B01D 21/0084
Enhancing liquid-particle separation using the flotation principle
Official title: {Enhancing liquid-particle separation using the flotation principle (flotation in general B03D1/00)}
B01D21/0084 (Enhancing liquid-particle separation using the flotation principle) appears on 134 US grants and 152 published applications in this corpus.
Search patents in B01D- Granted patents
- 134
- Published applications
- 152
- Assignees
- 121
- Inventors
- 300
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 2 |
| 2003 | 1 | 4 |
| 2004 | 2 | 2 |
| 2005 | 5 | 3 |
| 2006 | 0 | 1 |
| 2007 | 1 | 3 |
| 2008 | 2 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 4 |
| 2011 | 1 | 2 |
| 2012 | 1 | 3 |
| 2013 | 2 | 13 |
| 2014 | 5 | 4 |
| 2015 | 2 | 5 |
| 2016 | 10 | 14 |
| 2017 | 11 | 15 |
| 2018 | 9 | 8 |
| 2019 | 5 | 8 |
| 2020 | 12 | 9 |
| 2021 | 4 | 11 |
| 2022 | 11 | 12 |
| 2023 | 3 | 10 |
| 2024 | 10 | 4 |
| 2025 | 7 | 13 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Methods and apparatus for oil demulsification and separation of oil and suspended solids from produced water33US 6,875,351 B2Hydrotreat, Inc. · 2005
- Wastewater treatment system and method32US 5,637,221 A1997
- Apparatus for clarifying waste water28US 4,184,967 ALenox Institute for Research, Inc. · 1980
- Wastewater treatment system and method25US 5,540,836 A1996
- Air flotation clarifier23US 4,681,682 AAlar Engineering Corporation · 1987