C02F 1/20
Treatment of water, waste water, or sewage: by degassing, i.e. liberation of
Official title: by degassing, i.e. liberation of dissolved gases (degasification of liquids in general B01D19/00; arrangement of degassing apparatus in boiler feed supply F22D)
C02F1/20 (Treatment of water, waste water, or sewage: by degassing, i.e. liberation of) appears on 1,395 US grants and 1,494 published applications in this corpus.
Search patents in C02F- Granted patents
- 1,395
- Published applications
- 1,494
- Assignees
- 979
- Inventors
- 3,344
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 5 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 7 | 0 |
| 1982 | 8 | 0 |
| 1983 | 6 | 0 |
| 1984 | 6 | 0 |
| 1985 | 15 | 0 |
| 1986 | 12 | 0 |
| 1987 | 13 | 0 |
| 1988 | 11 | 0 |
| 1989 | 19 | 0 |
| 1990 | 25 | 0 |
| 1991 | 18 | 0 |
| 1992 | 32 | 0 |
| 1993 | 31 | 0 |
| 1994 | 13 | 0 |
| 1995 | 21 | 0 |
| 1996 | 31 | 0 |
| 1997 | 18 | 0 |
| 1998 | 13 | 0 |
| 1999 | 20 | 0 |
| 2000 | 13 | 0 |
| 2001 | 24 | 9 |
| 2002 | 28 | 26 |
| 2003 | 25 | 34 |
| 2004 | 24 | 33 |
| 2005 | 20 | 35 |
| 2006 | 23 | 41 |
| 2007 | 28 | 39 |
| 2008 | 28 | 36 |
| 2009 | 14 | 43 |
| 2010 | 32 | 55 |
| 2011 | 27 | 58 |
| 2012 | 18 | 61 |
| 2013 | 38 | 58 |
| 2014 | 51 | 78 |
| 2015 | 40 | 80 |
| 2016 | 45 | 67 |
| 2017 | 60 | 71 |
| 2018 | 71 | 71 |
| 2019 | 66 | 69 |
| 2020 | 66 | 75 |
| 2021 | 53 | 84 |
| 2022 | 65 | 71 |
| 2023 | 54 | 89 |
| 2024 | 50 | 87 |
| 2025 | 53 | 76 |
| 2026 | 34 | 48 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Systems, methods, and compounds for sustainable wastewater treatment and co-products thereof8 Sep 2026US 12,729,144 B2
- Production device for pH/redox potential-adjusted water8 Sep 2026US 12,729,145 B2Kurita Water Industries Ltd.
- Systems and methods of flexible electrochemical stripping to recover alkaline ammonia and acidic ammonium from wastewaters18 Aug 2026US 12,709,560 B2The Board of Trustees of the Leland Stanford Junior University
- Continuous in-situ therapeutic treatment system for fish in freshwater, from seawater4 Aug 2026US 12,696,881 B2Salmoclinic Spa
- Systems, Devices, and Methods for Electrical Generation from Vacuum Distillation1 Oct 2026US 2026/0295457 A1American Water and Energy LLC
- Air separation system for purging hydronic loops1 Oct 2026US 2026/0295470 A1Purge Rite, LLC
- Hybrid electrodialysis and electrolysis systems and processes24 Sep 2026US 2026/0285728 A1Pani Clean, Inc.
- Ultrapure water processing system with water hammer shock mitigation function17 Sep 2026US 2026/0274710 A1Flowtech Co., Ltd.
- Method for predicting wastewater treatment performance10 Sep 2026US 2026/0265083 A1Korea Advanced Institute of Science and Technology
Most cited
By later US patents
- Medicament preparation and treatment devices, methods, and systems259US 10,478,544 B2NxStage Medical, Inc. · 2019
- Method and apparatus for dispersing a gas into a liquid155US 4,931,225 AUnion Carbide Industrial Gases Technology Corporation · 1990
- Process and system for purifying pure water or ultrapure water131US 5,073,268 AEbara Corporation · 1991
- Removal of volatile compounds and surfactants from liquid112US 5,122,165 AInternational Environmental Systems, Inc. · 1992
- Methods to de-sulfate saline streams107US 7,789,159 B12010