C02F 1/441
By reverse osmosis
Official title: {by reverse osmosis}
C02F1/441 (By reverse osmosis) appears on 2,637 US grants and 3,826 published applications in this corpus.
Search patents in C02F- Granted patents
- 2,637
- Published applications
- 3,826
- Assignees
- 1,635
- Inventors
- 6,676
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 16 | 0 |
| 1989 | 13 | 0 |
| 1990 | 8 | 0 |
| 1991 | 22 | 0 |
| 1992 | 24 | 0 |
| 1993 | 21 | 0 |
| 1994 | 24 | 0 |
| 1995 | 15 | 0 |
| 1996 | 17 | 0 |
| 1997 | 27 | 0 |
| 1998 | 28 | 0 |
| 1999 | 37 | 0 |
| 2000 | 43 | 0 |
| 2001 | 39 | 5 |
| 2002 | 49 | 47 |
| 2003 | 35 | 44 |
| 2004 | 26 | 76 |
| 2005 | 32 | 78 |
| 2006 | 31 | 78 |
| 2007 | 30 | 70 |
| 2008 | 37 | 91 |
| 2009 | 49 | 111 |
| 2010 | 58 | 133 |
| 2011 | 63 | 158 |
| 2012 | 60 | 149 |
| 2013 | 76 | 169 |
| 2014 | 97 | 176 |
| 2015 | 87 | 176 |
| 2016 | 84 | 175 |
| 2017 | 108 | 212 |
| 2018 | 125 | 190 |
| 2019 | 175 | 239 |
| 2020 | 174 | 200 |
| 2021 | 171 | 210 |
| 2022 | 152 | 196 |
| 2023 | 151 | 218 |
| 2024 | 164 | 237 |
| 2025 | 148 | 197 |
| 2026 | 92 | 191 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Water purification system29 Sep 2026US 12,747,167 B2Fermi Forward Discovery Group, LLC
- Pure water production system and pure water production method29 Sep 2026US 12,747,171 B2Organo Corporation
- Intelligent reverse osmosis control22 Sep 2026US 12,741,887 B2Ozono Polaris, S.A. de C.V.
- One-way pressure exchange device for reverse osmosis desalination plants15 Sep 2026US 12,734,483 B2
- Method of preparing reverse osmosis membrane with charged hydrogel and polyamide double network8 Sep 2026US 12,728,388 B2
- Filtration manifold with integrated bypass8 Oct 2026US 2026/0307010 A1Midea Group Co., Ltd.
- Contorted polyamide membranes and methods of use thereof8 Oct 2026US 2026/0307019 A1University of Houston System
- 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
- 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
- Hot water disinfection of dialysis machines, including the extracorporeal circuit thereof490US 5,591,344 AAksys, Ltd. · 1997
- Peritoneal dialysis system using reverse osmosis purification device260US 5,498,338 AAbbott Laboratories · 1996
- Hemodialysis machine with automatic priming by induced pressure pulses251US 5,863,421 AAksys, Ltd. · 1999
- Method of rinsing back blood to hemodialysis patient243US 5,690,831 AAksys, Ltd. · 1997
- Methods for ultrafiltration control in hemodialysis212US 5,725,776 AAksys, Ltd. · 1998