 59 | 0 |
| 1989 | 63 | 0 |
| 1990 | 51 | 0 |
| 1991 | 59 | 0 |
| 1992 | 60 | 0 |
| 1993 | 44 | 0 |
| 1994 | 41 | 0 |
| 1995 | 37 | 0 |
| 1996 | 57 | 0 |
| 1997 | 41 | 0 |
| 1998 | 42 | 0 |
| 1999 | 43 | 0 |
| 2000 | 55 | 0 |
| 2001 | 23 | 6 |
| 2002 | 26 | 14 |
| 2003 | 23 | 41 |
| 2004 | 38 | 51 |
| 2005 | 22 | 38 |
| 2006 | 24 | 30 |
| 2007 | 22 | 38 |
| 2008 | 17 | 50 |
| 2009 | 22 | 50 |
| 2010 | 28 | 68 |
| 2011 | 32 | 64 |
| 2012 | 49 | 59 |
| 2013 | 51 | 73 |
| 2014 | 51 | 78 |
| 2015 | 61 | 79 |
| 2016 | 59 | 74 |
| 2017 | 59 | 79 |
| 2018 | 65 | 64 |
| 2019 | 64 | 72 |
| 2020 | 60 | 78 |
| 2021 | 61 | 91 |
| 2022 | 56 | 83 |
| 2023 | 51 | 83 |
| 2024 | 64 | 56 |
| 2025 | 50 | 58 |
| 2026 | 38 | 43 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
Recent patents
- Mining collectors6 Oct 2026US 12,752,286 B2
- Method and apparatus for separating valuable minerals from ore22 Sep 2026US 12,741,286 B2Kaakkois-Suomen Ammattikorkeakoulu Oy
- Mining collectors15 Sep 2026US 12,734,529 B1
- Enhanced foam fractionation of oil phase from aqueous/oil mixed phase via increased viscoelasticity8 Sep 2026US 12,729,140 B2Ecolab USA Inc.
- Method for recycling iron ore tailing and use thereof25 Aug 2026US 12,716,113 B2Baotou Research Institute of Rare Earths
- Mining chemical collector compositions and processes for recovering metal from ore8 Oct 2026US 2026/0308119 A1Chevron Phillips Chemical Company LP
- Mining chemical collector compositions and processes for recovering metal from ore1 Oct 2026US 2026/0295598 A1Chevron Phillips Chemical Company LP
- New frothers for minerals recovery and methods of making and using same17 Sep 2026US 2026/0273546 A1Syensqo SA
- Inflatable froth crowder apparatus for flotation machines27 Aug 2026US 2026/0249306 A1FLSmidth A/S
- Method for treating a suspension of solid particles in water using a polymer in a crystalline form of 2-acrylamido-2-methylpropanesulphonic acid sodium salt27 Aug 2026US 2026/0250162 A1Snf Group
Most cited
By later US patents
- Foaming surfactant compositions383US 4,565,647 AThe Procter & Gamble Company · 1986
- Tar sands extraction process312US 5,985,138 AGeopetrol Equipment Ltd. · 1999
- Air-sparged hydrocyclone and method141US 4,279,743 AUniversity of Utah · 1981
- Microalgae separator apparatus and method117US 6,524,486 B2Sepal Technologies Ltd. · 2003
- Low temperature bitumen recovery process113US 4,946,597 AEsso Resources Canada Limited · 1990