C02F 1/02
Treatment of water, waste water, or sewage: by heating
Official title: by heating (methods of steam generation F22B; preheating boiler feed-water or accumulating preheated boiler feed-water F22D)
C02F1/02 (Treatment of water, waste water, or sewage: by heating) appears on 3,538 US grants and 3,703 published applications in this corpus.
Search patents in C02F- Granted patents
- 3,538
- Published applications
- 3,703
- Assignees
- 2,022
- Inventors
- 7,805
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 49 | 0 |
| 1977 | 37 | 0 |
| 1978 | 47 | 0 |
| 1979 | 41 | 0 |
| 1980 | 60 | 0 |
| 1981 | 46 | 0 |
| 1982 | 62 | 0 |
| 1983 | 30 | 0 |
| 1984 | 28 | 0 |
| 1985 | 21 | 0 |
| 1986 | 25 | 0 |
| 1987 | 28 | 0 |
| 1988 | 27 | 0 |
| 1989 | 43 | 0 |
| 1990 | 49 | 0 |
| 1991 | 37 | 0 |
| 1992 | 44 | 0 |
| 1993 | 48 | 0 |
| 1994 | 28 | 0 |
| 1995 | 35 | 0 |
| 1996 | 47 | 0 |
| 1997 | 32 | 0 |
| 1998 | 40 | 0 |
| 1999 | 33 | 0 |
| 2000 | 37 | 0 |
| 2001 | 40 | 8 |
| 2002 | 47 | 57 |
| 2003 | 52 | 53 |
| 2004 | 33 | 79 |
| 2005 | 40 | 87 |
| 2006 | 37 | 72 |
| 2007 | 43 | 87 |
| 2008 | 55 | 88 |
| 2009 | 49 | 93 |
| 2010 | 52 | 113 |
| 2011 | 60 | 141 |
| 2012 | 67 | 151 |
| 2013 | 84 | 136 |
| 2014 | 112 | 191 |
| 2015 | 108 | 193 |
| 2016 | 111 | 201 |
| 2017 | 123 | 191 |
| 2018 | 149 | 197 |
| 2019 | 203 | 205 |
| 2020 | 213 | 212 |
| 2021 | 182 | 218 |
| 2022 | 157 | 209 |
| 2023 | 154 | 215 |
| 2024 | 159 | 238 |
| 2025 | 144 | 161 |
| 2026 | 90 | 107 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Preparation method of high-efficiency gel for seawater desalination6 Oct 2026US 12,752,249 B2Shanghai Maritime University
- System and method embodiments for treating produced water using supercritical water desalination coupled with supercritical water oxidation6 Oct 2026US 12,753,101 B1Triad National Security, LLC
- Hot flushing of building water system6 Oct 2026US 12,753,585 B2Magarl, LLC
- Seawater desalination equipment29 Sep 2026US 12,746,486 B2Manzeon Co., Ltd.
- Resonant thermal oscillator to improve output of a thermo-fluidic system22 Sep 2026US 12,741,232 B2William Marsh Rice University
- Evaporator for ambient water bodies, and related system and method8 Oct 2026US 2026/0306964 A1Resource West, Inc.
- Water purifier that uses waste heat from thermoelectric element8 Oct 2026US 2026/0308018 A1Coway Co., Ltd.
- Systems, Devices, and Methods for Electrical Generation from Vacuum Distillation1 Oct 2026US 2026/0295457 A1American Water and Energy LLC
- Additive combination for treatment of heavy metals and dioxins in fly ash1 Oct 2026US 2026/0295645 A1Zhejiang University
- Distillation system pressure control system and method1 Oct 2026US 2026/0296924 A1Honeywell International Inc.
Most cited
By later US patents
- Scavenger energy converter system its new applications and its control systems239US 6,327,994 B12001
- Method and system for producing sterile aqueous solutions193US 5,032,265 AMillipore Corporation · 1991
- Water line decontamination system167US 5,526,841 A1996
- Water treatment method for heavy oil production150US 6,733,636 B1Ionics, Incorporated · 2004
- Processing methods for the oxidation of organics in supercritical water136US 4,543,190 AModar, Inc. · 1985