C02F 1/24
Treatment of water, waste water, or sewage: by flotation
Official title: by flotation (C02F1/465 takes precedence)
C02F1/24 (Treatment of water, waste water, or sewage: by flotation) appears on 1,124 US grants and 1,174 published applications in this corpus.
Search patents in C02F- Granted patents
- 1,124
- Published applications
- 1,174
- Assignees
- 811
- Inventors
- 2,431
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 8 | 0 |
| 1978 | 15 | 0 |
| 1979 | 8 | 0 |
| 1980 | 17 | 0 |
| 1981 | 11 | 0 |
| 1982 | 7 | 0 |
| 1983 | 9 | 0 |
| 1984 | 8 | 0 |
| 1985 | 9 | 0 |
| 1986 | 7 | 0 |
| 1987 | 7 | 0 |
| 1988 | 17 | 0 |
| 1989 | 7 | 0 |
| 1990 | 12 | 0 |
| 1991 | 12 | 0 |
| 1992 | 18 | 0 |
| 1993 | 14 | 0 |
| 1994 | 14 | 0 |
| 1995 | 15 | 0 |
| 1996 | 26 | 0 |
| 1997 | 19 | 0 |
| 1998 | 17 | 0 |
| 1999 | 11 | 0 |
| 2000 | 15 | 0 |
| 2001 | 20 | 5 |
| 2002 | 21 | 26 |
| 2003 | 16 | 33 |
| 2004 | 22 | 30 |
| 2005 | 25 | 26 |
| 2006 | 16 | 26 |
| 2007 | 18 | 35 |
| 2008 | 21 | 32 |
| 2009 | 19 | 33 |
| 2010 | 19 | 44 |
| 2011 | 20 | 36 |
| 2012 | 27 | 51 |
| 2013 | 30 | 62 |
| 2014 | 34 | 62 |
| 2015 | 40 | 58 |
| 2016 | 38 | 61 |
| 2017 | 43 | 52 |
| 2018 | 39 | 50 |
| 2019 | 57 | 70 |
| 2020 | 44 | 53 |
| 2021 | 51 | 73 |
| 2022 | 48 | 53 |
| 2023 | 36 | 60 |
| 2024 | 36 | 59 |
| 2025 | 43 | 48 |
| 2026 | 25 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Enhanced foam fractionation of oil phase from aqueous/oil mixed phase via increased viscoelasticity8 Sep 2026US 12,729,140 B2Ecolab USA Inc.
- Mobile clarifier system28 Jul 2026US 12,692,178 B2Monroe Environmental Corporation
- Method for process water treatment14 Jul 2026US 12,679,754 B2Metso Finland Oy
- Portable system for purification of liquids2 Jun 2026US 12,643,805 B2
- Water treatment apparatus26 May 2026US 12,637,366 B1
- Method and system for treatment of pfas contaminated wastewater and water utilizing gas nanobubbles24 Sep 2026US 2026/0285708 A1Streamgo Water Solutions Inc.
- Synergistic integrated methods for processing hydrocarbon/organic matter containing water streams17 Sep 2026US 2026/0274728 A1
- A treatment method of at least one colloidal toc present in wastewater27 Aug 2026US 2026/0250163 A1Snf Group
- Separation of fluids containing solids13 Aug 2026US 2026/0233236 A1World Water Works, Inc.
- A system and a method for collection of micro-plastics13 Aug 2026US 2026/0234886 A1
Most cited
By later US patents
- Surfactant mixtures, stable gas-in-liquid emulsions, and methods for the production of such emulsions from said mixtures246US 4,684,479 A1987
- Continuous process for the reclamation of waste drilling fluids141US 4,482,459 ANewpark Waste Treatment Systems Inc. · 1984
- Microalgae separator apparatus and method117US 6,524,486 B2Sepal Technologies Ltd. · 2003
- Hide raceway treatment and improved method of curing hides107US 5,435,808 ABirko Corporation · 1995
- Process and apparatus for removing impurities from water used in food processing utilizing a mixture of ozone and air90US 5,053,140 AAmerican Water Purification, Inc. · 1991