B01D 2321/167
Use of scale inhibitors
B01D2321/167 (Use of scale inhibitors) appears on 52 US grants and 84 published applications in this corpus.
Search patents in B01D- Granted patents
- 52
- Published applications
- 84
- Assignees
- 53
- Inventors
- 208
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 2 |
| 2006 | 2 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 5 | 7 |
| 2012 | 1 | 3 |
| 2013 | 4 | 6 |
| 2014 | 1 | 2 |
| 2015 | 1 | 2 |
| 2016 | 2 | 5 |
| 2017 | 3 | 8 |
| 2018 | 3 | 5 |
| 2019 | 1 | 5 |
| 2020 | 5 | 2 |
| 2021 | 3 | 7 |
| 2022 | 2 | 6 |
| 2023 | 3 | 5 |
| 2024 | 3 | 4 |
| 2025 | 2 | 3 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Water treatment method and water treatment agent composition8 Sep 2026US 12,728,390 B2Organo Corporation
- Method for operating reverse osmosis membrane device, a slime control method, and a water treatment device16 Jun 2026US 12,655,041 B2Kurita Water Industries Ltd.
- Techniques for managing scale formation in reverse osmosis (RO) and nanofiltration (NF) systems and a hybrid filtration architecture implementing the same12 May 2026US 12,623,921 B2Clean H2O Technologies, LLC
- Optical concentrate monitoring for membrane scaling mitigation12 May 2026US 12,625,063 B2Colorado School of Mines
- Control method for delaying nanofiltration membrane aluminum fouling of water treatment system2 Dec 2025US 12,486,179 B2Greentech Environment Co., Ltd.
- Control device, control method, and control program20 Aug 2026US 2026/0242254 A1Yokogawa Electric Corporation
- Membrane treatment method, biofouling inhibition method, and endotoxin production inhibition method in water system9 Jul 2026US 2026/0193116 A1Kurita Water Industries Ltd.
- Electrodialysis process with active foulant removal sequence12 Feb 2026US 2026/0042065 A1Evoqua Water Technologies LLC
- Method for operating reverse osmosis membrane device22 Jan 2026US 2026/0022035 A1Kitagawa Industries Co., Ltd.
- Control method for delaying nanofiltration membrane aluminum fouling of water treatment system16 Oct 2025US 2025/0320134 A1Greentech Environment Co., Ltd.
Most cited
By later US patents
- Water filtration using immersed membranes113US 6,375,848 B1Zenon Environmental Inc. · 2002
- Method and apparatus for measuring the fouling potential of membrane system feeds92US 5,198,116 AD. W. Walker & Associates · 1993
- Water filtration using immersed membranes67US 6,899,812 B2Zenon Environmental Inc. · 2005
- Water filtration using immersed membranes58US 7,025,885 B2Zenon Environmental Inc. · 2006
- Hybrid TFC RO membranes with nitrogen additives37US 8,567,612 B2NanoH2O, Inc. · 2013