C02F 1/38
Treatment of water, waste water, or sewage: by centrifugal separation
Official title: by centrifugal separation
C02F1/38 (Treatment of water, waste water, or sewage: by centrifugal separation) appears on 1,029 US grants and 1,234 published applications in this corpus.
Search patents in C02F- Granted patents
- 1,029
- Published applications
- 1,234
- Assignees
- 774
- Inventors
- 2,523
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 7 | 0 |
| 1980 | 4 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 7 | 0 |
| 1993 | 9 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 6 | 0 |
| 1997 | 9 | 0 |
| 1998 | 9 | 0 |
| 1999 | 13 | 0 |
| 2000 | 15 | 0 |
| 2001 | 15 | 8 |
| 2002 | 22 | 27 |
| 2003 | 22 | 22 |
| 2004 | 24 | 39 |
| 2005 | 14 | 41 |
| 2006 | 17 | 27 |
| 2007 | 26 | 20 |
| 2008 | 18 | 26 |
| 2009 | 18 | 39 |
| 2010 | 29 | 63 |
| 2011 | 31 | 41 |
| 2012 | 25 | 46 |
| 2013 | 27 | 54 |
| 2014 | 51 | 64 |
| 2015 | 24 | 58 |
| 2016 | 44 | 55 |
| 2017 | 54 | 65 |
| 2018 | 41 | 65 |
| 2019 | 55 | 62 |
| 2020 | 58 | 61 |
| 2021 | 59 | 77 |
| 2022 | 47 | 63 |
| 2023 | 47 | 63 |
| 2024 | 45 | 54 |
| 2025 | 44 | 58 |
| 2026 | 28 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for processing a slurry29 Sep 2026US 12,747,645 B2Flowback Fluids LLC
- Hydrocyclone15 Sep 2026US 12,735,333 B2Sandcatch Solutions AS
- Oil-water mixture treatment device and method15 Sep 2026US 12,735,334 B2China Petroleum & Chemical Corporation
- Hydrodynamic cavitation system for the removal of unwanted, toxic, or contaminated organic and inorganic compounds25 Aug 2026US 12,715,788 B28215 Technology, Inc.
- Anoxic bioreactor treatment followed by pH adjusted peroxide/iron treatment for enhanced, efficient selenium removal in wastewaters25 Aug 2026US 12,715,802 B2Evoqua Water Technologies LLC
- Wastewater treatment system and method of treating wastewater24 Sep 2026US 2026/0285727 A1Pegras Asia Pacific Pty Ltd
- Onsite thermal evaporation and treatment system for produced wastewater in oil and gas operations10 Sep 2026US 2026/0265084 A1
- Washing machine effluent filtration with an agitator rotating around a filter element3 Sep 2026US 2026/0257157 A1MANN+HUMMEL Life Sciences & Environment Holding Singapore Pte. Ltd.
- System and Method for Desalination of Water3 Sep 2026US 2026/0257175 A1FSubsea AS
- Compact disc stack cyclone separator20 Aug 2026US 2026/0241395 A1
Most cited
By later US patents
- Continuous process for the reclamation of waste drilling fluids141US 4,482,459 ANewpark Waste Treatment Systems Inc. · 1984
- Method and apparatus for treatment of wastewater employing membrane bioreactors92US 6,805,806 B2Hydrotreat, Inc. · 2004
- Liquid treating process and apparatus, as well as liquid treating system90US 6,482,327 B1Proudo Co., Ltd. · 2002
- Methods and apparatus for the application of combined fields to disinfect fluids89US 5,997,812 ACoolant Treatment Systems, L.L.C. · 1999
- Water treatment method using an inorganic powder reagent with high specific surface area including a step of recycling said reagent83US 7,172,701 B2Otv SA · 2007