B03D 1/14
Flotation machines
Official title: Flotation machines (devices for feeding measured quantities of reagents B01J4/02; flotation apparatus for enzymology or microbiology C12M1/09)
B03D1/14 (Flotation machines) appears on 1,105 US grants and 741 published applications in this corpus.
Search patents in B03D- Granted patents
- 1,105
- Published applications
- 741
- Assignees
- 669
- Inventors
- 1,868
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 8 | 0 |
| 1978 | 16 | 0 |
| 1979 | 13 | 0 |
| 1980 | 28 | 0 |
| 1981 | 23 | 0 |
| 1982 | 16 | 0 |
| 1983 | 16 | 0 |
| 1984 | 20 | 0 |
| 1985 | 15 | 0 |
| 1986 | 17 | 0 |
| 1987 | 10 | 0 |
| 1988 | 20 | 0 |
| 1989 | 22 | 0 |
| 1990 | 24 | 0 |
| 1991 | 26 | 0 |
| 1992 | 30 | 0 |
| 1993 | 26 | 0 |
| 1994 | 27 | 0 |
| 1995 | 18 | 0 |
| 1996 | 38 | 0 |
| 1997 | 26 | 0 |
| 1998 | 27 | 0 |
| 1999 | 22 | 0 |
| 2000 | 34 | 0 |
| 2001 | 13 | 5 |
| 2002 | 14 | 9 |
| 2003 | 14 | 27 |
| 2004 | 25 | 40 |
| 2005 | 15 | 19 |
| 2006 | 12 | 15 |
| 2007 | 12 | 21 |
| 2008 | 10 | 30 |
| 2009 | 14 | 25 |
| 2010 | 16 | 31 |
| 2011 | 21 | 32 |
| 2012 | 26 | 31 |
| 2013 | 21 | 43 |
| 2014 | 25 | 34 |
| 2015 | 31 | 37 |
| 2016 | 27 | 35 |
| 2017 | 19 | 29 |
| 2018 | 33 | 25 |
| 2019 | 29 | 31 |
| 2020 | 24 | 47 |
| 2021 | 34 | 43 |
| 2022 | 27 | 36 |
| 2023 | 22 | 36 |
| 2024 | 36 | 24 |
| 2025 | 29 | 27 |
| 2026 | 18 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B03D 1/1443Feed or discharge mechanisms for flotation tanks610
- B03D 1/24Pneumatic552
- B03D 1/1412With baffles335
- B03D 1/1431Dissolved air flotation machines302
- B03D 1/1493With means for establishing a specified flow pattern271
- B03D 1/16With impellers239
- B03D 1/1418Using centrifugal forces178
- B03D 1/1406With special arrangement of a plurality of flotation cells135
Recent patents
- Method and apparatus for separating valuable minerals from ore22 Sep 2026US 12,741,286 B2Kaakkois-Suomen Ammattikorkeakoulu Oy
- Enhanced foam fractionation of oil phase from aqueous/oil mixed phase via increased viscoelasticity8 Sep 2026US 12,729,140 B2Ecolab USA Inc.
- Rotor of gas dispersion arrangement4 Aug 2026US 12,697,626 B2Metso Finland Oy
- Coarse particle flotation equipment and method based on coupled fluidization of cyclone and damping4 Aug 2026US 12,697,627 B2Central South University
- Paint sludge separator tank using froth floatation14 Jul 2026US 12,678,715 B2Giffin, Inc.
- Inflatable froth crowder apparatus for flotation machines27 Aug 2026US 2026/0249306 A1FLSmidth A/S
- Separation of fluids containing solids13 Aug 2026US 2026/0233236 A1World Water Works, Inc.
- Scum removal system in sewage treatment plant30 Jul 2026US 2026/0217571 A1Utsunomiya Kogyo Co., Ltd.
- Gasification device30 Apr 2026US 2026/0115678 A1
- Fractionated stillage processing5 Mar 2026US 2026/0060280 A1ICM, Inc.
Most cited
By later US patents
- Air-sparged hydrocyclone and method141US 4,279,743 AUniversity of Utah · 1981
- Microalgae separator apparatus and method117US 6,524,486 B2Sepal Technologies Ltd. · 2003
- Method and apparatus for treatment of wastewater employing membrane bioreactors92US 6,805,806 B2Hydrotreat, Inc. · 2004
- Process and apparatus for separating fine particles by microbubble flotation together with a process and apparatus for generation of microbubbles82US 4,981,582 AVirginia Tech Intellectual Properties, Inc. · 1991
- Air sparged hydrocyclone flotation apparatus and methods for separating particles from a particulate suspension80US 4,838,434 AUniversity of Utah · 1989