B01D 2311/251
Recirculation of permeate
B01D2311/251 (Recirculation of permeate) appears on 127 US grants and 197 published applications in this corpus.
Search patents in B01D- Granted patents
- 127
- Published applications
- 197
- Assignees
- 126
- Inventors
- 446
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 4 |
| 2013 | 0 | 2 |
| 2014 | 3 | 5 |
| 2015 | 1 | 4 |
| 2016 | 4 | 11 |
| 2017 | 4 | 6 |
| 2018 | 7 | 19 |
| 2019 | 9 | 10 |
| 2020 | 10 | 25 |
| 2021 | 11 | 27 |
| 2022 | 16 | 21 |
| 2023 | 19 | 25 |
| 2024 | 13 | 12 |
| 2025 | 13 | 18 |
| 2026 | 14 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for purifying solvents1 Sep 2026US 12,722,140 B2Fujifilm Electronic Materials U.S.A., Inc.
- System and method for separating a gas mixture25 Aug 2026US 12,714,968 B2Haffmans B.V.
- 4-stage membrane process with sweep for biogas upgrading16 Jun 2026US 12,654,126 B2
- Filtering device, purification device, and method for manufacturing chemical liquid16 Jun 2026US 12,654,136 B2FUJIFILM Corporation
- Crystallization of salts from high pressure reverse osmosis concentrate16 Jun 2026US 12,655,040 B2Saltworks Technologies Inc.
- Continuous tangential flow filtration system2 Jul 2026US 2026/0183714 A1Eli Lilly and Company
- Method for controlling water purification21 May 2026US 2026/0138090 A1Baxter Healthcare S. A.
- Lithium purification and conversion14 May 2026US 2026/0132040 A1Schlumberger Technology Corporation
- Electrochemical metallurgical slag recycling14 May 2026US 2026/0132484 A1Electrasteel, Inc.
- Reverse Osmosis Systems and Methods26 Feb 2026US 2026/0054223 A1B. G. Negev Technologies and Applications Ltd.
Most cited
By later US patents
- Gas separator71US 4,119,417 ATokyo Shibaura Electric Co., Ltd. · 1978
- RO system and method for disinfecting lines of the RO system24US 9,254,358 B22016
- Concentrating aqueous solutions via hybridizing electrodialysis and other desalination techniques16US 10,626,037 B2Massachusetts Institute of Technology · 2020
- Low pressure feed membrane separation process15US 5,306,427 APermea, Inc. · 1994
- Systems and methods for producing regenerant brine and desalinated water from high temperature produced water15US 9,932,257 B2Chevron U.S.A.Inc. · 2018