C02F 2301/00
General aspects of water treatment
C02F2301/00 (General aspects of water treatment) appears on 3,322 US grants and 4,863 published applications in this corpus.
Search patents in C02F- Granted patents
- 3,322
- Published applications
- 4,863
- Assignees
- 2,460
- Inventors
- 9,182
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 9 | 0 |
| 1978 | 16 | 0 |
| 1979 | 9 | 0 |
| 1980 | 8 | 0 |
| 1981 | 8 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 9 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 4 | 0 |
| 1990 | 9 | 0 |
| 1991 | 10 | 0 |
| 1992 | 9 | 0 |
| 1993 | 13 | 0 |
| 1994 | 11 | 0 |
| 1995 | 17 | 0 |
| 1996 | 13 | 0 |
| 1997 | 15 | 0 |
| 1998 | 21 | 0 |
| 1999 | 28 | 0 |
| 2000 | 29 | 0 |
| 2001 | 33 | 10 |
| 2002 | 43 | 48 |
| 2003 | 39 | 75 |
| 2004 | 53 | 97 |
| 2005 | 59 | 105 |
| 2006 | 48 | 140 |
| 2007 | 68 | 112 |
| 2008 | 60 | 102 |
| 2009 | 68 | 113 |
| 2010 | 70 | 129 |
| 2011 | 69 | 142 |
| 2012 | 86 | 134 |
| 2013 | 79 | 178 |
| 2014 | 104 | 167 |
| 2015 | 92 | 209 |
| 2016 | 115 | 204 |
| 2017 | 122 | 201 |
| 2018 | 139 | 261 |
| 2019 | 194 | 262 |
| 2020 | 251 | 283 |
| 2021 | 222 | 355 |
| 2022 | 210 | 335 |
| 2023 | 231 | 317 |
| 2024 | 196 | 331 |
| 2025 | 229 | 319 |
| 2026 | 166 | 234 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Control center box and flexible bathtub6 Oct 2026US 12,751,582 B2Jiaxing Virpol Sanitary Ware co., LTD.
- Hybrid system and method of waste heat utilization-based photovoltaic power generation and seawater desalination6 Oct 2026US 12,752,240 B2Xi' An Jiaotong University
- Hot flushing of building water system6 Oct 2026US 12,753,585 B2Magarl, LLC
- Pool skimmer6 Oct 2026US 12,753,619 B1Sichuan Cootway Technology Co., Ltd.
- Method and apparatus for water processing29 Sep 2026US 12,746,520 B2
- Equipment and method for removing a supernatant phase from a body of water in a polluted groundwater8 Oct 2026US 2026/0307123 A1ENI S. p. A.
- Systems, Methods, and Apparatuses for Producing and Packaging Medical Fluids8 Oct 2026US 2026/0307835 A1
- Utilization of an ultra-high pressure reverse osmosis membrane system to treat industrial wastewater or a reverse osmosis reject waste stream8 Oct 2026US 2026/0308017 A1Renovo Resources LLC
- Water purifier that uses waste heat from thermoelectric element8 Oct 2026US 2026/0308018 A1Coway Co., Ltd.
- Apparatus and method for waste-water reduction in laboratory water purification system8 Oct 2026US 2026/0308022 A1Thermo Orion Inc.
Most cited
By later US patents
- Methods and systems for improved dosing of a chemical treatment, such as chlorine dioxide, into a fluid stream, such as a wastewater stream595US 6,949,196 B2Fkos, LLC · 2005
- Method and apparatus for capacitive deionization, electrochemical purification, and regeneration of electrodes157US 5,425,858 AThe Regents of the University of California · 1995
- Sorbent reactor for extracorporeal blood treatment systems, peritoneal dialysis systems, and other body fluid treatment systems152US 7,169,303 B2HemoCleanse Technologies LLC · 2007
- Process and apparatus for treatment of fluids, particularly desalinization of aqueous solutions140US 4,636,296 A1987
- Method and apparatus for treating cooling tower water124US 4,764,283 A1988