B01D 61/025
Reverse osmosis
Official title: {Reverse osmosis; Hyperfiltration}
B01D61/025 (Reverse osmosis) appears on 1,911 US grants and 2,556 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,911
- Published applications
- 2,556
- Assignees
- 1,234
- Inventors
- 5,088
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 6 | 0 |
| 1978 | 8 | 0 |
| 1979 | 16 | 0 |
| 1980 | 6 | 0 |
| 1981 | 6 | 0 |
| 1982 | 7 | 0 |
| 1983 | 6 | 0 |
| 1984 | 9 | 0 |
| 1985 | 8 | 0 |
| 1986 | 12 | 0 |
| 1987 | 11 | 0 |
| 1988 | 12 | 0 |
| 1989 | 11 | 0 |
| 1990 | 13 | 0 |
| 1991 | 20 | 0 |
| 1992 | 21 | 0 |
| 1993 | 24 | 0 |
| 1994 | 19 | 0 |
| 1995 | 12 | 0 |
| 1996 | 27 | 0 |
| 1997 | 30 | 0 |
| 1998 | 20 | 0 |
| 1999 | 29 | 0 |
| 2000 | 24 | 0 |
| 2001 | 30 | 4 |
| 2002 | 26 | 35 |
| 2003 | 18 | 33 |
| 2004 | 16 | 59 |
| 2005 | 22 | 41 |
| 2006 | 24 | 45 |
| 2007 | 23 | 56 |
| 2008 | 23 | 55 |
| 2009 | 30 | 69 |
| 2010 | 37 | 91 |
| 2011 | 37 | 88 |
| 2012 | 48 | 109 |
| 2013 | 42 | 99 |
| 2014 | 70 | 98 |
| 2015 | 63 | 128 |
| 2016 | 56 | 126 |
| 2017 | 68 | 154 |
| 2018 | 95 | 155 |
| 2019 | 120 | 137 |
| 2020 | 117 | 141 |
| 2021 | 105 | 141 |
| 2022 | 109 | 148 |
| 2023 | 81 | 135 |
| 2024 | 104 | 164 |
| 2025 | 108 | 132 |
| 2026 | 75 | 113 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods of dewatering of alcoholic solutions via forward osmosis and related systems6 Oct 2026US 12,752,239 B2Porifera, Inc.
- Waterflooding system and process to prevent scale precipitation in oil fields6 Oct 2026US 12,753,685 B2Saudi Arabian Oil Company
- Filter cartridge and water purification system22 Sep 2026US 12,741,249 B2Foshan Micro Midea Filter Mfg. Co., Ltd.
- 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
- Concentrated milk protein preparations8 Oct 2026US 2026/0305634 A150G Inc.
- Filtration manifold with integrated bypass8 Oct 2026US 2026/0307010 A1Midea Group Co., Ltd.
- Modified polyvinylidene fluoride membranes for water filtration8 Oct 2026US 2026/0307011 A1Uchicago Argonne, LLC
- 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
Most cited
By later US patents
- Purification of saline water838US 4,036,749 A1977
- Hot water disinfection of dialysis machines, including the extracorporeal circuit thereof490US 5,591,344 AAksys, Ltd. · 1997
- Fluid separation and delivery apparatus and method279US 6,852,219 B22005
- 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