B01D 2311/268
Water softening
B01D2311/268 (Water softening) appears on 19 US grants and 35 published applications in this corpus.
Search patents in B01D- Granted patents
- 19
- Published applications
- 35
- Assignees
- 25
- Inventors
- 71
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2014 | 0 | 3 |
| 2015 | 1 | 2 |
| 2016 | 0 | 2 |
| 2017 | 1 | 5 |
| 2018 | 1 | 3 |
| 2019 | 2 | 4 |
| 2020 | 1 | 3 |
| 2021 | 6 | 6 |
| 2022 | 1 | 0 |
| 2023 | 2 | 3 |
| 2024 | 2 | 4 |
| 2025 | 0 | 0 |
| 2026 | 2 | 0 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Methods and systems for treating phosphogypsum-containing water10 Mar 2026US 12,570,559 B2Evoqua Water Technologies LLC
- Water treatment method and water treatment apparatus10 Mar 2026US 12,570,560 B2Yokogawa Electric Corporation
- Reverse osmosis or nanofiltration process for cleaning water6 Feb 2024US 11,890,577 B2Ide Water Technologies Ltd.
- Water filtration system with waste water treatment9 Jan 2024US 11,866,350 B1Aphinity
- Wastewater treatment method and wastewater treatment apparatus24 Oct 2023US 11,794,147 B2De Nora Permelec Ltd
- Self-mediated saltless whole home water treatment systems and methods4 Jul 2024US 2024/0217855 A1Pentair, Inc.
- Improved reverse osmosis or nanofiltration process for cleaning water6 Jun 2024US 2024/0181392 A1Ide Water Technologies Ltd.
- Reverse osmosis or nanofiltration process for cleaning water23 May 2024US 2024/0165562 A1Ide Water Technologies Ltd.
- Reverse osmosis or nanofiltration process for cleaning water7 Mar 2024US 2024/0075428 A1Ide Water Technologies Ltd.
- Water treatment method and water treatment apparatus14 Dec 2023US 2023/0399249 A1Yokogawa Electric Corporation
Most cited
By later US patents
- Combination multi-effect distillation and multi-stage flash evaporation system16US 9,539,522 B1Kuwait Institute for Scientific Research · 2017
- Process and apparatus for enriching silicate in drinking water11US 11,220,448 B2Krones AG · 2022
- Water treatment systems and methods5US 10,384,967 B2Oasys Water, Inc. · 2019
- Methods of separating and isolating water and other desired constituents from oilfield produced brines for reuse2US 10,899,646 B2NLB Water, LLC · 2021
- Methods and systems for treating high temperature produced water2US 10,906,001 B2Chevron U.S.A.Inc. · 2021