Y02A 20/131
Reverse-osmosis
Y02A20/131 (Reverse-osmosis) appears on 1,325 US grants and 1,743 published applications in this corpus.
Search patents in Y02A- Granted patents
- 1,325
- Published applications
- 1,743
- Assignees
- 784
- Inventors
- 3,223
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 1 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 12 | 0 |
| 1983 | 8 | 0 |
| 1984 | 7 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 10 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 5 | 0 |
| 1999 | 9 | 0 |
| 2000 | 13 | 0 |
| 2001 | 17 | 2 |
| 2002 | 12 | 9 |
| 2003 | 13 | 16 |
| 2004 | 13 | 34 |
| 2005 | 12 | 25 |
| 2006 | 16 | 34 |
| 2007 | 16 | 46 |
| 2008 | 19 | 42 |
| 2009 | 24 | 63 |
| 2010 | 30 | 74 |
| 2011 | 41 | 109 |
| 2012 | 41 | 77 |
| 2013 | 45 | 65 |
| 2014 | 54 | 75 |
| 2015 | 53 | 78 |
| 2016 | 50 | 85 |
| 2017 | 46 | 90 |
| 2018 | 71 | 102 |
| 2019 | 74 | 85 |
| 2020 | 70 | 94 |
| 2021 | 76 | 96 |
| 2022 | 76 | 102 |
| 2023 | 88 | 130 |
| 2024 | 91 | 114 |
| 2025 | 79 | 57 |
| 2026 | 39 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of preparing reverse osmosis membrane with charged hydrogel and polyamide double network8 Sep 2026US 12,728,388 B2
- Method for operating separation membrane module, computer-readable recording medium having program recorded thereon, and water production system18 Aug 2026US 12,708,878 B2Toray Industries, Inc.
- Composite semipermeable membrane, spiral membrane element, water treatment system, and water treatment method18 Aug 2026US 12,708,880 B2Nitto Denko Corporation
- Thin-film composite membranes synthesized by multi-step coating methods18 Aug 2026US 12,708,881 B2Katholieke Universiteit Leuven
- Method for purifying liquid and system for the implementation thereof11 Aug 2026US 12,702,952 B2Electrophor, Inc.
- Composite semipermeable membrane, composite semipermeable membrane module, fluid separation device, and method for producing composite semipermeable membrane6 Aug 2026US 2026/0225045 A1Toray Industries, Inc.
- Energy-free and spontaneous reverse osmosis device6 Aug 2026US 2026/0225921 A1Xi'an Xishizun Electromechanical Technology Co., Ltd
- Altering properties of a fluid and magnetically assisted desalination6 Aug 2026US 2026/0225927 A1
- Water distillation membranes and methods for using the same30 Jul 2026US 2026/0216668 A1Cellulotech Inc
- Cross-linkable zwitterionic polymers and their use in membrane filters30 Jul 2026US 2026/0216671 A1Trustees of Tufts College
Most cited
By later US patents
- Water-mist blower cooling system and its new applications215US 6,293,121 B12001
- Hollow fiber cartridge165US 5,470,469 AE. I. Du Pont de Nemours and Company · 1995
- Fluid separation apparatus143US 4,451,369 AToyo Boseki Kabushiki Kaisha · 1984
- Maritime power plant system with processes for producing, storing and consuming regenerative energy134US 6,100,600 A2000
- Potting of tubular bundles in housing125US 6,113,782 ATerumo Cardiovascular Systems Corporation · 2000