C02F 1/048
Purification of waste water by evaporation
Official title: {Purification of waste water by evaporation}
C02F1/048 (Purification of waste water by evaporation) appears on 912 US grants and 961 published applications in this corpus.
Search patents in C02F- Granted patents
- 912
- Published applications
- 961
- Assignees
- 604
- Inventors
- 1,997
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 8 | 0 |
| 1978 | 11 | 0 |
| 1979 | 7 | 0 |
| 1980 | 12 | 0 |
| 1981 | 6 | 0 |
| 1982 | 8 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 9 | 0 |
| 1990 | 12 | 0 |
| 1991 | 10 | 0 |
| 1992 | 10 | 0 |
| 1993 | 18 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 12 | 0 |
| 1997 | 4 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 1 |
| 2002 | 4 | 3 |
| 2003 | 8 | 6 |
| 2004 | 2 | 9 |
| 2005 | 4 | 10 |
| 2006 | 4 | 7 |
| 2007 | 5 | 15 |
| 2008 | 15 | 25 |
| 2009 | 9 | 22 |
| 2010 | 12 | 22 |
| 2011 | 13 | 28 |
| 2012 | 25 | 38 |
| 2013 | 25 | 45 |
| 2014 | 34 | 64 |
| 2015 | 30 | 69 |
| 2016 | 42 | 58 |
| 2017 | 34 | 56 |
| 2018 | 46 | 59 |
| 2019 | 65 | 61 |
| 2020 | 72 | 58 |
| 2021 | 40 | 66 |
| 2022 | 59 | 55 |
| 2023 | 42 | 58 |
| 2024 | 44 | 67 |
| 2025 | 43 | 38 |
| 2026 | 21 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Seawater desalination equipment29 Sep 2026US 12,746,486 B2Manzeon Co., Ltd.
- Wastewater processing system and apparatus8 Sep 2026US 12,729,138 B2Skagen Energy Services Inc.
- Treating produced water for beneficial reuse8 Sep 2026US 12,729,139 B2Renovo Resources LLC
- Rotating evaporator device for liquid distillation or concentration4 Aug 2026US 12,697,563 B2Water Reuse Technology, Inc.
- Heat exchanger, method of operating a heat exchanger and process water distillation system30 Jun 2026US 12,668,508 B2KMU LOFT Cleanwater SE
- Evaporator for ambient water bodies, and related system and method8 Oct 2026US 2026/0306964 A1Resource West, Inc.
- Interfacial evaporation device for evaporation ponds24 Sep 2026US 2026/0284547 A1Saudi Arabian Oil Company
- Process for producing battery-grade lithium carbonate from wastewater solution containing lithium and sodium recovered from ternary battery24 Sep 2026US 2026/0285699 A1Hebei Leheng Energy Saving Equipment Co., Ltd.
- Closed-loop water system with integrated atmospheric water generation and greywater recycling17 Sep 2026US 2026/0274729 A1
- Onsite thermal evaporation and treatment system for produced wastewater in oil and gas operations10 Sep 2026US 2026/0265084 A1
Most cited
By later US patents
- Apparatus for high volume distillation of liquids96US 4,319,964 A1982
- Production of purified water and high value chemicals from salt water85US 7,083,730 B2University of South Carolina · 2006
- Water treatment process for thermal heavy oil recovery76US 6,536,523 B1Alberta Energy Company Ltd. · 2003
- Water treatment method for heavy oil production using calcium sulfate seed slurry evaporation76US 7,438,129 B2GE Ionics, Inc. · 2008
- Submerged combustion disposal of produced water72US 7,845,314 B22010