B03D 1/1431
Dissolved air flotation machines
Official title: {Dissolved air flotation machines}
B03D1/1431 (Dissolved air flotation machines) appears on 302 US grants and 227 published applications in this corpus.
Search patents in B03D- Granted patents
- 302
- Published applications
- 227
- Assignees
- 218
- Inventors
- 498
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 1 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 11 | 0 |
| 1981 | 8 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 7 | 0 |
| 1991 | 5 | 0 |
| 1992 | 11 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 7 | 0 |
| 1997 | 8 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 8 | 0 |
| 2001 | 3 | 1 |
| 2002 | 3 | 4 |
| 2003 | 7 | 9 |
| 2004 | 7 | 15 |
| 2005 | 5 | 6 |
| 2006 | 6 | 3 |
| 2007 | 2 | 6 |
| 2008 | 2 | 9 |
| 2009 | 5 | 6 |
| 2010 | 3 | 10 |
| 2011 | 7 | 12 |
| 2012 | 8 | 17 |
| 2013 | 11 | 12 |
| 2014 | 4 | 6 |
| 2015 | 10 | 10 |
| 2016 | 6 | 13 |
| 2017 | 8 | 13 |
| 2018 | 11 | 5 |
| 2019 | 7 | 3 |
| 2020 | 6 | 17 |
| 2021 | 5 | 11 |
| 2022 | 8 | 13 |
| 2023 | 6 | 12 |
| 2024 | 13 | 6 |
| 2025 | 7 | 6 |
| 2026 | 7 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for process water treatment14 Jul 2026US 12,679,754 B2Metso Finland Oy
- Water treatment apparatus26 May 2026US 12,637,366 B1
- Reactor sparger assembly10 Mar 2026US 12,569,819 B2Solugen, Inc.
- Method and arrangement for process water treatment17 Feb 2026US 12,551,903 B2Metso Finland Oy
- Method and system for treating fluid and flotation arrangement10 Feb 2026US 12,545,599 B2Metso Finland Oy
- Fractionated stillage processing5 Mar 2026US 2026/0060280 A1ICM, Inc.
- Effluent Treatment System26 Feb 2026US 2026/0054232 A1RKM IP Holding LLC
- Fluid treatment system, separator and method using a magnetic field25 Dec 2025US 2025/0387732 A1RJ Enterprises, Inc.
- Nanogas shear processing6 Nov 2025US 2025/0339790 A1Nanogas Technologies Inc.
- Method and apparatus for treating water containing per- and polyfluoroalkyl substances (pfas)12 Jun 2025US 2025/0187943 A1Ultraaqua A/S
Most cited
By later US patents
- 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
- Apparatus and method for separating particles from a fluid suspension74US 4,397,741 AUniversity of Utah · 1983
- Centrifugal flotation separator72US 4,094,783 A1978