C02F 1/001
Processes for the treatment of water whereby the filtration technique is of
Official title: {Processes for the treatment of water whereby the filtration technique is of importance (C02F1/44 takes precedence; construction of filters in general B01D24/00 - B01D41/00)}
C02F1/001 (Processes for the treatment of water whereby the filtration technique is of) appears on 5,321 US grants and 7,220 published applications in this corpus.
Search patents in C02F- Granted patents
- 5,321
- Published applications
- 7,220
- Assignees
- 3,323
- Inventors
- 12,400
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 8 | 0 |
| 1978 | 21 | 0 |
| 1979 | 13 | 0 |
| 1980 | 10 | 0 |
| 1981 | 11 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 13 | 0 |
| 1985 | 11 | 0 |
| 1986 | 13 | 0 |
| 1987 | 25 | 0 |
| 1988 | 29 | 0 |
| 1989 | 25 | 0 |
| 1990 | 19 | 0 |
| 1991 | 35 | 0 |
| 1992 | 44 | 0 |
| 1993 | 36 | 0 |
| 1994 | 37 | 0 |
| 1995 | 32 | 0 |
| 1996 | 41 | 0 |
| 1997 | 39 | 0 |
| 1998 | 34 | 0 |
| 1999 | 64 | 0 |
| 2000 | 63 | 0 |
| 2001 | 77 | 17 |
| 2002 | 80 | 89 |
| 2003 | 83 | 140 |
| 2004 | 79 | 154 |
| 2005 | 89 | 217 |
| 2006 | 102 | 228 |
| 2007 | 106 | 182 |
| 2008 | 109 | 187 |
| 2009 | 104 | 184 |
| 2010 | 111 | 239 |
| 2011 | 105 | 265 |
| 2012 | 149 | 241 |
| 2013 | 143 | 254 |
| 2014 | 164 | 288 |
| 2015 | 139 | 272 |
| 2016 | 143 | 308 |
| 2017 | 187 | 370 |
| 2018 | 251 | 393 |
| 2019 | 308 | 429 |
| 2020 | 345 | 473 |
| 2021 | 373 | 436 |
| 2022 | 331 | 440 |
| 2023 | 315 | 400 |
| 2024 | 278 | 380 |
| 2025 | 290 | 338 |
| 2026 | 210 | 296 |
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.
- Composite filter and water purifier including same6 Oct 2026US 12,753,091 B2Coway Co., Ltd.
- Shower system with a filter6 Oct 2026US 12,753,092 B2
- Systems and methods for stormwater management6 Oct 2026US 12,753,093 B2Advanced Drainage Systems, Inc.
- Structure and apparatus for purifying and containing high clarity water used for direct contact recreational purposes6 Oct 2026US 12,753,094 B2Crystal Lagoons Technologies, Inc.
- Automated liquid dispensing device8 Oct 2026US 2026/0305569 A1Automated Pet Care Products, LLC d/b/a WHISKER
- 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.
- Self-managed water purifier8 Oct 2026US 2026/0308016 A1Coway Co., Ltd.
- Modular multi-filter systems and methods of use1 Oct 2026US 2026/0295538 A1Pentair Water Pool and Spa, Inc.
- Environmentally safe ultra-high pressure surface cleaning system1 Oct 2026US 2026/0295644 A1VAE Louisiana, LLC
Most cited
By later US patents
- Inductively coupled ballast circuit436US 6,825,620 B2Access Business Group International LLC · 2004
- Water treatment system with an inductively coupled ballast432US 6,436,299 B1Amway Corporation · 2002
- Radio frequency identification system for a fluid treatment system361US 6,673,250 B2Access Business Group International LLC · 2004
- Inductively coupled ballast circuit355US 7,385,357 B2Access Business Group International LLC · 2008
- Inductively powered apparatus349US 7,126,450 B2Access Business Group International LLC · 2006